Plain English Meaning
A quick shift in wind close to the ground that can throw an aircraft off its expected flight path during the most critical phases of flight.
Full Definition
A sudden change in wind speed or direction occurring within 2,000 feet of the ground, capable of producing rapid changes in airspeed, lift, and aircraft attitude during takeoff, approach, or landing.
Context Anchor
Seen in aviation weather forecasts, pilot reports, and airport weather information when near the ground is expected or reported.