What is the purpose of convective SIGMETs (WST)?

Convective SIGMETs (Significant Meteorological Information) serve a crucial role in aviation safety by providing timely alerts about significant weather phenomena that can affect flight safety. These advisories specifically indicate the presence of severe thunderstorms, which can include hazardous conditions such as tornadoes, significant turbulence, and the potential for hail of 3/4 inch or greater in diameter. The timely dissemination of such information allows pilots and flight planners to make informed decisions, adjusting flight routes to avoid hazardous conditions.

This focus on severe weather is central to the function of Convective SIGMETs, as they are designed to highlight conditions that could lead to dangerous flying situations. Understanding these weather phenomena is essential for maintaining safety in aviation operations, making this choice the correct answer to the question concerning the purpose of convective SIGMETs.