When NWS proposes or finalizes changes to products or services, this page is updated and official notices are sent out on the NOAA Weather Wire Service (NWWS), the Emergency Managers Weather Information Network (EMWIN), NOAAPort, and Subscribers

Subscribe PNS-SCN list,   Unsubscribe 
For NOAA staff: Focal Point list

• Service Change Notices ( SCN - Current-2023) 
• Data Management Messages
• Archive of PNS/SCN/TIN (1996-2022)

Public Information Statements 2026

• Feb 11: PNS26-13: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on February 19, 2026
• Feb 11: PNS26-12: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on February 17, 2026
• Feb 10: PNS26-11: Soliciting Comments through March 13, 2026 on Proposed Change to Water Level Datum Displayed on the National Water Prediction Service (NWPS) Webpage
• Feb 06: PNS26-10: Soliciting Comments on the Upgrade of the Nearshore Wave Prediction System (NWPS) to Version 1.5.0 through March 16, 2026
• Feb 04: PNS25-59: Updated: Soliciting comments through July 31, 2026 for potential changes to Red Flag Warning standard formatting
• Feb 03: PNS26-09: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Miley Memorial Field (KBPI) and Worland Municipal Airport (KWRL) through March 5, 2026
• Feb 03: PNS26-08: Soliciting Comments on Experimental Graphical Turbulence Guidance (GTG) Nowcast (GTGN) product through March 5, 2026
• Jan 28: PNS26-07: Soliciting Comments through February 28, 2026 on the Proposed Replacement of GEFS Aerosol Products with the Global Chemistry and Aerosol Forecast System (GCAFS) version 1.0
• Jan 22: PNS26-06: Soliciting Comments on Proposed Changes to the Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model through February 20, 2026
• Jan 13: PNS26-05: Public Information Statement Implementing a Relative Oceanic Niño Index effective February 1, 2026
• Jan 07: PNS26-04: Soliciting comments through February 10, 2026 on the proposed discontinuance of the 36-hour wind and wave forecast for a small portion of the Atlantic and Pacific Oceans
• Jan 07: PNS26-03: Soliciting Comments through February 9, 2026 on the Discontinuation of the State Forecast Product (SFP)
• Jan 06: PNS26-02: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on January 15, 2026
• Jan 06: PNS26-01: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on January 13, 2026

Public Information Statements 2025

• Dec 22: PNS25-81: Soliciting Comments on the new Experimental High Seas Gridded Forecasts from the Ocean Prediction Center (OPC) in the National Digital Forecast Database (NDFD) through September 30, 2026
• Dec 17: PNS25-80: Soliciting Comments through January 19, 2026 on the  Discontinuation of the Mexican Weather Roundup and the Latin  America and Caribbean Hourly Weather Roundup (RWRMX) Products
• Dec 16: PNS25-79: Soliciting Comments through January 16, 2026 on the Discontinuation of the Temperature and Precipitation Table Products (TPT)
• Dec 12: PNS25-78: Soliciting Comments on the Upgrade of the Surge and Tide Operational Forecast System (STOFS) to Version 3.1.0 through January 16, 2026
• Dec 10: PNS25-77: Soliciting comments on the upgrade of the National Water Model to Version 3.1 through January 29, 2026
• Dec  9: PNS25-76: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on December 18, 2025
• Dec  9:  PNS25-75: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on December 16, 2025
• Nov 26: PNS25-74: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Castle Airport (KMER), Atwater CA, through December 26, 2025
• Nov 20: PNS25-73: Soliciting comments on the proposed termination of the North American Mesoscale Forecast System (NAM) Model Output Statistics (NAM MOS) products, through Monday, December 22, 2025
• Nov 19: PNS25-72: Soliciting Comments through December 19, 2025 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Alaska Region, Eastern Region, and Western Region Offices
• Nov 17: PNS25-68: Updated:  Soliciting comments through December 1, 2025 on the proposed reduction in coverage areas for the High Seas Forecast near the Equator and International Dateline
• Nov 13: PNS25-71: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on November 20, 2025
• Nov 13: PNS25-70: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on November 18, 2025 
• Nov  6: PNS24-67: Updated: Soliciting Comments on the experimental Graphical Week Two Marine Wind Speed and Wave Height Probabilities through November 30, 2026
• Nov  4: PNS25-69: Soliciting Comments on the new Experimental Graphical Marine Wind Warnings through November 1, 2026
• Oct 21: PNS24-77: Updated: Soliciting Comments through September 30, 2026, on the Experimental Hydrologic Ensemble Forecast Service (HEFS) API Data Services
• Oct   9: PNS25-65: Updated: Soliciting comments through November 7, 2025 for termination of Miscellaneous Fire Weather Product (FWM) used to produce National Fire Danger Rating System (NFDRS) forecasts
• Oct   9: PNS19-36: Updated: Soliciting Comments on Experimental Winter Storm Outlook through May 15, 2026
• Oct   3: PNS25-68: Soliciting comments through November 3, 2025 on the proposed reduction in coverage areas for the High Seas Forecast near the Equator and International Dateline
• Oct   1: PNS25-67: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on October 7, 2025
• Oct   1: PNS25-66: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on October 9, 2025
• Sep 29: PNS21-68: Updated: Soliciting Comments on the Experimental Standardized Weather Forecast Office (WFO) Avalanche Weather Webpage at 18 WFOs through April 30, 2026
• Sep 29: PNS24-72: Updated: Soliciting Comments through June 30, 2026 on the Experimental Probabilistic Precipitation Portal
• Sep 25: PNS25-65: Updated: Soliciting comments through November 7, 2025 for termination of Miscellaneous Fire Weather Product (FWM) used to produce National Fire Danger Rating System (NFDRS) forecasts
• Sep 22: PNS25-64: Proposal of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Arapahoe County, Colorado effective March 2026
• Sep 16: PNS25-63: Soliciting Comments on the Experimental Urban Rain Rate Dashboard through September 30, 2026
• Sep 15: PNS25-62: Soliciting comments on the proposed new Global Cache service for WIS 2.0 services through October 24, 2025
• Sep  3: PNS25-61: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on September 11, 2025
• Sep  3: PNS25-60: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on September 9, 2025
• Sep  3: PNS23-55: Updated: Soliciting Comments on Experimental Flood Inundation Mapping (FIM) Services through September 30, 2026
• Aug 28: PNS25-58: Updated: Soliciting Comments on the Experimental National Water Center (NWC) Synthetic Aperture Radar River Ice Surveillance (SARRIS) Product through August 31, 2027
• Aug 28: PNS25-59: Updated: Soliciting comments through July 31, 2026 for potential changes to Red Flag Warning standard formatting
• Aug 28: PNS25-58: Updated: Soliciting Comments on the Experimental National Water Center (NWC) Synthetic Aperture Radar River Ice Surveillance (SARRIS) Product through August 31, 2027
• Aug 27: PNS25-57: Soliciting feedback on proposed changes to Alaska Aviation Weather Unit Surface and Significant Weather charts through October 29, 2025
• Aug 21: PNS25-56: Soliciting Public Comments on the Termination of Various Graphics from the EMC Verification System (EVS) Website through September 20, 2025
• Aug 11: PNS25-55: Anchorage Federal Building Power Outage will affect some NWS Operational Data from August 16 to August 18, 2025
• Aug  4: PNS25-54: Soliciting Comments on Proposed Enhancements to the Probabilistic Winter Storm Severity Index through September 6, 2025
• Aug  4: PNS22-43: Updated: Extending Comment Period for the National Water Center’s Experimental Area Hydrologic Discussion Product through June 30, 2026
• Jul 31: PNS25-53: Soliciting comments on the proposed thinning of percentile data for the next implementation of the National Blend of Models (NBM) through October 6, 2025
• Jul 25: PNS25-52: Soliciting Comments on the Proposed Discontinuation of the Global Ensemble Forecast System (GEFS) Aerosol Component 06 and 18 UTC Forecasts through August 24, 2025
• Jul 25: PNS25-51: Soliciting Comments on the Proposed Termination of the Short Range Ensemble Forecast System (SREF) through August 24, 2025
• Jul 23: PNS25-50: Soliciting Comments on the NWS Use of the Bluesky Social Media Platform through January 26, 2026 
• Jul 21: PNS25-49: Soliciting Comments on Proposed Changes to the Winter Storm Severity Index through August 22, 2025
• Jul 18: PNS25-48: Use of singular Valid Time Event Code (VTEC) for NWS Freezing Spray Effective July 17, 2025
• Jul 16: PNS25-47: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on July 22, 2025
• Jul 16: PNS25-46: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on July 24, 2025
• Jul 15: PNS25-45: Soliciting Comments on the Proposed Upgrade of the National Blend of Models through November 21, 2025
• Jul  9: PNS25-44: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Las Vegas Municipal Airport and Tucumcari Municipal Airport through Monday August 11, 2025
• Jul  3: PNS25-43: Soliciting comments on the proposed new Global Broker service for WIS 2.0 services through August 11, 2025
• Jul  1: PNS20-28 Updated: Soliciting Comments on the Experimental National Water Center Visualization Services through June 30, 2026
• Jun 26: PNS25-42: Soliciting Comments on the Proposed Termination of Various Environmental Modeling Center Web Sites and Data Products through July 26, 2025
• Jun 26: PNS25-41: Soliciting Comments on Proposed Discontinuation of the North American Mesoscale (NAM) model and other Regional Modeling Systems to be Replaced by the Rapid Refresh Forecast System (RRFS) through July 26, 2025
• Jun 17: PNS25-35 Updated: Soliciting Feedback through July 28, 2025 on consolidating NWS Dissemination Applications, including the WMO Regional Association IV GTS Internet File Service (RA-IV GIFS) Website. 
• Jun 12: PNS25-40: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on June 16, 2025
• Jun 12: PNS25-39: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on June 17, 2025
• Jun 09: PNS25-38: Soliciting Comments for Addition of Mountain Wave Turbulence to the Graphical AIRMETs through August 1, 2025 
• May 27: PNS25-37: Soliciting Feedback through June 26, 2025 on the Potential Retirement of the Model Analysis and Guidance (MAG) Website
• May 27: PNS25-36: Soliciting Feedback through June 26, 2025 on consolidating NWS Dissemination Applications, including the stand-alone alerts.weather.gov webpage
• May 27: PNS25-35: Soliciting Feedback through June 26, 2025 on consolidating NWS Dissemination Applications, including the WMO Regional Association IV GTS Internet File Service (RA-IV GIFS) Website
• May 21: PNS25-34: Soliciting comments on expansion of experimental Spanish-Translated Tropical Cyclone Products to the Central Pacific and those issued by WPC through November 30, 2025
• May 20: PNS24-13 Updated: Soliciting Comments on Experimental Spanish-Translated Tropical Cyclone Products from the National Hurricane Center (NHC) through November 30, 2025
• May 20: PNS25-33: Soliciting Comments through June 25, 2025 on the proposed discontinuation of the condensed versions of offshore marine forecast products
• May 17: PNS25-32: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on May 27, 2025.
• May 17: PNS25-31: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on May 28, 2025
• May 7: PNS24-77: Updated: Soliciting Comments through September 30, 2026, on the Experimental Hydrologic Ensemble Forecast Service (HEFS) API Data Services
• May 5: PNS25-30: Soliciting Comments through June 6, 2025 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for National Weather Service (NWS) Honolulu Forecast Office (HFO)
• May  1: PNS25-29: Soliciting Feedback on the World Meteorological Organization (WMO) Information System (WIS2.0) WIS2 Node API and Service through June 6, 2025
• May  1: PNS25-28: Soliciting Comments on the Proposed Upgrade of LAMP and Gridded LAMP Guidance through May 30, 2025
• Apr 22: PNS25-27: Hurricane Threats and Impacts (HTI) Mosaic Testing on April 24, 2025 (backup date: April 29, 2025)
• Apr 17: PNS24-67: Updated: Soliciting Comments on the experimental Graphical Week Two Marine Wind Speed and Wave Height Probabilities through November 30, 2026
• Apr 17: PNS25-26: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on April
  24, 2025
• Apr 17: PNS25-25: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on April 22, 2025
• Apr 16: PNS24-31 Updated: Soliciting Comments on Experimental HeatRisk Grids in the National Digital Forecast Database (NDFD) and WPC HeatRisk CONUS Viewer through September 30, 2025
• Apr 14: PNS25:24 Soliciting Comments on Proposed Changes to the  Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model through May 14, 2025
• Apr 14: PNS25-23: Soliciting Comments through May 14, 2025 on the Proposed Upgrade of the Global Forecast System (GFS) to Version
  16.4.0
• Apr  9: PNS25-22: Soliciting Comments through May 10, 2025 on the Proposed Upgrade of the Real-Time Ocean Forecast System (RTOFS) to version 2.5
• Apr  3: PNS25-21: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Talladega Municipal Airport, Talladega AL (KASN) through May 3, 2025
• Apr  3: PNS25-20: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Bryce Canyon Airport (KBCE), Bryce UT, through May 3, 2025.
• Apr  1: PNS22-18 Updated: Weather Forecast Office (WFO) Guam to Produce Experimental Public and Marine Grids for East and West Micronesia for Inclusion into the National Digital Forecast Database: Effective March 29, 2022
• Mar 24: PNS24-42 Updated: Soliciting Comments on Updates to the Experimental Tropical Cyclone Track and Error Cone Graphic from the National Hurricane Center Through November 30, 2025
• Mar 24: PNS25-19: Soliciting public comments through April 20, 2025 on the proposed discontinuation of the Unified Surface Analysis
• Mar 20: PNS25-18: Reduction of Radiosonde Observations (RAOB) to One Flight Per Day at Aberdeen, SD, Gaylord, MI, Grand Junction, CO, Green Bay, WI, North Platte, NE, and Riverton, WY, Effective March 20, 2025.
• Mar 20: PNS25-17: Suspension of Radiosonde Observations at Omaha, Nebraska, and Rapid City, South Dakota, Effective March 20, 2025.
• Mar 20: PNS25-16: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecasts (TAF) at and Falmouth Joint Base Cape Cod, Barnstable County, MA (KFMH) and Westfield-Barnes Regional Airport, Westfield, MA (KBAF) through April 30, 2025.
• Mar 19: PNS25-15: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on March 27, 2025
• Mar 19: PNS25-14: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on March 25, 2025
• Mar 17: PNS25-13: Delay of the Spring 2025 Forecast Zones Implementation Date to March 19, 2025
• Mar 14: PNS25-12: Soliciting Comments through April 14, 2025 on the Proposed Upgrade of the Hurricane Analysis and Forecast System (HAFS) to version 2.1
• Mar  7:PNS25-11: Intermittent Suspension of Radiosonde Observations at Albany, New York, and Gray, Maine, Effective Immediately
• Mar  6:PNS25-10: Soliciting Comments through May 30, 2025 on the Experimental Modernized Hydrologic Outlook (ESF) and River Summary (RVA) for Alaska Spring River Ice Breakup
• Mar  3:PNS25-09: Soliciting Comments on the Addition of Experimental Probabilistic Hazard Information to the 8- to 14-day Hazards
  Outlook (Contiguous U.S. and Alaska) through June 30, 2025
• Feb 27: PNS25-08: Suspension of Radiosonde Observations at Kotzebue, Alaska, Effective Immediately
• Feb 20: PNS25-07: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on February 27, 2025
• Feb 20: PNS25-06: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on February 25, 2025
• Feb 13: PNS25-05: National Weather Service (NWS) Implementation of Updated Naming Conventions per Executive Order 14172
• Feb 6: PNS23-59 Updated: Soliciting Comments through December 31, 2025 on the Experimental NWS Translation Website
• Jan 28: PNS19-38 Updated: Soliciting Comments on the Experimental Probabilistic Quantitative Precipitation Forecast (PQPF) Webpages through November 21, 2025
• Jan 27: PNS25-04: Soliciting Comments for Changes to the Convective Significant Meteorological Information Product through February 28, 2025
• Jan 22: PNS25-03: Soliciting Comments through February 21, 2025, on the Proposed Upgrade of the Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT) to Version 9.0
• Jan 21: PNS25-02: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on January 30, 2025
• Jan 21: PNS25-01: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on January 28, 2025

