What type of weather event does a Convective SIGMET specifically address?

A Convective SIGMET specifically addresses severe thunderstorms, which are a significant weather event that poses hazards to aviation. These signals are issued when certain criteria are met, such as the presence of thunderstorms that produce hail of 1 inch or greater, surface winds of 50 knots or greater, or tornadoes. Convective SIGMETs are important as they alert pilots and air traffic controllers to potentially dangerous weather conditions within a specified region, ensuring safety during flight operations.

Fog, heavy rain, and snow showers, while they can also impact aviation, are not the focus of Convective SIGMETs. Instead, they are typically addressed through different advisories which are more applicable to those specific weather phenomena.