CONVECTIVE SIGMET
Pilot/Controller Glossary with JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov
A weather advisory concerning convective weather significant to the safety of all aircraft. Convective SIGMETs are issued for tornadoes, lines of thunderstorms, embedded thunderstorms of any intensity level, areas of thunderstorms greater than or equal to VIP level 4 with an area coverage of 4/10 (40%) or more, and hail 3/4 inch or greater.
See AIRMEN'S METEOROLOGICAL INFORMATION (AIRMET); CWA; GRAPHICAL AIRMEN'S METEOROLOGICAL INFORMATION; SAW; SIGMET.
Refer to AIM.