Public Information Statements 2024

• Dec 18: PNS24-78: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecasts (TAFs) at Anniston Regional Airport, Anniston, Alabama (KANB) through January 18, 2025
• Dec 18: PNS24-77: Updated: Soliciting Comments through September 30, 2026, on the Experimental Hydrologic Ensemble Forecast Service (HEFS) API Data Services
• Dec 18: PNS24-76: Soliciting Comments on Proposed Changes to the Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model through January 22, 2025
• Dec 16: PNS24-75: Soliciting Comments on Upgrade 4.3 of the National Blend of Models through January 21, 2025
• Dec  9: PNS24-73 Updated: CANCELED: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on December 12, 2024
• Dec  9: PNS24-66 Updated: Potential API Gridded Forecast Data Outage from December 22, 2024 through January 1, 2025
• Dec  4: PNS24-74: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on December 10, 2024
• Dec  9: PNS24-73 Updated: CANCELED: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on December 12, 2024
• Dec  9: PNS24-66 Updated: Potential API Gridded Forecast Data Outage from December 22, 2024 through January 1, 2025
• Nov 14: PNS24-72: Updated: Soliciting Comments through June 30, 2026 on the Experimental Probabilistic Precipitation Portal
• Nov  8: PNS24-71: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on November 12, 2024
• Nov  8: PNS24-70: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on November 14, 2024
• Oct 31: PNS24-69: Soliciting Comments through December 1, 2024 to Support Termination of the 72-Hour Low Tracks Graphic and the Non-Technical 72-Hour Low Tracks Graphic
• Oct 28: PNS24-68: Soliciting Comments for Transition of Select Area Forecasts (FA) through November 28, 2024
• Oct 16: PNS24-67: Updated: Soliciting Comments on the experimental Graphical Week Two Marine Wind Speed and Wave Height Probabilities through November 30, 2026
• Oct 16: PNS22-10 Updated: Soliciting Comments until May 31, 2025 on Snow Ratio Grids as an Experimental Element in the National Digital Forecast Database (NDFD)
• Dec 9: PNS24-66 Updated: Potential API Gridded Forecast Data Outage from December 22, 2024 through January 1, 2025
• Oct 16: PNS24-65: Soliciting Comments on the Proposed Termination of the Tropical Weather Summary through November 20, 2024
• Oct 15: PNS21-68: Updated: Soliciting Comments on the Experimental Standardized Weather Forecast Office (WFO) Avalanche Weather Webpage at 18 WFOs through April 30, 2026
• Oct 10: PNS24-64 Updated: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast Scheduled for October 17, 2024 Canceled
• Oct 10: PNS24-63 Updated: National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast Scheduled for October 15, 2024 Canceled
• Oct  7: PNS19-36: Updated: Soliciting Comments on Experimental Winter Storm Outlook through May 15, 2026
• Oct  7: PNS24-62 Updated: Soliciting Comments through November 2, 2024 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Central Region Offices
• Sep 26: PNS24-61: Soliciting Comments on Prototype NOAA Atlas 15 Precipitation Frequency Services over Montana through January 31, 2025 
• Sep 25: PNS22-42 Updated: Soliciting Comments on the Experimental Flood Hazard Outlook (FHO) Product through June 30, 2025
• Sep 25: PNS22-55 Updated: Soliciting Comments on Experimental Flood Inundation Mapping (FIM) Services through September 30, 2025
• Sep 25: PNS22-43 Updated: Extending Comment Period on the National Water Center's Experimental Area Hydrologic Discussion Product through June 30, 2025
• Feb 6, 2025: PNS23-59 Updated: Soliciting Comments through December 31, 2025 on the Experimental NWS Translation Website
• Sep 11: PNS24-60: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on September 19, 2024
• Sep 11: PNS24-59: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on September 17, 2024
• Aug 27: PNS24-39 Updated: Soliciting Comments through October 16, 2024 on a Proposal to Replace the Imperial Unit "Feet" with the Metric Unit "Meter" in National Marine Center High Seas Text and Graphical Products
• Aug 23: PNS24-58: Soliciting Comments through September 22, 2024 on Upgrading the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0.8
• Aug 23: PNS24-57: Soliciting Comments through September 23, 2024 on the Experimental Deployment of the Global Total Electron Content (GloTEC) Ionosphere Model
• Aug 27: PNS24-39 Updated: Soliciting Comments through October 16, 2024 on a Proposal to Replace the Imperial Unit "Feet" with the Metric Unit "Meter" in National Marine Center High Seas Text and Graphical Products
• Aug 20: PNS22-36 Updated: Extending Comment Period on Experimental Potential Coastal Flood Extent Overlays until August 30, 2025
• Aug 14: PNS24-56: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on August 20, 2024
• Aug 14: PNS24-55: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on August 22, 2024
• Jul 30: PNS24-54: Soliciting Comments through September 16, 2024 on a proposal to implement Partial County Alerting (PCA) via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System for Hennepin County, Minnesota
• Jul 29: PNS24-53: Soliciting Comments through September 16, 2024 on a Proposed Alaska Region change to use the Universal Geographic Code (UGC) County Equivalent Format for Short-Fused Polygon Warning and Advisory Products
• Jul 29: PNS24-52: Soliciting Comments on Upgrading the Climate Data Assimilation System (CDAS) to the Conventional Observation Reanalysis (CORe) through August 30, 2024
• Jul 18: PNS24-51: New Online Maps for NOAA Weather Radio All Hazards (NWR) Coverage and Tsunami Alerting Areas Along the Alaska, Washington, Oregon, and California Coastlines
• Jul 18: PNS24-50: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on July 25, 2024
• Jul 18: PNS24-49: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on July 30, 2024
• Jul 17: PNS24-48: Re-commencement of Operational Test and Evaluation (OT&E) for the Replacement Temperature and Dewpoint Sensor for the Automated Surface Observing System (ASOS) during July 2024
• Jul 17: PNS24-47: NWS is Extending the Public Comment and Review on the Experimental Use of Social Media through November 30, 2024
• Jun 28: PNS19-03 Updated: Soliciting Comments on the Experimental Graphical Hazardous Weather Outlook (GHWO) through February 28, 2025
• Jun 21: PNS24-46: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on June 27, 2024
• Jun 21: PNS24-45: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on June 25, 2024
• Jun 14: PNS24-44: Suspension of Radiosonde Observations at Tallahassee, FL: Effective July 1, 2024
• Jun 10: PNS24-43: Soliciting Feedback on the Proposed Use of "Particularly Dangerous Situation" Wording in Blizzard Warnings and Ice Storm Warnings through September 10, 2024
• Jun  3: PNS24-42: Updated: Soliciting Comments on Updates to the Experimental Tropical Cyclone Track and Error Cone Graphic from the National Hurricane Center Through November 30, 2025
• Jun  3: PNS24-41: National Tropical Cyclone Watch Warning Product (TCV) Collaboration Testing June 4, 2024
• Jun  3: PNS24-40: Soliciting Comments on the Proposed Implementation of Key Messages through August 31, 2024
• Aug 27: PNS24-39 Updated: Soliciting Comments through October 16, 2024 on a Proposal to Replace the Imperial Unit "Feet" with the Metric Unit "Meter" in National Marine Center High Seas Text and Graphical Products
• May 28: PNS24-38: Soliciting Comments on the Proposed Changes to Fire Weather Products to Support Discontinuation of Haines Index and Lightning Activity Level (LAL) as Fire Weather Forecast Elements through August 1, 2024
• May 17: PNS24-37: National Tropical Cyclone Watch Warning Product (TCV) Collaboration Testing May 20-24, 2024 (backup Week: June 3-7)
• May 16: PNS24-36: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on May 23, 2024
• May 16: PNS24-35: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on May 21, 2024
• May 14: PNS24-34: Soliciting Comments on Updates to the NOS Operational Forecast System (OFS) Framework Version and the Implementation of the Oceanographic Forecast Modeling Systems for the Salish Sea and Columbia River through June 6, 2024
• May  3: PNS24-33: National Weather Service (NWS) Directives System URL Change: Effective on or about June 3, 2024
• Sep 16: PNS23-59 Updated: Soliciting Comments through December 31, 2024 on the Experimental NWS Translation Website
• Apr 25: PNS24-32: Hurricane Threats and Impacts (HTI) Mosaic Testing on April 25, 2024
• Apr 22: PNS22-41 Updated: Soliciting Comments through October 31, 2024 on Expansion of Experimental Surf Forecast Matrix to 7 WFOs
• Apr 22: PNS24-31 Updated: Soliciting Comments on Experimental HeatRisk Grids in the National Digital Forecast Database (NDFD) and WPC HeatRisk CONUS Viewer through September 30, 2025
• Apr 18: PNS24-30: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on April 25, 2024
• Apr 18: PNS24-29: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on April 23, 2024
• Apr 16: PNS24-28: WFO Fairbanks NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tornado Warning on May 1, 2024
• Apr 15: PNS24-27: Soliciting Public Comments until May 16, 2024 on the Proposed Decommissioning of the NOAA Profiler Network (NPN)
• Apr 11: PNS24-26: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Troy Municipal Airport, Troy, AL (KTOI) through May 7, 2024
• Apr 11: PNS24-25: Hurricane Threats and Impacts (HTI) Mosaic Testing on April 11, 2024 and April 25, 2024
• Sep 25: PNS22-42 Updated: Soliciting Comments on the Experimental Flood Hazard Outlook (FHO) Product through June 30, 2025
• Apr  1: PNS24-24: Soliciting Comments on Prototype Period for Fire Detection and Monitoring until November 1, 2024
• Mar 29: PNS24-23: Soliciting Comments on the Experimental Weeks 3-4 Mean North American 500 Millibar Height Outlook through June 26, 2024
• Mar 15: PNS24-22: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on March 31, 2024
• Mar 15: PNS24-21: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on March 19, 2024
• Mar 15: PNS24-20: Alaska NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tsunami Warning on March 27, 2024 at 10:20 AM AKDT
• Mar 11: PNS24-19: NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tsunami Warning by the Eureka, California Weather Forecast Office (WFO) on March 27, 2024 at Approximately 11:00 AM PDT
• Mar 11: PNS24-18: Soliciting Public Comments through April 11, 2024 on the Proposal to Limit Tropical Information in High Seas Forecasts from 120 Hours to Only the First 48 Hours
• Mar 5: PNS24-17: Indiana Statewide NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tornado Warning on Tuesday, March 12, 2024 at 10:15 AM EDT
• Mar  1: PNS24-16: NOAA Weather Radio All Hazards (NWR) Service Termination from Station WXM88, Waynesboro, Georgia: Effective Immediately
• Feb 29: PNS24-15: Soliciting Comments on the Experimental Deployment of an Update to the Electric Power Dashboard Webpage through March 30, 2024
• Feb 28: PNS24-14: Soliciting Comments on the Removal of Certain Products from the Air Quality Model (AQM) Version 7 through March 28, 2024
• Feb 27: PNS24-13: Soliciting Comments on Experimental Spanish-Translated Tropical Cyclone Products from the National Hurricane Center (NHC) through November 30, 2024
• Feb 23: PNS24-12: Soliciting Public Comments on Potential Changes to the Real Time Ocean Forecast System (RTOFS) through March 27, 2024
• Feb 23: PNS24-11: Soliciting Comments on the Proposed Upgrade of LAMP and Gridded LAMP Guidance and the Discontinuation of Web Station Plots through March 25, 2024
• Feb 21: PNS24-10: Kentucky Statewide NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tornado Warning on March 6, 2024 at 10:07 AM EST
• Feb 15: PNS24-09: WFO Fairbanks NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Flash Flood Warning on February 28, 2024
• Feb 14: PNS24-08: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on February 22, 2024
• Feb 14: PNS24-07: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on February 20, 2024
• Feb 12: PNS24-06: Soliciting Comments on Proposed Termination of the Day 3-7 Hemispheric Charts through April 12, 2024
• Feb 7: PNS24-05: Soliciting Public Comments on the Proposed Upgrades of Hurricane Analysis and Forecast System (HAFS) Version-2 through March 11, 2024
• Feb  1: PNS24-04: Soliciting Comments through March 6, 2024 on Proposed Changes to the OPC 24-Hour Surface and Wind and Wave Forecast Charts, the 24-Hour Wind and Wave Forecast Chart, and 24-Hour Surface Chart
• Jan 18: PNS24-03: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on January 25, 2024
• Jan 18: PNS24-02: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on January 23, 2024
• Jan 16: PNS24-01: Enforcement of Geographical Boundaries in the Atlantic and Eastern North Pacific Tropical Weather Discussions from the National Hurricane Center’s Tropical Analysis and Forecast Branch: Effective on or around May 15, 2024

