Convective SIGMET — “Significant Meteorological” advisory.
- Alerts for severe thunderstorms, lines of thunderstorms, embedded thunderstorms,
hail ≥ 3/4 inch, tornadoes.
- Issued by the Aviation Weather Center for the CONUS.
- Valid for 2 hours typically.
- If a convective SIGMET is active in your area, do not fly. Gust fronts, lightning,
and heavy rain will destroy a sUAS.