What kind of conditions does a SIGMET report?

A SIGMET report provides information about non-convective hazards that can significantly impact the safety of all aircraft in flight. These hazards include severe turbulence, strong winds, icing, volcanic ash, and dust storms, among others. The purpose of a SIGMET is to alert pilots and air traffic control about potentially dangerous weather conditions that are not connected to thunderstorms, making it a vital tool for flight safety.

While severe thunderstorms are indeed serious hazards, they are reported by a different type of advisory known as a convective SIGMET. Regulatory changes and routine weather patterns are not what a SIGMET covers, as it focuses specifically on hazardous conditions that could affect the safety of flight operations. Thus, a SIGMET serves as an essential resource for pilots to make informed decisions during their flights, ensuring they are aware of any significant weather-related threats.