weather theoryFAA-published question bank (Private Pilot, 2008)
A pilot can expect a wind-shear zone in a temperature inversion whenever the windspeed at 2,000 to 4,000 feet above the surface is at least
A
10 knots.
B
15 knots.
C
25 knots.✓ Correct Answer
Explanation
The FAA's weather guidance states that a wind shear zone can be expected in a low-level temperature inversion when the wind 2,000 to 4,000 feet above the surface is 25 knots or more, because the calm air trapped below the inversion meets the strong wind above it. 10 and 15 knots are not the stated threshold.
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