Public Information Statement
Issued by NWS National HQ
Issued by NWS National HQ
025 NOUS41 KWBC 281455 PNSWSH Service Change Notice 24-85 National Weather Service Headquarters Silver Spring MD 1055 AM EDT Wed Aug 28 2024 To: Subscribers: -NOAA Weather Wire Service -Emergency Managers Weather Information Network -NOAAPort Other NWS Partners, Users and Employees From: C. Bruce Entwistle, Chief Aviation and Space Weather Services Branch Subject: Updated PROB30 Usage in the Terminal Aerodrome Forecast (TAF): Effective on or about September 30, 2024 The NWS since 2002 has not allowed the term PROB30 in the first nine hours of the TAF.This restriction will end on or about September 30, 2024. This change aligns the U.S. TAF product with the International Civil Aviation Organization`s (ICAO`s) Annex 3, Meteorological Service for International Air Navigation, and improves consistency of the TAF with probability of precipitation forecasts in other NWS products. If you have comments or questions, please contact: Michael L. Graf Meteorologist/International Liaison NWS Headquarters Silver Spring, MD 301-427-9109 michael.graf@noaa.gov National Service Change Notices are online at: https://www.weather.gov/notification