Public Information Statements 2023

• Dec 19: PNS23-66 Updated: Scheduled National Tsunami Warning Center Routine Communications Test for the East and Gulf Coast on December 19, 2023 Canceled
• Dec 19: PNS23-70: Soliciting Comments until January 19, 2024 on discontinuing the Texas/Oklahoma Panhandles Supplementary Observations (AGO) Product
• Dec 18: PNS23-69: Soliciting Comments through January 18, 2024 on Extending the 34- and 50-kt Wind Radii Forecasts Operationally from 3 Days to 5 Days in the Tropical Cyclone Forecast/Advisory Product (TCM)
• Dec 12: PNS23-68: Soliciting Comments on the Experimental Hawaiian Extended Range Forecast Webpage until January 12, 2024
• Dec  6: PNS23-67: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on December 21, 2023
• Dec 19: PNS23-66 Updated: Scheduled National Tsunami Warning Center Routine Communications Test for the East and Gulf Coast on December 19, 2023 Canceled
• Nov 16: PNS23-63 Updated: Soliciting Comments through December 5, 2023 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Southern Region Offices
• Nov 16: PNS23-65: Soliciting Comments through December 15, 2023 Regarding Evaluation of National Water Prediction Service (NWPS) Website
  Proposed to Replace the Advanced Hydrologic Prediction Service (AHPS) Website
• Nov 14: PNS23-64: Soliciting Comments on the Experimental Caribbean and Central American Rainfall Graphic through November 30, 2025
• Nov 16: PNS23-63 Updated: Soliciting Comments through December 5, 2023 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Southern Region Offices
• Oct 16, 2024: PNS22-10 Updated: Soliciting Comments until May 31, 2025 on Snow Ratio Grids as an Experimental Element in the National Digital Forecast Database (NDFD)
• Nov  6: PNS23-62: Commencement of Operational Test and Evaluation (OT&E) for the Replacement Temperature and Dew Point Sensor for the Automated Surface Observing System (ASOS) during November 2023
• Nov  1: PNS23-61: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on November 9, 2023
• Nov  1: PNS23-60: National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast to Take Place on November 7, 2023
• Oct 30: PNS22-18: Updated: Weather Forecast Office (WFO) Guam to Produce Experimental Public and Marine Grids for East and West Micronesia for Inclusion into the National Digital Forecast Database: Effective March 29, 2022
• Feb 6, 2025: PNS23-59 Updated: Soliciting Comments through December 31, 2025 on the Experimental NWS Translation Website
• Oct 25: PNS23-58: The Slidell, Louisiana WSR-88D is to be Decommissioned on or about November 27, 2023 in Preparation for Relocation to Hammond, Louisiana
• Oct 23: PNS23-57: Soliciting Comments through December 31, 2023 on Experimental Deployment of Updated Solar Cycle Prediction Product Webpage
• Oct 20: PNS19-02 Updated: Soliciting Comments until April 30, 2024 on Availability of Probabilistic Snow Grids for Select Weather Forecast Offices (WFOs) as an Experimental Element in the National Digital Forecast Database (NDFD) for the Contiguous United States (CONUS)
• Oct 20: PNS14 Updated: Soliciting Comments until April 30, 2024 on the Continuation of the Probabilistic Winter Precipitation Forecast Experiment
• Oct 19: PNS23-56: Soliciting Public Comments through November 18, 2023 on the Proposed Termination of Certain Web Graphics Being Produced by EMC
• Oct 15, 2024: PNS21-68: Updated: Soliciting Comments on the Experimental Standardized Weather Forecast Office (WFO) Avalanche Weather Webpage at 18 WFOs through April 30, 2026
• Oct 7, 2024:  PNS19-36: Updated: Soliciting Comments on Experimental Winter Storm Outlook through May 15, 2026
• Sep 28: PNS23-17 Updated: Soliciting Comments on Upgrading the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0 through October 28, 2023
• Sep 26: PNS23-55 Updated: Soliciting Comments on Experimental Flood Inundation Mapping (FIM) Services through September 30, 2024
• Sep 13: PNS23-54: Soliciting Comments through October 13, 2023 on the Proposed Upgrade of the North American Ensemble Forecast System (NAEFS) from Version 6 to Version 7
• Sep  5: PNS23-53: Soliciting Comments through October 5, 2023 on Experimental Storm Prediction Center (SPC) Day 1 Convective Outlook with Severe Timing Guidance and Graphic Displays
• Sep  1: PNS23-52: Soliciting Comments through November 30, 2023 on the Issuance of the Experimental Modernized Drought Information Statement (DGT) through Weather Forecast Office (WFO) “Drought Information Statement” Webpages and in PDF Format
• Aug 31: PNS23-51: Information to Assist Users Migrating to NWS-Direct Sources of NWS Common Alerting Protocol (CAP) Messages, Effective on or after July 20, 2023 
• Aug 23: PNS23-50: Anchorage, AK Federal Building Power Outage Will Affect some NWS Operational Data from August 25 to August 28, 2023
• Aug 17: PNS23-49: Soliciting Comments on Transition to Plain Language Headlines within NWS Alerting System through September 17, 2023
• Aug 15: PNS23-48: National Data Buoy Center (NDBC) will be Disestablishing Twelve Tropical Atmosphere Ocean (TAO) Array Stations in Accordance with the Recommendations of the Tropical Pacific Observing System 2020 Final Report: Beginning 2023
• Aug 10: PNS23-47: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on August 17, 2023
• Aug 10: PNS23-46: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on August 15, 2023
• Aug  1: PNS22-56 Updated: Soliciting Comments through January 31, 2024 for the Experimental Global Tropics Hazards Outlook for Week-3
• Jul 28: PNS23-45: Soliciting Comments on an Upgrade of the National Blend of Models through August 31, 2023
• Jul 24: PNS23-44: NWS Dissemination GIS Status Message – AWIPS Basemap Shapefile Configuration: Effective September 1, 2023
• Jul 13: PNS23-43: Soliciting Comments on the Upgrade of the Surge and Tide Operational Forecast System (STOFS) to Version 2.0.0 through September 27, 2023
• Jun 30: PNS23-42: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on July 13, 2023
• Jun 30: PNS23-41: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on July 11, 2023
• Jun 16: PNS23-40: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on June 21, 2023
• Jun 16: PNS23-39: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on June 20, 2023
• Jun 1: PNS23-38: Soliciting Comments on the Proposed Upgrade of the Ultraviolet Index (UVI) Forecast through June 30, 2023
• May 15: PNS23-37: Soliciting Comments on the Display of Future Plain Language Headlines to Replace “Advisory” through June 16, 2023
• May 15: PNS23-36: Soliciting Comments on Removing 1 Degree Fleet Numerical Meteorology and Oceanography Center Data from the North American Ensemble Forecast System through June 14, 2023
• May 12: PNS23-35: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on May 23, 2023
• May 12: PNS23-34: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on May 25, 2023
• May 12: PNS23-33: National Tropical Cyclone Watch Warning Product (TCV) Collaboration Testing May 15-19, 2023
• May 10: PNS23-32: Soliciting Comments on Potential Decommissioning of the User-Defined Area Forecast Service and Webpage through July 30, 2023
• May 10: PNS23-31: Soliciting Comments on Potential Decommissioning of the NWS Enhanced Data Display (EDD) through July 30, 2023
• May 9: PNS23-30 REMINDER: Comments Sought by June 4, 2023 on National Weather Service Service Description Document v2.0 for Impact-based Decision Support Services
• Apr 28: PNS23-29: Soliciting Public Comments through May 30, 2023 on Proposed Changes to Alaska Aviation Weather Unit (AAWU) Area Forecast (FA) Issuance Times
• Apr 28: PNS23-28: Soliciting Public Comments on the Proposed Termination of Certain Web Graphics Being Produced by EMC through May 28, 2023
• Apr 27: PNS21-02 Updated: Soliciting Comments on the Experimental National Hydrologic Discussion through June 30, 2024
• Sep 25, 2024: PNS22-42 Updated: Soliciting Comments on the Experimental Flood Hazard Outlook (FHO) Product through June 30, 2025
• Sep 25, 2024: PNS22-43 Updated: Extending Comment Period on the National Water Center's Experimental Area Hydrologic Discussion Product through June 30, 2025
• Apr 25: PNS23-27: Changes to ‘Alaska Weather’ Television Program: Effective July 1, 2023
• Apr 21: PNS23-26: Soliciting Public Comments on Removing Global Forecast System (GFS) Wave Products from the EMC FTP Server through May 21, 2023
• Apr  5: PNS23-25: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on April 13, 2023 in Conjunction with the PACIFEX23 Tsunami Exercise
• Apr  5: PNS23-24: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on April 11, 2023
• Apr  4: PNS23-23: Soliciting Comments on the Experimental Deployment of the US-Canada 1D Geoelectric Model through May 4, 2023
• Apr  4: PNS23-22: Soliciting Comments on Proposed Changes to the Format and Delivery of NWS High Seas Forecast Information through May 4, 2023
• Apr 4: PNS23-21: Comments Sought by June 4, 2023 on National Weather Service Service Description Document v2.0 for Impact-based Decision Support Services
• Mar 27: PNS23-20: Soliciting Comments on Proposed Upgrades to the P-ETSS and ETSS Models through April 26, 2023 
• Mar 22: PNS23-19: Soliciting Comments on Proposed Changes to NWS Tropical Cyclone Watch/Warning Text Products Issued By Local Weather Forecast Offices through June 8, 2023
• Mar 22: PNS23-18: Soliciting Comments on Proposed Changes to NWS Coastal/Lakeshore Flood and Storm Surge Products and Services through June 8, 2023
• Sep 28: PNS23-17 Updated: Soliciting Comments on Upgrading the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0 through October 28, 2023
• Mar 16: PNS23-16: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on March 31, 2023
• Mar  1: PNS23-15: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast in Conjunction with the LANTEX23 Tsunami Exercise on March 2, 2023
• Feb 28: PNS23-14: Soliciting Comments on Prototype NWSChat 2.0 Application through April 3, 2023
• Feb 23: PNS23-13: Soliciting Public Comment on the Upgrade of the Whole Atmosphere Model-Ionosphere Plasmasphere Electrodynamics Model (WAM-IPE) Forecast System (WFS) to Version 1.2 through March 24, 2023
• Feb 22: PNS23-12: Soliciting Comments on the Proposed Discontinuation of the Marine Service Chart MSC-15 through March 27, 2023
• Feb 17: PNS23-11: Soliciting Comments through March 19, 2023 on the Proposed Removal of AutoNowCaster Products from the Multi-Radar, Multi-Sensor Application
• Feb 15: PNS23-10: Soliciting Comments on Discontinuing the Alaska Recreational River Forecast (RVRAK) until March 17, 2023
• Feb 15: PNS23-09: Soliciting Comments on Updates to Graphical Flood Products in Alaska until March 17, 2023
• Feb 10: PNS23-08: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast on February 24, 2023
• Feb 10: PNS23-07: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on February 21, 2023
• Feb 6: PNS23-06: Soliciting Comments on the Upgrade of the National Water Model to Version 3.0 through March 28, 2023
• Jan 25: PNS22-11 Updated: Soliciting Comments on Experimental Excessive Rainfall Outlook for Days 4-5 through February 26, 2023
• Jan 25: PNS23-05: Soliciting Comments on Discontinuing the Forecasts of High Pressure Systems in the High Seas Text Forecasts Issued by WFO Honolulu, Hawaii and the Ocean Prediction Center through February 27, 2023
• Jan 12: PNS23-04: Soliciting Comments on the Proposed Termination of the River and Lake Forecast Product (RVD) through February 23, 2023
• Jan 10: PNS23-03: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on January 19, 2023
• Jan 10: PNS23-02: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on January 17, 2023
• Jan 9: PNS23-01: Description of Known Issues and More Details Regarding Upgrade of the Surge and Tide Operational Forecast System (STOFS, Formerly ESTOFS) to Version 1.1.1: Effective January 10, 2023 

For older PNSs, SCNs and TINs, go to https://www.weather.gov/notification/archive

