weather theoryFAA-published sample question (ATM, Aug 2021)
A squall line is most likely to be encountered
A
on or ahead of a cold front in moist, unstable air.✓ Correct Answer
B
during the passage of a warm front.
C
in an area of rising barometric pressure.
Explanation
A squall line is a non-frontal band of thunderstorms that most often forms on or ahead of a cold front in moist, unstable air. It is not typical of warm-front passage, and rising pressure follows rather than accompanies it.
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