Instrument Rating Checkride Practice Test

What is one condition that would prompt the issuance of a CONVECTIVE SIGMET?

1. Widespread IFR conditions

2. Thunderstorm activity with surface winds greater than 50 knots

3. Moderate turbulence

4. Light rain showers

The correct answer is: Thunderstorm activity with surface winds greater than 50 knots

The issuance of a CONVECTIVE SIGMET is specifically tied to significant convective weather phenomena, particularly those related to thunderstorms. One of the primary criteria for a CONVECTIVE SIGMET is when there is notable thunderstorm activity producing surface winds that exceed 50 knots. This level of wind is indicative of severe thunderstorms that can pose a substantial risk to aircraft, making it crucial for pilots to have this information for safety and operational planning. Widespread IFR conditions, moderate turbulence, or light rain showers, while important weather elements, do not meet the specific criteria for a CONVECTIVE SIGMET, as they do not indicate the same level of turbulence or threat associated with severe thunderstorms. Thus, the correct identification of conditions warranting a CONVECTIVE SIGMET emphasizes the focus on extreme weather typically linked to thunderstorms, which includes strong winds and other severe indicators such as hail or tornado activity.