What is the purpose of a SIGMET?

• A. To provide general weather information
• B. To alert pilots to hazardous weather
• C. To report runway conditions
• D. To summarize air traffic movements

Answer: (B)

A SIGMET, or Significant Meteorological Information, serves the crucial purpose of alerting pilots to hazardous weather conditions that may affect the safety of flight. This could include weather phenomena such as severe turbulence, icing, extensive thunderstorms, volcanic ash, or tropical cyclones. These alerts are essential as they provide timely information that helps pilots make informed decisions regarding their flight routes and safety measures.

The other options do not encompass the specific focus of a SIGMET. General weather information is provided by different types of reports, such as METARs and TAFs, which do not necessarily highlight hazardous conditions. Runway conditions are addressed through NOTAMs (Notices to Airmen) or other reports that focus on specific airport operations, rather than broader weather phenomena. Air traffic movements are monitored and reported by air traffic control and are not related to weather alerts, which are the primary concern of SIGMETs.