_______________________________________________________________________________________________________________________

Service Change Notices 2026

• Feb 11: SCN26-14: Updated: Implementation of Updated Wireless Emergency Alerts Messages for NWS Tsunami Warnings or around March 19, 2026
• Feb 10: SCN26-08: Updated: URL change for WPC FTP over HTTPS site https://www.ftp.wpc.ncep.noaa.gov/ on or around March 3rd, 2026
• Feb 10: SCN26-13: Experimental Modernized Hydrologic Outlook (ESF) and River Summary (RVA) for Alaska Spring River Ice Breakup will transition to operational status on March 12, 2026
• Feb 09: SCN26-12: Notification of Upgrading the Climate Data Assimilation System (CDAS) to the Conventional Observation Reanalysis (CORe) Effective March 9, 2026
• Feb 03: SCN25-93: Updated: Changes to Fire Forecast Zones for WFO Eureka, CA effective March 3, 2026
• Jan 29: SCN26-11: Upcoming Changes to Storm Prediction Center (SPC) Day 1, 2, and 3 Convective Outlook Forecasts on or about March 2, 2026
• Jan 29: SCN26-10: Format change of the Space Weather Prediction Center  (SWPC) 45-day Ap and F10.7cm Flux Forecast effective March 1,  2026
• Jan 28: SCN26-09: Removal of the Aviation Weather Center's (AWCs) Rapid- Refresh-Based Inflight Icing (IFI) product from the National Blend Of Models (NBM) effective March 2, 2026
• Jan 28: SCN26-08: URL change for WPC FTP over HTTPS site https://www.ftp.wpc.ncep.noaa.gov/ on or around March 3, 2026
• Jan 26: SCN26-07: Updated: Update of Multi-Radar Multi-Sensor (MRMS) to version 12.3.1. Effective February 4, 2026
• Jan 22: SCN26-07: Update of Multi-Radar Multi-Sensor (MRMS) to version 12.3.1. Effective January 31, 2026
• Jan 22: SCN26-06: Changes to Alaska Aviation Weather Unit Surface and Significant Weather charts starting on or after February 22, 2026
• Jan 16: SCN26-05: Implementation of the Weeks 3-4 Temperature and Precipitation Greater Hawaiian Islands Forecast Web Page on February 17, 2026
• Jan 14: SCN26-04: Implement change in coverage areas for the High Seas Text Forecast near the Equator and International Dateline effective February 17, 2026
• Jan 14: SCN26-03: Termination of File Transfer Protocol (FTP) service for madis-data.ncep.noaa.gov on or around April 21, 2026
• Jan 12: SCN25-94: Updated: Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective March 3, 2026
• Jan 12: SCN26-02: Termination of Fire Danger Rating System (NFDRS) Forecast (FWM) and all derived products on January 26, 2026
• Jan 09: SCN26-01: The Addition of Experimental Probabilistic Hazard Information to the 8- to 14-day Hazards Outlook (Contiguous U.S. and Alaska) will transition to operational status on or about February 10, 2026
• Jan 07: SCN25-80: Updated: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective March 2, 2026
• Jan 07: SCN25-94: Updated: Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective March 3, 2026.

Service Change Notices 2025

• Dec 22: SCN25-103: Extending the Terminal Aerodrome Forecast (TAF) Validity Period at Nashville International Airport (KBNA) from 24 hours to 30 hours effective January 27, 2026 
• Dec 19: SCN25-102: Changes to Atlantic Marine Forecast Zones for the Ocean Prediction Center effective March 3, 2026
• Dec 19: SCN25-101: Changes to Marine Zones for NWS Weather Forecast Offices From Caribou, ME to Charleston, SC Effective March 3, 2026
• Dec 19: SCN25-100: Changes to Public and Fire Forecast Zones for WFO Tulsa, OK effective March 3, 2026
• Dec 19: SCN25-99: Changes to Public and Marine Weather Zones for NWS Weather Forecast Office New Orleans/Baton Rouge, LA, effective March 3, 2026
• Dec 19: SCN25-98: Changes to Public, Fire Weather, and Marine Forecast Zones for NWS Weather Forecast Office Charleston, SC effective March 3, 2026
• Dec 19: SCN25-97: Changes to Public, Fire, and Marine Forecast Zones for WFO Wakefield, VA, effective March 3, 2026
• Dec 19: SCN25-96: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS)for Arapahoe County, Colorado effective on March 3, 2026
• Dec 19: SCN25-95: Changes to Public Forecast Zones for WFO Bismarck, ND, effective March 3, 2026
• Dec 19: SCN25-94: Updated: Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective March 3, 2026
• Dec 19: SCN25-93: Updated: Changes to Fire Forecast Zones for WFO Eureka, CA effective March 3, 2026
• Dec 19: SCN25-92: Changes to Public Forecast Zones for WFO Eureka, CA, effective March 3, 2026
• Dec 19: SCN25-91: Changes to Public Forecast Zones for WFO Las Vegas, NV effective March 3, 2026
• Dec 19: SCN25-90: Changes to Public and Fire Forecast Zones for WFO Sacramento, CA effective March 3, 2026
• Dec 16: SCN25-81: Updated: Consolidation of Data Subsetting Services via Termination of OpenDAP Format Files on nomads.ncep.noaa.gov Effective: February 23, 2026
• Dec 11: SCN25-67: Updated: Radar Operations Center Testbed Configuration Identifier Changes: Effective on or about September 29, 2025
• Dec 11: SCN25-88: Updated: Operational implementation of the Marine Weather Message for WFO Juneau beginning January 8, 2026
• Dec  9: SCN25-89: Implementation of the Artificial Intelligence Global  Forecast System (AIGFS), Artificial Intelligence Global Ensemble  Forecast System (AIGEFS), and the Hybrid Global Ensemble  Forecast System (HGEFS): Effective December 17, 2025
• Dec  8: SCN25-88: Updated: Operational implementation of the Marine Weather Message for WFO Juneau beginning January 8, 2026
• Dec  8: SCN25-88: Updated: Operational implementation of the Marine Weather Message for WFO Juneau beginning January 8, 2026
• Dec  8: SCN25-87: Removal of the North American Rapid Refresh-Time Lagged Ensemble (NARRE-TL) System and Environmental Model Center NARRE- TL Verification, Extra Tropical Cyclone Tracker, and legacy Real-Time Ocean Forecast System Verification Websites Effective on or about January 7th, 2026
• Dec  5: SCN25-86: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Tucumcari Municipal Airport in Tucumcari, NM (KTCC) effective February 19, 2026
• Dec  5: SCN25-85: Field Test of Staggered Pulse Repetition Time (SPRT) on or around January 1, 2026
• Dec  4: SCN25-84: Termination of UKMET Data on the Satellite Broadcast Network: Effective December 8, 2025
• Dec  4: SCN25-80: Updated: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective Feb 2, 2026
• Dec  3: SCN25-83: Updated: Discontinuation of the condensed versions of offshore marine forecast products on January 6, 2026
• Dec  2: SCN25-83: Updated: Discontinuation of the condensed versions of offshore marine forecast products on January 6, 2026
• Dec  2: SCN25-82: Termination of NCEP Model Data Service FTPPRD Effective: Feb 23, 2026
• Dec  2: SCN25-81: Consolidation of Data Subsetting Services via Termination of OpenDAP Format Files on nomads.ncep.noaa.gov Effective: January 20, 2026
• Nov 18: SCN25-80: Updated: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective March 2, 2026
• Nov 17: SCN25-79: Changes to the Weather Prediction Center Days 3-7 Surface Progs Issuance Times Effective on or about December 17, 2025
• Nov 17: SCN25-78: Transfer of Terminal Aerodrome Forecast (TAF) Responsibility for Westfield-Barnes Regional Airport (KBAF) to the United States Air Force (USAF): Effective 1700 UTC December 16, 2025
• Nov  6: SCN25-77: Discontinuation of stratospheric temperature and wind forecast graphics on or about December 15, 2025
• Oct 30: SCN25-76: Changes to International Operational Meteorological (OPMET) Data Distribution on or about December 3, 2025
• Oct 29: SCN25-73: Updated: Decommissioning of the Alerts Webpage Effective December 2, 2025
• Oct 20: SCN25-75: Operational Implementation of Changes to the WIS 2.0 Global Broker on or about October 28, 2025
• Oct  09: SCN25-62: Updated: Changes and additions to LAMP station-based and gridded guidance effective October 9, 2025
• Sep 24: SCN25-66: Updated: Probabilistic Rip Risk, Wave Runup data, and Spectral point outputs moving to NOMADS: Effective October 15, 2025
• Sep 23: SCN25-74: Operational Implementation of Enhancements to the Probabilistic Winter Storm Severity Index on October 23, 2025
• Sep 18: SCN25-73: Updated: Decommissioning of the Alerts Webpage Effective December 2, 2025
• Sep 17: SCN25-72: Operational Implementation of Changes to the Winter Storm Severity Index on or about October 17, 2025
• Sep 16: SCN25-71: Volcano Observatory Notification for Aviation (VONA) to be transmitted via the Aeronautical Fixed System (AFS) beginning in November 2025
• Sep 16: SCN25-70: Termination of Terminal Aerodrome Forecast (TAF) Service for Las Vegas Municipal Airport in Las Vegas, NM (KLVS) effective December 2, 2025
• Sep  3: SCN25-69: Upgrade to National Blend of Models (NBM) Tropical 10m Wind Speed/Wind Direction grids: Effective September 2, 2025
• Sep  3: SCN25-68: Deprecating TLS 1.1: Effective October 6, 2025
• Aug 29: SCN25-67: Radar Operations Center Testbed Configuration Identifier Changes: Effective on or about September 29, 2025
• Aug 22: SCN25-59: Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective Immediately
• Aug 22: SCN25-66: Updated: Probabilistic Rip Risk, Wave Runup data, and Spectral point outputs moving to NOMADS: Effective October 15, 2025
• Aug 22: SCN25-51: Updated: Update for ObsProc Observation processing for  GFS, GDAS and NAM: Effective Immediately
• Aug 22: SCN25-65: Extending the Terminal Aerodrome Forecast (TAF) Validity Period at Kona Airport (PHKO) and Kahului Airport (PHOG) from 24 hours to 30 hours: Effective October 15, 2025
• Aug 21: SCN25-64: Updated: Upgrade to Wind Tropical Cyclone forecast Message v 1.11 Effective Immediately
• Aug 18: SCN25-63: Updated: Minor RTMA Upgrade to Version 2.10.10: Effective August 26, 2025
• Aug 13: SCN25-64: Upgrade to Wind Tropical Cyclone forecast Message v 1.11 Effective Immediately
• Aug 13: SCN25-63: Minor RTMA Upgrade to Version 2.10.10: Effective August 19, 2025:
• Aug 12: SCN25-62: Updated: Changes and additions to LAMP station-based and gridded guidance effective October 9, 2025
• Aug 12: SCN25-61: Decommissioning of the Radar Level II Monitoring Website: Effective October 7, 2025
• Aug 7: SCN25-55: Updated: Terminal Aerodrome Forecast (TAF) Service for Talladega Municipal Airport in Talladega, AL (KASN) effective October 22, 2025
• Aug 7: SCN25-60: The Weeks 3-4 Temperature and Precipitation Outlooks will change from two-category to three-category on or about October 3, 2025
• Aug  1: SCN25-59: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective August 19, 2025
• Aug  1: SCN25-58: Weather Surveillance Radar-1988 Doppler (WSR-88D) RDA/RPG Build 24.0 Beta Test to Begin the Week of September 8, 2025
• Jul 30: SCN25-57: Probabilistic Extra-Tropical Storm Surge (P-ETSS) model upgrade: Effective September 2, 2025
• Jul 30: SCN25-56: Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for National Weather Service (NWS) Honolulu Forecast Office (HFO): Effective September 2, 2025
• Jul 29: SCN25-55: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Talladega Municipal Airport in Talladega, AL (KASN): Effective October 15, 2025
• Jul 22: SCN25-47: Updated: Upgrade of the Real-Time Ocean Forecast System (RTOFS) to Version 2.5: Effective July 29, 2025
• Jul 22: SCN25-48: Updated: Upgrade to Hurricane Analysis and Forecast System (HAFS) to version 2.1: Effective July 29, 2025
• Jul 17: SCN25-54: Change in Product Issuance Times and Frequency for Weather Prediction Center Medium Range Products and Climate Prediction Center 8-14 Day Hazards Outlook: Effective August 20, 2025
• Jul 16: SCN25-46 Updated: Upgrade of Multi-Radar Multi-Sensor (MRMS) to version 12.3: Effective on August 5, 2025
• Jul 15: SCN25-53: Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to version 6.0.4 Effective August 20, 2025
• Jul 15: SCN25-52: Upgrades to the Alaska Aviation Weather Unit Winds Aloft and Hourly Observation Charts on or after August 14, 2025
• Jul 10: SCN25-51: Update for ObsProc Observation processing for GFS, GDAS and NAM, Effective August 11, 2025
• Jul 03: SCN25-50: Prototype Fire Detection and Monitoring will Transition to Operational Status on or about July 11, 2025
• Jun 26: SCN25-49: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Bryce Canyon Airport in Bryce, UT (KBCE) effective September 16, 2025
• Jun 24: SCN25-48: Updated: Upgrade to Hurricane Analysis and Forecast System (HAFS) to version 2.1: Effective July 29, 2025
• Jun 24: SCN25-47: Updated: Upgrade of the Real-Time Ocean Forecast System (RTOFS) to Version 2.5: Effective July 29, 2025
• Jun 23: SCN25-46 Updated: Upgrade of Multi-Radar Multi-Sensor (MRMS) to version 12.3: Effective on August 5, 2025
• May 29: SCN25-45: Discontinuation of stratospheric temperature and height products derived from the NESDIS retrieval soundings of the Advanced Microwave Sounding Unit (AMSU) on board the NOAA Polar Orbiting Environmental Satellites (POES) on June 15, 2025
• May 22: SCN25-44: Upgrade NWS API Website forecast and alerts endpoints Effective: May 22, 2025
• May 22: SCN25-32 Updated: Upgrade to SPC post processing for NCEP models, Effective May 27, 2025
• May 21: SCN25-43: Changes to U.S. Volcanic Ash Advisory Center Advisories no later than November, 27, 2025
• May 19: SCN25-32 Updated: Upgrade to SPC post processing for NCEP models, Effective May 27, 2025
• May 19: SCN25-34 Updated: Upgrade of National Blend of Models guidance effective May 27, 2025 
• May 12: SCN25-42: NCEP Central Operations (NCO) Upper Air Thanks Webpage URL Change: Effective on or about 1200 UTC May 19, 2025
• May 07: SCN25-41: Implementation of Terminal Aerodrome Forecast (TAF) Service for Auburn University Regional Airport in Auburn, AL (KAUO) effective July 30, 2025
• May 06: SCN25-40: Addition of Central Pacific Tropical Cyclone Genesis Information into the Eastern Pacific Tropical Weather Outlook on or around June 1, 2025
• Apr 30: SCN25-39: Weather Forecast Offices Fairbanks and Juneau, AK To Begin Issuing Heat Advisories on or about June 2, 2025
• Apr 29: SCN25-38: Discontinuation of the Daily Climate Report (CLISTO),  Preliminary Monthly Climate Data (CF6STO) and Monthly Weather  Summary (CLMSTO) for Sacramento City at WFO Sacramento, CA (STO)  Starting on or about June 1, 2025
• Apr 25: SCN25-31 Updated: Probabilistic Tropical Cyclone Storm Surge (P- Surge) Model Upgrade: Effective May 20, 2025
• Apr 23: SCN25-37: NCEP Central Operations (NCO) Critical Weather Day (CWD) Status Webpage Update: Effective on or about 1800 UTC April 28, 2025
• Apr 17: SCN25-36: Temporary Reduction of Radiosonde Observations, from Selected Sites, Effective April 17, 2025
• Apr 16: SCN25-35: Discontinuation of HTTPS access to https://ftpprd.ncep.noaa.gov and https://ftp.ncep.noaa.gov effective May 20, 2025
• Apr 15: SCN25-34: Upgrade of National Blend of Models guidance effective May 20, 2025 
• Apr 14: SCN25-33: NCEP Central Operations (NCO) Real Time Data Monitor (RTDM) Webpage URL Change: Effective on or about 1800 UTC April  15, 2025
• Apr 11:  SCN25-32 Updated: Upgrade to SPC post processing for NCEP models, Effective May 27, 2025
• Apr 03:  SCN25-30 Updated: Operational transition of the GOES-19 satellite to become GOES-East on or after April 7, 2025
• Mar 28: SCN25-31: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Upgrade: Effective April 29, 2025
• Mar 20: SCN25-28 Updated: Changes to the Surf Zone Forecast (SRF) product for WFO Guam on April 2, 2025
• Mar 20: SCN25-26 Updated: Operational Implementation of the Addition of Most Probable Peak Intensity Tags to the Storm Prediction Center (SPC) Mesoscale Discussion on or about March 25, 2025
• Mar 18: SCN25-30: Operational transition of the GOES-19 satellite to become GOES-East on April 4, 2025.
• Mar 17: SCN25-18 Updated: Additions and Changes to the station time series BUFR station lists for the GFS, RAP, and HRRR: Effective March 25, 2025.
• Mar 17: SCN25-29: Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to version 5.1.1 Effective March 26, 2025.
• Mar 14: SCN23-09 Updated: NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
• Mar 13: SCN25-28 Updated: Changes to the Surf Zone Forecast (SRF) product for WFO Guam on April 2, 2025
• Mar 13: SCN25-27: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Anniston Regional Airport in Anniston, AL (KANB) effective May 27, 2025
• Mar 12: SCN25-26 Updated: Operational Implementation of the Addition of Most Probable Peak Intensity Tags to the Storm Prediction Center (SPC) Mesoscale Discussion on or about March 25, 2025
• Mar 05: SCN25-25: Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model  Implementation of Updated Naming Conventions per Executive Order  14172: Effective March 12, 2025
• Mar 04: SCN25-24: Changed codes in the Weather Prediction Center (WPC) Mesoscale Precipitation Discussion (FFGMPD): Effective on or
  about May 19, 2025
• Feb 27: SCN25-23: Operational Implementation of Updated Solar Cycle 25 Prediction Product: Effective March 31, 2025
• Feb 26: SCN25-22: Migration of the Tropical Weather Summary Information from Text Product Format to hurricanes.gov: Effective on or about May 15, 2025
• Feb 25: SCN25-21: Changes to National Weather Service (NWS) Shapefiles per Executive Order 14172: Effective February 24, 2025
• Feb 24: SCN25-20: Termination of the Weather Activity Planner: Effective Immediately
• Feb 24: SCN25-19: GLERL Adjustment to be Disabled in URMA as Part of the obsproc v1.2.3 Upgrade: Effective on or about March 24, 2025
• Feb 20: SCN25-18 Updated: Additions and Changes to the station time series BUFR station lists for the GFS, RAP, and HRRR: Effective March 25, 2025.
• Feb 20: SCN25-17 Updated: Ceiling, Visibility, and Low Level Wind Shear (LLWS) Grids in NDFD will transition to Operational Status on March 17, 2025
• Feb 14: SCN20-80 Updated: Enhancements to the Winter Storm Severity Index (WSSI): Effective on or around March 17, 2025
• Feb 20: SCN25-17 Updated: Ceiling, Visibility, and Low Level Wind Shear (LLWS) Grids in NDFD will transition to Operational Status on March 17, 2025
• Feb 12: SCN25-16: The Experimental Hawaiian Extended Range Forecast Webpage Will Transition to Operational Status on March 12, 2025
• Feb 11: SCN24-115 Updated: Changes to Public and Fire Forecast Zones for WFO Tallahassee, FL: Effective March 18, 2025
• Feb  7: SCN25-15: Weather Surveillance Radar-1988 Doppler (WSR-88D) Kadena Air Base, Japan (RODN) Has Been Decommissioned
• Feb  6: SCN25-14: Deployment of Preliminary GOES-19 Compact Coronagraph Images and Animations on or about February 6, 2025
• Feb  4: SCN24-70 Updated: Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective March 18, 2025
• Jan 31: SCN25-13: Upgrade to GOES-R Enterprise Rain Rate Algorithm on SBN on or about March 3, 2025
• Jan 30: SCN25-12: Replacing the Imperial Unit Feet with the Metric Unit Meter in National Marine Center High Seas Text and Graphical Products on or about May 15, 2025
• Jan 30: SCN25-11: Discontinuation of the Intermediate (IM) Daily Climatological Report (CLICYS) and Rescheduling of the Issuance Time for the Evening (PM) Daily Climatological Report at WFO Cheyenne, WY (CYS): Starting on or about March 1, 2025
• Jan 28: SCN25-10: Migration of tsunami.gov Website to a New Server Platform on or about February 10, 2025
• Jan 27: SCN25-09: Enforce TLS 1.2 or Higher on NCEP Hosted Sites: Effective July 8, 2025
• Jan 22: SCN25-08: Changes to the Post Tropical Cyclone Report (PSH) to Identify Top Wind Gusts: Effective on or about May 15, 2025
• Jan 22: SCN25-07: NWS is Changing the Issuance Criteria for Tropical Cyclone Advisory Products for Potential Tropical Cyclones: Effective on or about May 15, 2025
• Jan 22: SCN25-06: NWS is Extending the 64-kt Wind Radii Forecasts to Day 3 in the Tropical Cyclone Forecast/Advisory Product (TCM): Effective on or about May 15, 2025
• Jan 16: SCN25-05: NOAA Weather Radio All Hazards (NWR) Service Termination from Station WXM82, Egremont, Massachusetts: Effective on or before February 28, 2025
• Jan 15: SCN25-04: Operational Deployment of the Global Total Electron Content (GloTEC) Ionosphere Model: Effective on or about February 18, 2025
• Jan 13: SCN25-03: Activation of Advected Layer Precipitable Water (ALPW) on the Satellite Broadcast Network on or about March 28, 2025
• Jan 8: SCN25-02: Use of Mixed-Case Text/95 ASCII Character Set in the NWS Weather Prediction International Desk’s Forecast Discussions: Effective February 10, 2025
• Jan  7: SCN25-01: Retirement of Select Aviation Area Forecasts (FAs): Effective January 27, 2025

