Certified Flight Instructor (CFI) Practice Exam

A Convective SIGMET is issued under what conditions?

1. For foggy weather conditions

2. For thunderstorms affecting large areas or lasting over 30 minutes

3. For severe icing exceeding 3,000 square miles

4. For routine weather reports

The correct answer is: For thunderstorms affecting large areas or lasting over 30 minutes

A Convective SIGMET is specifically issued to alert pilots to hazardous weather conditions associated with convective activity, primarily thunderstorms. This type of SIGMET is generated under certain conditions that indicate a significant potential for severe weather hazards, including thunderstorms that affect large geographical areas or last for an extended period, typically more than 30 minutes. These warnings are crucial for flight safety as they inform pilots of possible turbulence, low visibility, and storm-related dangers that could impact flight operations. The focus on thunderstorms in the correct answer highlights the nature of Convective SIGMETs, which are primarily concerned with severe convective phenomena rather than general weather conditions. Additionally, a Convective SIGMET is not concerned with conditions like fog, which is categorized differently, nor does it address routine weather reporting or less severe weather phenomena like icing unless it is specifically linked to convective activity that meets the established criteria for severe weather.