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⚖ Weather · PHAK Chapter 12, Weather; 14 CFR § 107.49Q-125 · 125 of 251

A remote pilot is set up for a commercial survey 18 miles from a visible line of cumulonimbus clouds. The briefing forecasts storm movement away from the survey area over 2 hours. The client has a hard deadline. What is the correct decision?

Why →
Cumulonimbus clouds produce rapidly changing and highly dangerous conditions including severe turbulence, lightning, hail, wind shear, and microbursts that can extend well beyond the visible storm. A forecast of storm movement is probabilistic, not a guarantee. Client deadlines are not a valid reason to accept hazardous weather conditions.
The trap →
METAR visibility at the nearest airport may meet minimums while conditions 18 miles away near a thunderstorm are dramatically different. Wind shear and gusts can extend 20+ miles from the visible storm. METAR-based go/no-go is insufficient when a large convective system is visible.
SOURCE → PHAK Chapter 12, Weather; 14 CFR § 107.49CHECKED APR 21ACS III.A.K1MED
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