Service Change Notices 2024

• Dec 23: SCN24-120: NOAA Weather Radio All Hazards (NWR) Service Termination from Station WXN81, Ulysses, Kansas: Effective on or before 12/31/2024
• Dec 23: SCN24-119: Refinements to Public and Fire Weather Forecast Zones for WFO Fairbanks, AK: Effective March 18, 2025
• Dec 23: SCN24-118: Changes to Marine Forecast Zones for WFO San Diego, CA: Effective March 18, 2025
• Dec 23: SCN24-117: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Hennepin County, Minnesota: Effective on or about March 18, 2025
• Dec 23: SCN24-116: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Boulder County, Colorado: Effective on or about March 18, 2025
• Feb 11, 2025: SCN24-115 Updated: Changes to Public and Fire Forecast Zones for WFO Tallahassee, FL: Effective March 18, 2025
• Dec 23: SCN24-114: Changes to Public and Fire Weather Zones for NWS Jacksonville, FL: Effective March 18, 2025
• Dec 23: SCN24-113: Changes to Public and Fire Forecast Zones for WFO Baltimore, MD/Washington, DC: Effective on or about March 18, 2025
• Dec 23: SCN24-112: Changes to Fire Weather Forecast Zones for WFO Boise, ID: Effective March 18, 2025
• Dec 23: SCN24-111: Changes to Marine Weather Forecast Zones for WFO Tallahassee, FL: Effective March 18, 2025
• Dec 23: SCN24-110: Refinements to Public and Fire Weather Forecast Zones for WFO Juneau, AK: Effective March 18, 2025
• Feb 4, 2025: SCN24-70 Updated: Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective March 18, 2025
• Dec 23: SCN24-69 Updated: Changes to Public Forecast Zones for WFO Seattle, WA: Effective March 18, 2025
• Dec 23: SCN24-68 Updated: Changes to Fire Weather Forecast Zones for WFO Pendleton, OR: Effective March 18, 2025
• Dec 20: SCN24-109: Discontinuation of the Max/Min Temperature and Precipitation Table Product for all NWS Central Region Offices: Effective January 31, 2025
• Dec 20: SCN24-108: Termination of the 72-Hour Low Tracks Graphic and the Non-Technical 72-Hour Low Tracks Graphic to be Replaced by Automated Low Clusters Forecast Tool: Effective January 20, 2025
• Dec 20: SCN24-107: Discontinuation of Haines Index and Lightning Activity Level (LAL) as Fire Weather Forecast Elements in Fire Weather Products: Effective on or about February 1, 2025
• Dec 18: SCN24-106 Updated: RESCINDED: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Anniston Regional Airport in Anniston, AL (KANB)
• Dec 18:  SCN24-105 Updated: Operational Implementation of Key Messages on or about January 16, 2025 
• Dec 16: SCN24-104: The Experimental Weeks 3-4 Precipitation Outlooks Will Become Operational on or about January 17, 2025
• Dec 12: SCN24-99 Updated: Addition of SAUS99 and SPUS99 Text Products to Satellite Broadcast Network (SBN) and Removal of the SAUS70, 80  and 90 Counterparts on or about January 27, 2025
• Nov 19: SCN24-103: Update to the Marine Beach Forecast Summary Service: Effective on or after December 16, 2024
• Nov 15: SCN24-102: Addition of Avalanche Warning for the San Francisco Peaks and Kachina Peaks Wilderness in Arizona beginning December 16, 2024
• Oct 29: SCN24-101: Minor RTMA and URMA Upgrade to Version 2.10.9 (RTMA) and 2.10.7 (URMA): Effective on October 29, 2024
• Oct 21: SCN24-100: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective December 9, 2024
• Dec 12: SCN24-99 Updated: Addition of SAUS99 and SPUS99 Text Products to Satellite Broadcast Network (SBN) and Removal of the SAUS70, 80  and 90 Counterparts on or about January 27, 2025
• Oct 18: SCN24-98: The Coastal Waters Forecast Product from the Weather Forecast Office (WFO) in Guam Will Include Additional Wave Information on or about November 4, 2024
• Oct 17: SCN24-97: Addition of National Fire Danger Rating System (NFDRS) Forecasts from the National Weather Service (NWS) Honolulu Forecast Office (HFO): Effective Immediately
• Oct 15: SCN24-96: Improvements Made to the World Coordinate System Metadata in GONG H-Alpha Imagery on or about October 16, 2024
• Oct 15: SCN24-95: Changes to NOAA Weather Radio All Hazards (NWR) Radio Frequency for Safford, AZ (KXI24): Effective on or about November 18, 2024
• Dec 23: SCN24-69 Updated: Changes to Public Forecast Zones for WFO Seattle, WA: Effective March 18, 2025
• Oct 1: SCN24-94: Upgrade of the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0.8: Effective October 1, 2024
• Oct 1: SCN24-93: Discontinuation of the Texas/Oklahoma Panhandles Supplementary Observations (AGO) Product: Effective October 31, 2024
• Sep 26: SCN24-92: Retirement of the Airmen’s Meteorological Information (AIRMET) over CONUS: Effective on or about January 27, 2025
• Sep 26: SCN24-91: Termination of Terminal Aerodrome Forecast (TAF) at Troy Municipal Airport, Troy, AL (KTOI): Effective on or around October 1, 2024
• Sep 24: SCN24-80 Updated: Changes and Additions to LAMP Station-based and Gridded Guidance: Effective on or about September 30, 2024
• Sep 23: SCN24-90: Changes to the Atlantic Tropical Weather Discussion Issuance Times: Effective on or about December 2, 2024
• Sep 16: SCN24-89: Upgrade of the Real Time Ocean Forecast System (RTOFS) to Version 2.4: Effective September 13, 2024
• Sep 10: SCN24-77 Updated: NOS Operational Forecast System (OFS) Framework Version Updates and Implementation of Oceanographic Forecast Modeling Systems for the Salish Sea and Columbia River: Effective on or about September 16, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• Sep 5: SCN24-88: Renaming of Excessive Heat Watch and Warning to Extreme Heat Watch and Warning: Effective March 4, 2025
• Sep 3: SCN24-87: Addition of NWS Common Alerting Protocol version 1.2 messages to NOAA Weather Wire Service Open Interface (NWWS-OI): Effective on or around September 3, 2024
• Aug 29: SCN24-75 Updated: Changes in NWS Hazard Map Warning, Watch, Advisory (WWA) Colors and Priorities: Effective October 1, 2024 
• Aug 29: SCN24-86: Implementation of TAF Service for Half Moon Bay Airport (KHAF) in California: Effective October 22, 2024
• Aug 28: SCN24-85: Updated PROB30 Usage in the Terminal Aerodrome Forecast (TAF): Effective on or about September 30, 2024
• Aug 27: SCN24-84: Two New NOAA Weather Radio All Hazards (NWR) Transmitters in the Texas Panhandle become operational: Effective on or about October 1, 2024
• Aug 27: SCN24-83: New NOAA Weather Radio All Hazards (NWR) Broadcast begins from Station WZ2559, Enterprise, Oregon: Effective on or about October 1, 2024
• Dec 23: SCN24-69 Updated: Changes to Public Forecast Zones for WFO Seattle, WA: Effective March 18, 2025
• Sep 24: SCN24-80 Updated: Changes and Additions to LAMP Station-based and Gridded Guidance: Effective on or about September 30, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• Aug 20: SCN24-72 Updated: Weather Surveillance Radar-1988 Doppler (WSR-88D) RDA/RPG Build 23.0 Beta Test to Begin the Week of August 25, 2024
• Dec 23: SCN24-68 Updated: Changes to Fire Weather Forecast Zones for WFO Pendleton, OR: Effective March 18, 2025
• Feb 4, 2025: SCN24-70 Updated: Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective March 18, 2025
• Aug 20: SCN24-82: Experimental Global Tropics Hazards Outlook for Week-3 will Transition to Operational Status on September 19, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• Aug 14: SCN24-81: Implementation of TAF Service for the South Valley Regional Airport (KSVR) in Utah: Effective October 29, 2024
• Sep 24: SCN24-80 Updated: Changes and Additions to LAMP Station-based and Gridded Guidance: Effective on or about September 30, 2024
• Aug 5: SCN24-79: Deployment of an Update to the GOES Proton Flux Plot on or about August 6, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• Aug 2: SCN24-78: The National GIS Map Viewer (the “Viewer”) Marine Program Site will become Operational: Effective on or about Monday, August 5, 2024
• Sep 10: SCN24-77 Updated: NOS Operational Forecast System (OFS) Framework Version Updates and Implementation of Oceanographic Forecast Modeling Systems for the Salish Sea and Columbia River: Effective on or about September 16, 2024
• Jul 29: SCN24-76: Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to Version 5.1: Effective July 30, 2024
• Aug 29: SCN24-75 Updated: Changes in NWS Hazard Map Warning, Watch, Advisory (WWA) Colors and Priorities: Effective October 1, 2024 
• Jul 19: SCN24-74: Initiation of an Afternoon Issuance of the Day 3 Convective Outlook, Issued by the NWS Storm Prediction Center: Effective on or about August 20, 2024
• Jul 10: SCN24-73: Change to NEXRAD Level III Product Dissemination on or around September 16, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• Aug 20: SCN24-72 Updated: Weather Surveillance Radar-1988 Doppler (WSR-88D) RDA/RPG Build 23.0 Beta Test to Begin the Week of August 25, 2024
• Jul 3: SCN24-71: Upgrade to RIDGE II (radar.weather.gov) Enhanced and Standard (Low Bandwidth) Images: Effective July 2, 2024
• Feb 4, 2025: SCN24-70 Updated: Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective March 18, 2025
• Jun 27: SCN24-65 Updated: Upgrade NCEP Global Forecast System to v16.3.16: Effective July 2, 2024
• Feb 4, 2025: SCN24-70 Updated: Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective March 18, 2025
• Dec 23: SCN24-69 Updated: Changes to Public Forecast Zones for WFO Seattle, WA: Effective March 18, 2025
• Dec 23: SCN24-68 Updated: Changes to Fire Weather Forecast Zones for WFO Pendleton, OR: Effective March 18, 2025
• Jun 26: SCN24-67: Decommissioning of w2.weather.gov on or about July 23, 2024
• Jun 24: SCN24-66: Termination of the Day 3-7 Hemispheric Charts: Effective July 24, 2024
• Jun 27: SCN24-65 Updated: Upgrade NCEP Global Forecast System to v16.3.16: Effective July 2, 2024
• Jun 13: SCN24-64: Upgrade to Hurricane Analysis and Forecast System (HAFS): Effective July 16, 2024
• Jun 1: SCN24-63: Decommissioning of the NOAA Profiler Network (NPN): Effective July 11, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• Jun 4: SCN24-44 Updated: Migrate NWS weather.gov Website to New Infrastructure and Decommission Websites/URLs: Effective June 4, 2024
• Jun 3: SCN24-50 Updated: Migration of JSON and DWML Data Services to NWS’s API Application at api.weather.gov and Removal from forecast.weather.gov: Effective TBD
• May 31: SCN24-62: Limiting Tropical Information in High Seas Forecasts from 120 Hours to Only the First 48 Hours: Effective June 26, 2024
• May 31: SCN24-61: Discontinuation of the Max/Min Temperature and Precipitation Table Product for all NWS Southern Region Offices: Effective July 1, 2024
