weather theoryFAA-published sample question (FIA, Aug 2021)
A surface inversion can
A
indicate the chance of gusty winds.
B
produce poor visibility.✓ Correct Answer
C
mean an unstable air mass.
Explanation
A surface inversion is a very stable layer that traps haze, smoke and moisture near the ground, so PHAK notes it often produces poor visibility (and fog or low clouds with high humidity). It indicates stable, not unstable, air, and it suppresses rather than produces gusty surface winds.
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