Flying Ace Exams
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A Convective SIGMET (WST) is issued automatically for:
A.
Any thunderstorm activity above the freezing level
B.
Severe or embedded thunderstorms, lines of thunderstorms, areas of thunderstorms covering 40%+ of an area of 3,000 sq mi or more, and tornadoes
C.
Thunderstorms only above 18,000 feet MSL — Class A airspace
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