• May 28: SCN24-60: New Data Available Publicly on NCEP Web Services: GFS, GDAS, and RAP BUFR Observations and US Navy HYCOM: Effective May 22, 2024
• May 22: SCN24-43 Updated: Migration of All Real-time LAMP and Gridded LAMP Webpages and One Storm Surge Webpage to New Web Server: Effective on or about June 10, 2024
• May 22: SCN24-59: Spot Application Upgrade: Effective June 25, 2024
• May 22: SCN24-58: NWS to Decommission the User-Defined Area Forecast (UDAF) Service and Webpage: Effective June 27, 2024
• May 21: SCN24-57: New NOAA Weather Radio All Hazards (NWR) Broadcast Begins from Station KAE42, Providence Forge, VA on June 21, 2024
• May 21: SCN24-56: National Tsunami Hazards Mitigation Program Website Will Move to New Web Address on or about June 19, 2024
• May 20: SCN24-55: Upgrade NWS API Website Forecast and Alerts Endpoints: Effective June 20, 2024
• Sep 9: SCN24-54 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about September 16, 2024
• May 16: SCN24-53: Operational Implementation of the updated Electric Power Dashboard Webpage on or about May 16, 2024
• May 16: SCN24-52: The National GIS Map Viewer (the “Viewer”) Tropical Program Site Will Become Operational: Effective on or about May 21, 2024
• May 16: SCN24-51: NWS Mobile Site Decommissioning: Effective June 26, 2024
• Jun 4: SCN24-44 Updated: Migrate NWS weather.gov Website to New Infrastructure and Decommission Websites/URLs: Effective June 4, 2024
• Jun 3: SCN24-50 Updated: Migration of JSON and DWML Data Services to NWS’s API Application at api.weather.gov and Removal from forecast.weather.gov: Effective TBD
• May 3: SCN24-49: Termination of TPEX Introduction Webpage: Effective June 13, 2024
• May 2: SCN24-40 Updated: Upgrade of the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0: Effective on or about May 14, 2024
• May 2: SCN24-48: Cooperative Hurricane Upper Air Stations (CHUAS) to Transition from the GRAW DFM09 to the GRAW DFM17 (Capless) Radiosonde and Supporting Software Version by July 27, 2024
• May 2: SCN24-47: Moving Downtown Los Angeles, CA Weather Observations Site to the Frank Hotchkin Memorial Training Center on May 20, 2024
• May 2: SCN24-46: Correcting Station Locations for KGVW and MMML in the National Blend of Models (NBM) v4.1 Text Message Product: Effective April 29, 2024
• May 1: SCN24-45: Removal of Surface Observations from NWS API Website: Effective April 24, 2024
• Jun 4: SCN24-44 Updated: Migrate NWS weather.gov Website to New Infrastructure and Decommission Websites/URLs: Effective June 4, 2024
• Apr 22: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• May 22: SCN24-43 Updated: Migration of All Real-time LAMP and Gridded LAMP Webpages and One Storm Surge Webpage to New Web Server: Effective on or about June 10, 2024
• Apr 17: SCN24-34 Updated: NOAA-21 NUCAPS Soundings to be Added to the Satellite Broadcast Network (SBN) on or near May 9, 2024
• Apr 16: SCN24-42: The “Rapid Onset Drought” Hazard Type Within the 8- to 14-Day Hazards Outlook (Contiguous U.S. and Alaska) Will Transition to Operational Status: Effective May 16, 2024
• Apr 11: SCN24-41: Upgrade of National Blend of Models Guidance: Effective May 15, 2024
• Apr 22: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• May 2: SCN24-40 Updated: Upgrade of the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0: Effective on or about May 14, 2024
• Apr 5: SCN24-39: Termination of the Hydrologic Summary (RVA): Effective April 16, 2024
• Apr 5: SCN24-38: Changes to the 24-Hour Surface and Wind and Wave Forecast Charts Issued by the Ocean Prediction Center: Effective on or around June 3, 2024
• Apr 4: SCN24-20 Updated: Provision of Full-Resolution National Digital Forecast Database (NDFD) Data and Air Quality National Digital Guidance Database (NDGD) via Amazon Web Services (AWS) Transitioning to Operational Status on or about April 17, 2024
• Apr 3: SCN24-37: Station Changes in GOES-R ASOS Satellite Cloud Products: Effective June 2, 2024
• Apr 3: SCN24-36: Upgrade to SPC Post Processing for NCEP Models: Effective May 7, 2024
• Apr 2: SCN24-35: Termination of Great Lakes Ice Concentration GRIB File: Effective May 1, 2024
• Apr 1: SCN24-32 Updated: Transition of NOAA Weather Wire Service Open Interface (NWWS-OI) to New Infrastructure: Effective April 23, 2024
• Apr 22: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• Apr 17: SCN24-34 Updated: NOAA-21 NUCAPS Soundings to be Added to the Satellite Broadcast Network (SBN) on or near May 9, 2024
• Mar 26: SCN23-44 Updated: Implementation of Consolidated NWS Public Weather Program Products Related to Cold: Effective on or about October 1, 2024
• Mar 20: SCN24-33: Minor RTMA Upgrade to Version 2.10.7: Effective on or about April 08, 2024
• Apr 1: SCN24-32 Updated: Transition of NOAA Weather Wire Service Open Interface (NWWS-OI) to New Infrastructure: Effective April 23, 2024
• Mar 20: SCN24-31: Reinstatement of Marine Local Storm Report Event Types on or about March 26th, 2024
• Mar 11: SCN24-30: Upgrade NWS Forecast and Marine Weather Websites to New Infrastructure and Decommission Spanish Translation Webpages: Effective April 30, 2024, with a 7-hour Test on April 11, 2024
• Mar 6: SCN24-29: Changes to Uniform Resource Locators (URLs) Associated with the Operational Implementation of the National Water Prediction Service (NWPS) on March 27, 2024
• Mar 4: SCN24-28: Implementation of New Interactive Text Message Response System (ITMRS) for NOAA Weather Radio All Hazards (NWR): Effective April 4, 2024
• Feb 29: SCN24-27: The Modernized Drought Information Statement Will Transition to Operational Status: Effective April 1, 2024
• Feb 27: SCN24-26: Change in Issuing Office and Product Identifiers for Spanish-Translated Tropical Weather Outlooks and Tropical Cyclone Public Advisories for the Atlantic Basin on or around May 15, 2024
• Feb 26: SCN24-25: Changes to Issuance of U.S. Tropical Watches/Warnings on Intermediate Advisories, Inclusion of Links in the Tropical Cyclone Public Advisories, and Updates to the Time Zone Referenced in the Eastern Pacific Tropical Cyclone Forecast Products: Beginning May 15, 2024
• Apr 22: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• Feb 23: SCN24-24: Changes to the host URLs for Hurricane Threats and Impacts (HTI) Graphics in Keyhole Markup Language (KML) Format: Effective Immediately
• Feb 23: SCN24-23: Changes to the Environmental Modeling Center Website with the Implementation of the Environmental Modeling Center Verification System (EVS) Version 1.0: Effective on or about March 26, 2024
• Apr 4: SCN24-20 Updated: Provision of Full-Resolution National Digital Forecast Database (NDFD) Data and Air Quality National Digital Guidance Database (NDGD) via Amazon Web Services (AWS) Transitioning to Operational Status on or about April 17, 2024
• Apr 22: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• Feb 22: SCN24-22: NWS is Extending the 34- and 50-kt Wind Radii Forecasts from 3 Days to 5 Days in the Tropical Cyclone Forecast/Advisory Product (TCM): Effective on or about May 15, 2024
• Feb 22: SCN24-21: Minor RTMA Upgrade to Version 2.10.6: Effective on or about February 26, 2024
• Apr 4: SCN24-20 Updated: Provision of Full-Resolution National Digital Forecast Database (NDFD) Data and Air Quality National Digital Guidance Database (NDGD) via Amazon Web Services (AWS) Transitioning to Operational Status on or about April 17, 2024
• Feb 21: SCN24-19: The National Centers for Environmental Prediction (NCEP) Climate Prediction Center (CPC) will Change the Depiction and Output Formats of Several Ultraviolet Index (UVI) Product Graphics on or about May 25, 2024
• Feb 14: SCN24-18: Addition of HRRR and HRRRDAS files to NOMADS/FTPPRD Web Services: Effective February 14, 2024
• Feb 14: SCN24-17: The Coastal Waters Forecast with Experimental Wave Component Detail Will Expand to All Coastal NWS WFOs and Transition to Operational in a Phased Implementation from April through May 2024
• Feb 12: SCN24-16: National Hurricane Center (NHC) Tropical Cyclone JavaScript Object Notation File Changes: Effective on or about May 15, 2024
• Feb 9: SCN24-15: Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to Version 5.0: Effective March 13, 2024
• Feb 7: SCN24-14: Metop-C NUCAPS Soundings to be Added to the Satellite Broadcast Network on or near March 8, 2024
• Feb 6: SCN24-13: The Pacific Tsunami Center Will Issue Tsunami Products with Updated Spanish Language Geographic Area Titles for Puerto Rico and the United States Virgin Islands and British Virgin Islands: Effective March 21, 2024
• Feb 6: SCN24-12: Termination of Old NWS Warnings Webpage: Effective March 5, 2024
• Jan 25: SCN24-11: Hammond, LA WSR-88D (KHDC) to Begin NEXRAD Level III Product Dissemination on or around March 31, 2024
• Jan 24: SCN24-10: The National Weather Service Began Operational Use of Inmarsat’s SafetyNET II for Broadcasts of METAREA IV and XII High Seas Forecasts and Warnings on January 22, 2024
• Jan 24: SCN24-09: Change to NEXRAD Level III Product Dissemination on or around March 4, 2024
• Jan 24: SCN24-08: Discontinuation of the 18Z issuance of the Regional Temperature and Precipitation Summary and rescheduling for 16Z on or about February 12, 2024 with COOP Reports Only
• Jan 23: SCN24-07: Aviation Tropical Cyclone Advisory (TCA) to Add a 6-hour Forecast: Beginning on or about May 15, 2024
• Jan 22: SCN23-121 Updated: alerts.weather.gov version 2.3.0 Upgrade: Effective on or about February 14, 2024
• Jan 18: SCN24-06: Discontinuing Dial-a-Buoy Interactive Voice Response System, Effective March 17, 2024
• Jan 18: SCN24-05: Automated Radiosonde Observing System (AROS) Sites to Transition from the Vaisala RS41-SGP Radiosonde to the RS41-SG Radiosonde by May 31, 2024
• Apr 22: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• Jan 16: SCN24-04: Updated Issuance Time and Format for the Tropical Weather Discussion (TWD) Issued Daily by WFO Guam: Effective on or about June 3, 2024
• Jan 12: SCN24-03: Replacement of the Advanced Hydrologic Prediction Service (AHPS) Website with the National Water Prediction Service (NWPS) Website on or about March 27, 2024
• Jan 11: SCN24-02: New Forecast Product “Offshore Waters Forecast for SW N Atlantic Ocean” Will Start on March 26, 2024
• Jan 3: SCN24-01: Approval of Service Description Document Version 2 Describing NWS Impact-based Decision Support Services: Effective January 3, 2024

