What type of weather information does a SIGMET provide?

A SIGMET, or Significant Meteorological Information, provides in-flight weather warnings specifically for severe weather conditions that could impact aviation safety. This type of information includes hazardous weather phenomena such as severe turbulence, thunderstorms, icing, and volcanic ash that are significant enough to warrant warnings to pilots.

SIGMETs are crucial for pilots and air traffic controllers as they provide real-time updates on conditions that may not be apparent from regular weather observations or forecasts. Unlike routine weather updates, which may inform pilots of general aviation weather conditions, SIGMETs focus on immediate threats that could disrupt flight operations.

The other options relate to types of weather information that do not align with the purpose or content of a SIGMET, highlighting its unique role in aviation safety communication.