Convective SIGMET

A high-priority weather advisory issued for severe convective activity, including tornadoes, lines of thunderstorms, embedded thunderstorms, hail at the surface of 3/4 inch or greater, or any thunderstorm with an intensity level of VIP 4 or higher on radar. Convective SIGMETs are issued for the contiguous United States and imply severe or greater turbulence, severe icing, and low-level wind shear. All pilots should avoid areas covered by a Convective SIGMET.