What type of weather event does a SIGMET provide information about?

A SIGMET, or Significant Meteorological Information, is specifically designed to provide information about severe weather conditions that could impact aircraft operations. This includes severe turbulence, thunderstorms, and other hazardous phenomena.

When the weather conditions are deemed to be significant enough to require alerting pilots and air traffic personnel, SIGMETs are issued. They focus on conditions that can affect the safety of flight, such as strong thunderstorms that produce severe thunderstorms, tornadoes, or hail, as well as severe turbulence that might not be indicated by routine reporting.

The emphasis on severe conditions is crucial because pilots need timely and detailed information regarding significant weather to ensure safe navigation and operation of their aircraft. Other choices, while related to weather, either describe less critical conditions or do not provide the comprehensive focus on severe weather events that a SIGMET does. Thus, the correct answer effectively captures the primary purpose and focus of a SIGMET.