What is the typical wind shear rate associated with a microburst?

• A. 1000 fpm
• B. 6000 fpm
• C. 300 fpm
• D. 1500 fpm

Answer: (B)

Microbursts create a very strong, short-lived downdraft that hits the ground and spreads outward, producing an extremely abrupt change in wind speed with height near the surface. This rapid vertical wind shear is what makes microbursts so dangerous to aircraft during takeoff and landing because a pilot can encounter sudden, powerful gusts or shifts in air movement over a short distance. The typical wind shear rate associated with a microburst is about 6000 feet per minute, reflecting how quickly wind speed can change with height in these events. Rates like 1000, 1500, or 300 fpm are far too small to capture the intense, rapid changes seen in microbursts, which is why 6000 fpm is the best match.