Which information is contained in a CONVECTIVE SIGMET?

A CONVECTIVE SIGMET is a significant weather advisory specifically aimed at alerting pilots to hazardous weather conditions that may impact flight safety associated with convective activity. The information provided within a CONVECTIVE SIGMET focuses on severe weather phenomena that are typically associated with thunderstorms and other convective systems.

The inclusion of details about tornadoes, embedded thunderstorms, and hail measuring 3/4 inch or greater is crucial because these conditions can significantly impact aviation safety. Tornadoes pose extreme wind hazards, embedded thunderstorms can lead to unexpected turbulence and severe weather encounters, and large hail can damage aircraft structures and cause injury to occupants.

In contrast, other options list either benign weather conditions (like clear skies and light winds) or less relevant weather phenomena (like fog conditions and aerodynamic performance factors), which do not fall within the purview of a CONVECTIVE SIGMET's intent to warn pilots of critically dangerous weather linked to convection.