weather servicesFAA-published sample question (FIA, Aug 2021)
Convective SIGMETs are issued for which weather conditions?
A
Any thunderstorm with a severity level of VIP 2 or more.
B
Cumulonimbus clouds with tops above the tropopause and thunderstorms with 1/2-inch hail or funnel clouds.
C
Embedded thunderstorms, lines of thunderstorms, and thunderstorms with 3/4 inch hail or tornadoes.✓ Correct Answer
Explanation
AIM 7-1-6 says Convective SIGMETs are issued for severe thunderstorms (surface winds of 50 knots or more, hail 3/4 inch or larger, or tornadoes), embedded thunderstorms, lines of thunderstorms, and large areas of strong thunderstorms. VIP 2 is too low a threshold and 1/2-inch hail is below the criterion.
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