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NWS Service Change Notices

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National Service Change Notices and Public Statements

Weather.gov > NWS Service Change Notices




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

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Service Change Notices(SCN, Current-2023)

Data Management Messages

Archive of PNS/SCN/TIN (1996-2022)

Public Information Statements 2026 

Jul 29: PNS26-56: Soliciting Comments through August 31, 2026 on  Discontinuing National Weather Service’s Regional Sea State  Analyses while Increasing Full Ocean Basin Sea State Analyses to Twice Daily

Jul 23: PNS26-55: Soliciting feedback through August 24, 2026 on the use of preliminary earthquake information from NWS Tsunami Warning Centers

Jul  08:PNS26-54: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on July 16, 2026

Jul  08: PNS26-53: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on July 14, 2026

Jul  01: PNS26-25 Updated: Soliciting comments for Experimental Ensemble QPF Tracking Tools through August 7, 2026

Jul  01: PNS26-52 Updated: Soliciting Comments on Proposed Changes to the Weather Prediction Center (WPC) National Forecast Chart through July 31, 2026

Jun 25: PNS26-52 Updated: Soliciting Comments on Proposed Changes to the Weather Prediction Center (WPC) National Forecast Chart through July 31, 2026

Jun 17: PNS26-51:  National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on June 25, 2026

Jun 17: PNS26-50: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on June 24, 2026

Jun 10: PNS26-40 Updated: Soliciting Comments on experimental updates and modifications to the Monthly and Seasonal U.S. Drought Outlooks from the Climate Prediction Center through August 3, 2026

Jun 10: PNS26-49: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Testing June 11 and 12, 2026

Jun  9:  PNS26-48: Soliciting Comments through July 13, 2026 on the proposed discontinuation of the High Frequency (HF) Radiofax Broadcasts from Hawaii, Alaska, Massachusetts, California, and Louisiana

Jun  8:  PNS26-47: NWS soliciting comments on the Proposal to Standardize Radial Ice Measurements through July 9, 2026

May 29: PNS26-46: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Testing June 1, 2026

May 28: PNS26-45: Soliciting Comments on the Experimental Solar Wind Display Product for In-Situ Instruments through June 28, 2026

May 28:PNS26-44: Soliciting Comments on the Experimental Alaska HeatRisk Product through September 30, 2026

May 22: PNS26-43: Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Testing May 26, 2026

May 15: PNS26-42: Tropical Collaboration Testing May 18, 2026

May 13: PNS26-41: Temporary Suspension of Ocean Prediction Center’s 72- and 96-hour surface graphical products effective June 1, 2026

May 11: PNS26-40 Updated: Soliciting Comments on experimental updates and modifications to the Monthly and Seasonal U.S. Drought Outlooks from the Climate Prediction Center through August 3, 2026

May 01: PNS26-39: Notice of Coordinated Annual Tsunami Exercise for the Pacific 2026 (PACIFEX26) May 5, 2026

Apr 30:  PNS26-38: Soliciting Comments through October 27, 2026 on the Experimental Use of Commercial Data in the Global Total Electron Content (GloTEC) Ionosphere Model

Apr 27: PNS26-37: Tropical Collaboration Testing April 28 and 29 (Backup Date April 30 and May 19-21)

Apr 21: PNS26-36: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on April 30, 2026

Apr 21: PNS26-35: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on April 28, 2026

Apr 21: PNS26-34: Soliciting comments on the Probabilistic HeatRisk Prototype through September 30, 2026

Apr 20: PNS26-33: Hurricane Threats and Impacts (HTI) Mosaic Testing on April 21, 2026 (backup date: April 23, 2026)

Apr 17: PNS26-32: Soliciting Comments on Proposed Changes to the Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model through May 17, 2026

Apr 16: PNS26-31: Spring 2026 Forecast Zones Implementation will occur today, April 16, 2026

Apr 16: PNS26-30: Soliciting Public Comments through May 16, 2026, on the Termination of Various Products from the Global Forecast System

Apr 15: PNS26-16: Updated: Soliciting Comments on Transition of Reference Points in Aviation Weather Products through May 15, 2026

Apr 15: PNS26-29: Soliciting Public Comments through May 15, 2026 on the Proposed Upgrade to the Global Forecast System

Apr 14: PNS26-28: Soliciting Comments until May 15, 2026, on Ending Dissemination of Climate Prediction Center Legacy Redbook Graphic Images

Apr 14: PNS26-27: Soliciting Public Comments through May 14th, 2026, on the Proposed Removal of All Products from Smartinit

Apr 14: PNS26-26: Soliciting Public Comments through May 14th, 2026, on the Proposed Removal of All Products from the Combined NCEP/FNMOC Wave Ensembles (NFCENS) system

Apr 08: PNS24-31 Updated: Soliciting Comments on Experimental HeatRisk Grids in the National Digital Forecast Database (NDFD) and WPC HeatRisk CONUS Viewer through September 30, 2026

Apr 06: PNS26-25: Soliciting comments for Experimental Ensemble QPF Tracking Tools through June 30, 2026

Apr 03:PNS26-24: Soliciting Comments on Proposed Retirement of Graphical AIRMET BUFR Format through May 4, 2026

Mar 26: PNS26-23: Soliciting Comments on Experimental Ceiling and Visibility Dashboard product through April 30, 2026

Mar 24: PNS26-22: Soliciting Comments on the Experimental Tropical Cyclone Track and Error Cone Graphics from the National Hurricane Center Through November 30, 2026

Mar 19: PNS26-21: Experimental implementation of the Evaporative Demand Drought Index (EDDI) monitoring product for the Contiguous U.S. on or about March 24, 2026

Mar 18: PNS26-20: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on March 26, 2026

Mar 18: PNS26-19: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on March 24, 2026

Mar 13: PNS26-18: Soliciting Comments through April 20, 2026 on the Upcoming Change in the Delivery Time of the Ultraviolet Index (UVI) Forecast

Mar 12: PNS26-17: Soliciting Comments through April 15, 2026 on Upgrading Real-Time Ocean Forecast System (RTOFS) to version 3.0.

Mar 05: PNS25-34Updated: Soliciting comments on expansion of experimental Spanish-Translated Tropical Cyclone Products to the Central Pacific and those issued by the Weather Prediction Center through November 30, 2027

Mar 05: PNS26-16: Updated: Soliciting Comments on Transition of Reference Points in Aviation Weather Products through May 15, 2026

Mar 05: PNS24-13Updated: Soliciting Comments on Experimental Spanish- Translated Tropical Cyclone Products from the National Hurricane Center (NHC) through November 30, 2027

Mar 03: PNS26-15: Soliciting Comments through April 05, 2026 on the Proposed Upgrade of the Hurricane Analysis and Forecast System (HAFS) to version 2.2

Feb 23: PNS26-14: Soliciting Comments on the Termination of the Space Weather Prediction Center (SWPC) CTIPe Total Electron Content Model until March 25, 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 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

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: PNS24-72Updated: 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: PNS25-58Updated: 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: PNS25-58Updated: 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
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