Service Change Notices 2023

• Apr 22, 2024: SCN23-124 Updated: Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective May 14, 2024
• Dec 21: SCN23-123: Implementation of Terminal Aerodrome Forecast (TAF) Service for KRGA - Central Kentucky Regional Airport, Richmond, KY: Effective March 5, 2024
• Dec 21: SCN23-122: NWS Alerts Atomic Syndication Format (ATOM) Data Changes: Effective on or about January 31, 2024
• Jan 22, 2024: SCN23-121 Updated: alerts.weather.gov version 2.3.0 Upgrade: Effective on or about February 14, 2024
• Dec 21: SCN23-120: Changes to Public and Fire Weather Forecast Zones for WFO Miami, FL: Effective March 5, 2024
• Dec 21: SCN23-119: Changes to Fire Forecast Zones for WFO Fairbanks, AK: Effective March 5, 2024
• Dec 21: SCN23-118: Changes to Fire Weather Forecast Zones for WFO Honolulu, HI: Effective March 5, 2024
• Dec 21: SCN23-117: Changes to Fire Weather Zones for WFO Portland, OR: Effective March 5, 2024
• Dec 21: SCN23-116: Changes to Public Forecast Zones for WFO Portland, OR: Effective March 5, 2024
• Dec 21: SCN23-115: Changes to Public and Fire Forecast Zones for WFO Jacksonville, FL: Effective March 5, 2024
• Dec 21: SCN23-114: Changes to Pacific Offshore Marine Forecast Zone Boundaries: Effective March 5, 2024
• Dec 21: SCN23-113: Refinements to Public, Marine, and Fire Weather Forecast Zones for WFO Juneau, AK: Effective March 5, 2024
• Dec 14: SCN23-112: Minor RTMA and URMA Upgrade to Version 2.10.5: Effective on or about January 24, 2023
• Dec 14: SCN23-111: Change to Global Aviation Products Related to the World Area Forecast System (WAFS) Product on or about January 17, 2024
• Dec 5: SCN23-110: Termination of Certain Web Graphics Being Produced by EMC: Effective January 5, 2024
• Nov 28: SCN23-109: Discontinuation of the Temperature and Precipitation Summary for Deep South Texas: Effective January 9, 2024
• Nov 28: SCN23-62 Updated: Temporary Removal of Canadian Radars from the Multi-Radar Multi-Sensor (MRMS) System: Effective June 5, 2023
• Nov 16: SCN23-73 Updated: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Sonoma County, California: Effective on or after September 19, 2023
• Nov 16: SCN23-108: The Experimental Probabilistic Winter Storm Severity Index (WSSI-P) Will Become Operational on December 15, 2023
• Nov 16: SCN23-107: Discontinuation of the Experimental Lake Effect Snow (LES) Warning Polygons from NWS Weather Forecast Offices (WFOs) Buffalo, NY, Binghamton, NY and Albany, NY on or about December 16, 2023
• Nov 16: SCN23-106: Operational Implementation of Storm Prediction Center (SPC) Day 1 Convective Outlook with Severe Timing Guidance and Graphic Displays on or about December 16, 2023
• Nov 13: SCN23-105: NWS to Redirect and Decommission Enhanced Data Display: Effective November 29, 2023
• Feb 14, 2025: SCN20-80 Updated: Enhancements to the Winter Storm Severity Index (WSSI): Effective on or around March 17, 2025
• Nov 2: SCN23-104: Upgrade of the North American Ensemble Forecast System (NAEFS) to Version 7.0: Effective December 5, 2023
• Oct 25: SCN23-103: Discontinuation of the Max/Min Temperature and Precipitation Table Product for New Mexico: Effective Tuesday, December 5, 2023
• Oct 20: SCN23-93 Updated: GOES-East/West Cloud Cover Layers to be Added to the Satellite Broadcast Network on or after October 23, 2023
• Oct 19: SCN23-09 Updated: NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
• Oct 19: SCN23-102: Transition of the Radiosonde Replacement System (RRS) at Albany, NY to the 403 MHz Manual Radiosonde Observation System (MROS) on or about October 25, 2023
• Oct 16: SCN23-101: Termination of the Weather Prediction Center Day 3-7 Hazards Outlook Discussion: Effective November 15, 2023
• Oct 13: SCN23-100: Implementation of Terminal Aerodrome Forecast (TAF) Service for Durant Regional Airport – Eaker Field (KDUA), Durant OK: Effective November 1, 2023
• Oct 12: SCN23-99: Upgrade Ultraviolet Index (UVI) Forecast: Effective November 14, 2023
• Oct 6: SCN23-98: Discontinuation of the Experimental Days 3-7 Winter Storm Threat Index from NWS Weather Forecast Offices (WFOs) Baltimore, MD/Washington DC, State College, PA and Wakefield, VA on or about November 6, 2023
• Oct 2: SCN23-79 Updated: Upgrade of Aviation Weather Center Website on October 16, 2023
• Sep 28: SCN23-97: Deployment of and Update to the Kp>7 Warning to Remove the Adjectival Description on or about September 28, 2023
• Sep 28: SCN23-96: Change to NEXRAD Level III Product Dissemination on or around November 13, 2023
• Sep 28: SCN23-95: Hurricane Analysis and Forecast System Upgrades (HAFSv1.0.5): Effective October 4, 2023
• Sep 26: SCN23-94: Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model Station Post-processing Updates: Effective September 27, 2023
• Oct 20: SCN23-93 Updated: GOES-East/West Cloud Cover Layers to be Added to the Satellite Broadcast Network on or after October 23, 2023
• Sep 11: SCN23-92: New Stations Added to GOES-R ASOS Satellite Cloud Products as of August 11, 2023
• Oct 2: SCN23-79 Updated: Upgrade of Aviation Weather Center Website on October 16, 2023
• Aug 31: SCN23-61 Updated: Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images Implemented on August 24, 2023
• Aug 29: SCN23-91: NWS to Replace Digital Marine Weather Dissemination System (DMAWDS) with New Ship Weather Observation Form: Effective September 28, 2023
• Aug 29: SCN23-90: Climate Prediction Center (CPC) Operational 6-10 Day and 8-14 Day Temperature and Precipitation Outlooks Maps Will Begin Including Hawaii on or about October 3, 2023 
• Aug 18: SCN23-76 Updated: Upgrade of National Water Model on NCEP’s WCOSS System and its Post-processing Application on the Integrated Dissemination Platform (IDP): Effective September 20, 2023
• Aug 14: SCN23-89: Experimental Deployment of International Civil Aviation Organization (ICAO) Space Weather Advisories on or about August 14, 2023
• Aug 31: SCN23-61 Updated: Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images Implemented on August 24, 2023
• Aug 9: SCN23-88: WSR-88D RDA/RPG Build 22.0 Beta Test to Begin on August 14, 2023
• Aug 1: SCN23-87: Corrections to Public and Fire Weather Forecast Zones for WFO Riverton, WY: Effective September 19, 2023
• Jul 28: SCN23-86: Removal of AutoNowCaster Products from the Multi-Radar, Multi-Sensor Application: Effective September 6, 2023
• Jul 27: SCN23-85: National Data Buoy Center (NDBC) will be Modifying the File Format and Filenames of Files Available for Download via Their Website: Effective on or about August 15, 2023
• Jul 27: SCN23-84: Termination of Certain Web Graphics Being Produced by EMC: Effective August 28, 2023
• Jul 24: SCN23-83: Implementation of TAF Service for Ontario Municipal Airport (KONO), Oregon: Effective September 12, 2023
• Aug 18: SCN23-76 Updated: Upgrade of National Water Model on NCEP’s WCOSS System and its Post-processing Application on the Integrated Dissemination Platform (IDP): Effective September 20, 2023
• Jul 19: SCN23-82: Changes to NWS Common Alerting Protocol (CAP) Message Availability via the Federal Emergency Management Agency (FEMA) Integrated Public Alert and Warning System (IPAWS): Effective on or after July 20, 2023
• Jul 18: SCN23-70 Updated: The Climate Prediction Center (CPC) Operational Drought Outlooks (DOs) will Begin Including the U.S. Virgin Islands on or about August 17, 2023
• Mar 26: SCN23-44: Updated: Implementation of Consolidated NWS Public Weather Program Products Related to Cold, Effective on or about October 1, 2024
• Jul 13: SCN23-81: Removal of the Radar Coded Message 74/RCM from RPCCDS on or about August 20, 2023 
• Jul 7: SCN23-72 Updated: Changes to Public Forecast Zones for WFO El Paso, TX: Effective September 19, 2023
• Jul 7: SCN23-80: Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model Upgrade and Extra-Tropical Storm Surge (ETSS) Model Upgrade: Effective August 15, 2023
• Oct 2: SCN23-79 Updated: Upgrade of Aviation Weather Center Website on October 16, 2023
• Jun 29: SCN23-78: Changes to Public and Fire Weather Forecast Zones for WFO Fairbanks, AK: Effective September 19, 2023
• Jun 29: SCN23-77: Changes to Public Forecast Zones for WFO Anchorage, AK: Effective September 19, 2023
• Aug 18: SCN23-76 Updated: Upgrade of National Water Model on NCEP’s WCOSS System and its Post-processing Application on the Integrated Dissemination Platform (IDP): Effective September 20, 2023
• Jun 29: SCN23-75: Change to Fire Zone for WFO Pittsburgh, PA: Effective September 19, 2023
• Jun 29: SCN23-74: Changes to Public Forecast Zones for WFO Rapid City, SD: Effective September 19, 2023
• Nov 16: SCN23-73 Updated: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Sonoma County, California: Effective on or after September 19, 2023
• Jul 7: SCN23-72 Updated: Changes to Public Forecast Zones for WFO El Paso, TX: Effective September 19, 2023
• Jun 29: SCN23-71: Discontinuation of NWS Honolulu, HI’s Route Forecast (ROFOR): Effective July 31, 2023
• Jul 18: SCN23-70 Updated: The Climate Prediction Center (CPC) Operational Drought Outlooks (DOs) will Begin Including the U.S. Virgin Islands on or about August 17, 2023
• Jun 26: SCN23-69: Implementation of the Upgrade of the Whole Atmosphere Model-Ionosphere Plasmasphere Electrodynamics Model (WAM-IPE) Forecast System (WFS) to Version 1.2: Effective August 1, 2023
• Jun 21: SCN23-68: Operational Implementation of the US-Canada 1D Geoelectric Model on June 21, 2023
• Jun 21: SCN23-67: NWSChat 2.0 Application will Transition to Operations on or about August 1, 2023
• Aug 10: SCN23-61 Updated: Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images on or about August 22, 2023
• Jun 13: SCN23-66: The National Weather Service Began Operational Use of Iridium’s SafetyCast for Broadcasts of METAREA IV and XII High Seas Forecasts and Warnings on June 12, 2023
• Jun 9: SCN23-65: Update and Migration of National Weather Service Products and Services Catalog: Effective June 9, 2023
• Jun 9: SCN23-64: NOAA-21 VIIRS Imagery to be Added to the Satellite Broadcast Network on or after July 10, 2023
• Jun 7: SCN23-63: JetStream - the National Weather Service Online Weather School URL Change: Effective June 7, 2023
• Nov 28: SCN23-62 Updated: Temporary Removal of Canadian Radars from the Multi-Radar Multi-Sensor (MRMS) System: Effective June 5, 2023
• Aug 31: SCN23-61 Updated: Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images Implemented on August 24, 2023
• May 25: SCN23-60: Go-Live of New NCEP Hurricane Model, HAFS and Future Decommissioning of Legacy Hurricane Systems: Effective June 27, 2023
• May 18: SCN23-31 Updated: Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about May 31, 2023
• May 15: SCN23-59: Changes to ‘Alaska Weather’ Television Program and Soliciting Comments on Future Service Changes through July 30, 2023
• May 12: SCN23-58: Notification of Removal of AddThis from forecast.weather.gov and marine.weather.gov: Effective May 30, 2023
• May 10: SCN23-09 Updated: NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
• May 4: SCN23-57: Termination of Common Alerting Protocol Version 1.1 (CAP v1.1): Effective no sooner than January 8, 2024
