SEVERE WEATHER FORECAST ALERTS
Pilot/Controller Glossary with JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov
Preliminary messages issued in order to alert users that a Severe Weather Watch Bulletin (WW) is being issued. These messages define areas of possible severe thunderstorms or tornado activity. The messages are unscheduled and issued as required by the Storm Prediction Center (SPC) at Norman, Oklahoma.
See AIRMEN'S METEOROLOGICAL INFORMATION (AIRMET); CONVECTIVE SIGMET; CWA; GRAPHICAL AIRMEN'S METEOROLOGICAL INFORMATION; SIGMET.