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.