• May 4: SCN23-50 Updated: Changes to LAMP Station-Based and Gridded Guidance: Effective June 6, 2023
• May 4: SCN23-49 Updated: Changes to the GFS-based Model Output Statistics (MOS) Guidance: Effective June 6, 2023
• May 2: SCN23-42 Updated: Activation of GOES-East/West Ice and Snow Products on the Satellite Broadcast Network (SBN) on or after June 5, 2023
• May 2: SCN23-56: Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to Version 4.0: Effective May 31, 2023
• May 1: SCN23-55: Operational Implementation of the Excessive Rainfall Outlook for Days 4-5 on or about June 1, 2023
• Apr 25: SCN23-54: Discontinuing Marine Service Chart MSC-15 for the Alaskan Waters: Effective April 26, 2023
• Apr 25: SCN23-53: Changes to the Weather Prediction Center Day 3-7 Hazards Outlook: Effective June 23, 2023
• Apr 24: SCN23-52: Correcting National Blend of Models (NBM) Low-Level Wind Shear (LLWS) Height Calculation, and Other Minor Fixes to NBM v4.1: Effective on or about April 25, 2023
• Apr 21: SCN23-46 Updated: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Upgrade: Effective May 2, 2023
• Apr 20: SCN23-08 Updated: Change to Significant Meteorological Information (SIGMET) Format at a Date to be Determined
• Apr 19: SCN23-51: Discontinuing the Forecasts of High Pressure Systems in the High Seas Text Forecasts Issued by WFO Honolulu, HI and the Ocean Prediction Center: Effective May 17, 2023
• May 18: SCN23-31 Updated: Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about May 31, 2023
• May 4: SCN23-50 Updated: Changes to LAMP Station-Based and Gridded Guidance: Effective June 6, 2023
• May 4: SCN23-49 Updated: Changes to the GFS-based Model Output Statistics (MOS) Guidance: Effective June 6, 2023
• Apr 10: SCN23-48: Termination of the Standard Data Format (SDF) and Sensor Observation Service (SOS) at NDBC: Effective June 24, 2023
• Apr 4: SCN23-35 Updated: Upgrade of the Great Lakes Waves-Unstructured Forecast System (GLWU) to Version 2.0.0: Effective May 9, 2023
• Apr 3: SCN23-47: Addition of Air Quality Alerts for the Metropolitan St. Louis, MO Area on or about May 3, 2023
• Apr 21: SCN23-46 Updated: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Upgrade: Effective May 2, 2023
• Mar 30: SCN23-45: Meteorological Assimilation Data Ingest System (MADIS) Version 4.0.8 Upgrade: Effective March 29, 2023
• Mar 26, 2024: SCN23-44 Updated: Implementation of Consolidated NWS Public Weather Program Products Related to Cold: Effective on or about October 1, 2024
• Mar 30: SCN23-33 Updated: Addition of Record Event Report for Hastings, NE on or about April 3, 2023
• Mar 28: SCN23-14 Updated: Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective March 28, 2023
• Mar 27: SCN23-12 Updated: New Cloud-Based NOAA’s nowCOAST Map Viewer and Map Services: Effective April 3, 2023
• Mar 24: SCN23-43: NWS API Version 1.11.1 Upgrade on or around March 22, 2023
• May 2: SCN23-42 Updated: Activation of GOES-East/West Ice and Snow Products on the Satellite Broadcast Network (SBN) on or after June 5, 2023
• Mar 21: SCN23-41: Termination of the River and Lake Forecast Product (RVD): Effective April 21, 2023
• Mar 17: SCN23-40: NWS Alaska Pacific River Forecast Center Discontinuing the Alaska Recreational River Forecast on April 17, 2023
• Mar 17: SCN23-39: NWS Alaska Pacific River Forecast Center Will Update Graphical Flood Products in Alaska on April 17, 2023
• Mar 17: SCN23-38: Updates to the Aeronautical Fixed Telecommunications Network (AFTN) on or around April 17, 2023
• Mar 17: SCN23-37: Implementation of Terminal Aerodrome Forecast (TAF) Service for Hardy-Anders Field/Natchez-Adams County Airport (KHEZ), Natchez, MS: Effective June 13, 2023
• Mar 15: SCN23-36: Eastern Pacific National Tropical Cyclone Watch/Warning (TCV) Product Issued by the National Hurricane Center to Include Both Inland and Coastal Tropical Cyclone Wind Watches and Warnings: Beginning on or around June 15, 2023
• Apr 4: SCN23-35 Updated: Upgrade of the Great Lakes Waves-Unstructured Forecast System (GLWU) to Version 2.0.0: Effective May 9, 2023
• Mar 10: SCN22-77 Updated: Change to NOAAPort / Satellite Broadcast Network (SBN): Effective Early 2023
• Mar 28: SCN23-14 Updated: Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective March 28, 2023
• May 18: SCN23-31 Updated: Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about May 31, 2023
• Mar 28: SCN23-14 Updated: Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective March 28, 2023
• Mar 1: SCN23-07 Updated: WSA-Enlil Heliospheric Model to Include Cessation of WSA Results Generated at 5Rs, Relocation of Time Series Acquisition Point from Earth to L1, and Improved WSA Results: Effective April 4, 2023
• Mar 1: SCN23-34: Change to the Transmission Deadline of the Weather Prediction Center QPF: Effective on March 1, 2023
• Mar 30: SCN23-33 Updated: Addition of Record Event Report for Hastings, NE on or about April 3, 2023
• Feb 28: SCN23-32: Removal of Watch Warning Advisory (WWA) Section at the Base of the NWS Weather Forecast Office (WFO) Anchorage, AK Area Forecast Discussion (AFD): Effective March 30, 2023
• Mar 27: SCN23-12 Updated: New Cloud-Based NOAA’s nowCOAST Map Viewer and Map Services: Effective April 3, 2023
• May 18: SCN23-31 Updated: Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about May 31, 2023
• Feb 23: SCN23-30: Operational Implementation of Arrival of Tropical Storm-Force Winds Graphics for the South Pacific and Western North Pacific Based on Forecasts from the Joint Typhoon Warning Center (JTWC) on or around May 15, 2023
• Feb 23: SCN23-29: Operational Implementation of Wind Speed Probability Graphics for Tropical Cyclones in the South Pacific and Western North Pacific Basins based on Joint Typhoon Warning Center Forecasts on or around May 15, 2023
• Feb 23: SCN23-28: Extension of the Tropical Weather Outlook and Graphical Tropical Weather Outlook Issued by the National Hurricane Center and the Central Pacific Hurricane Center Out to 7 Days on or around May 15, 2023
• Feb 23: SCN23-27: Changes in County Forecasts and Warnings on NOAA Weather Radio All Hazards (NWR) Transmitters for Select Counties in South Carolina and Georgia: Effective March 30, 2023
• Feb 23: SCN23-26: Operational Implementation of Track and Error Cone Graphics for Tropical Cyclones in the South Pacific and Western North Pacific Basins Based on Forecasts Issued by the Joint Typhoon Warning Center: Effective on or about May 15, 2023
• Feb 23: SCN23-25: Expansion of the Potential Storm Surge Flooding Map to Puerto Rico and the U.S. Virgin Islands on or around May 15, 2023
• Feb 23: SCN23-24: Addition of Invest Identification Numbers to the Geographic Headers within the Tropical Weather Outlook Issued by the National Hurricane Center and the Central Pacific Hurricane Center on or around May 15, 2023
• Feb 23: SCN23-23: Removal of Watch/Warning Information from the Tropical Cyclone Forecast/Advisory (TCM) Product Issued by the National Hurricane Center and the Central Pacific Hurricane Center on or around May 15, 2023
• Feb 23: SCN23-22: Weather Forecast Offices San Diego and Los Angeles/Oxnard, CA To Begin Issuing the Tropical Cyclone Local Watch/Warning Product and Update the Hurricane Local Statement Product on or around May 15, 2023
• Feb 23: SCN23-21: Addition of the Extreme Wind Warning to the Suite of Tropical Products Issued by WFO Guam: Effective on or around May 15, 2023
• Feb 22: SCN23-20: Discontinuation of the Max/Min Temperature and Precipitation Table Product for Louisiana: Effective Thursday, March 23, 2023
• Feb 22: SCN23-19: Activation of Metop-C ASCAT Winds on the Satellite Broadcast Network on or about March 24, 2023 
• Feb 22: SCN23-18: Operational Tropical Cyclone Discussion (TCD) and Tropical Cyclone Forecast/Advisory (TCM) Products for Tropical Cyclone Forecasts Originating from the Weather Prediction Center: Effective on or about May 15, 2023
• Feb 22: SCN23-17: Provision of Post-Tropical Cyclone Event Observational Data on Tropical Event Summary Webpages: Beginning on or about May 15, 2023
• Feb 22: SCN23-16: Operational Implementation of the Peak Storm Surge Forecast Graphic from the National Hurricane Center on or about May 15, 2023
• Feb 22: SCN23-15: Addition of Air Quality Alerts for the State of Nebraska: on or about April 3, 2023
• Mar 28: SCN23-14 Updated: Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective March 28, 2023
• Feb 21: SCN23-13: Notification of Removal of Logs from NWS’s TGFTP: Effective March 7, 2023
• Mar 27: SCN23-12 Updated: New Cloud-Based NOAA’s nowCOAST Map Viewer and Map Services: Effective April 3, 2023
• Feb 16: SCN23-11: A New Version of NWS National Map Viewer (“The Viewer”) will be Released on or about April 3, 2023
• Feb 15: SCN22-119 Updated: Changes to Public and Fire Weather Forecast Zones for WFO Los Angeles/Oxnard, CA: Effective March 8, 2023
• Feb 14: SCN23-10: Implementation of Terminal Aerodrome Forecast (TAF) Service for Upper Cumberland Regional Airport (KSRB), Sparta, TN: Effective May 2, 2023
• Oct 19: SCN23-09 Updated: NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
• Mar 10: SCN22-77 Updated: Change to NOAAPort/Satellite Broadcast Network (SBN): Effective in Early 2023
• Apr 20: SCN23-08 Updated: Change to Significant Meteorological Information (SIGMET) Format at a Date to be Determined
• Jan 30: SCN22-112 Updated: Activation of GOES-R Geostationary Lightning Mapper Gridded Data Products on the Satellite Broadcast Network on or after March 6, 2023
• Mar 1: SCN23-07 Updated: WSA-Enlil Heliospheric Model to Include Cessation of WSA Results Generated at 5Rs, Relocation of Time Series Acquisition Point from Earth to L1 and Improved WSA Results: Effective April 4, 2023
• Jan 27: SCN22-94 Updated: Changes to the Geographic and Spectral Coverage of GOES-East/West Imagery on the Satellite Broadcast Network: Effective December 1, 2022 (GOES-East) and January 4, 2023 (GOES-West)
• Mar 10: SCN22-77 Updated: Change to NOAAPort/Satellite Broadcast Network (SBN): Effective in Early 2023
• Jan 20: SCN23-06: Disestablishment of C-MAN Station PLSF1 - Pulaski Shoals Light, FL: Effective February 28, 2023
• Jan 20: SCN23-05: Disestablishment of C-MAN Station MLRF1 - Molasses Reef, FL: Effective February 28, 2023
• Jan 20: SCN23-04: Disestablishment of C-MAN Station DPIA1 - Dauphin Island, AL: Effective February 28, 2023
• Jan 10: SCN23-03: Adoption of New Upper Limit for Alert Duration of NOAA Weather Radio All Hazards Specific Area Message Encoding Alerts: Effective on or after February 16, 2023
• Jan 5: SCN23-02: Minor RTMA and URMA Upgrade to Flag Mesonet Winds and Wind Gust from the CWOP and AWS Providers, Fix a Reading Bug in the Observation Reject and Accept Lists, and Add Surface Pressure to the “RTMA Weather Status List” for the FAA: Effective on or about February 7, 2023
• Jan 5: SCN23-01: Shut Down Integrated Dissemination Program (IDP) GIS Web Services (IDP-GIS) Hosted and Running on IDP Infrastructure in College Park, MD and Boulder, CO: Effective June 29, 2023

   For older PNSs, SCNs and TINs, see our archive: https://www.weather.gov/notification/archive