CHAPTER 01

AVIATION WEATHER

Windshear Weather

AVIATION WEATHER

Windshear Threat

What is Wind Shear. . . ?

Windshear is a weather phenomenon where a sudden and large increase in an airplane's headwind is quickly followed by a sudden and large increase in the aircraft's tailwind.

What is Wind Shear. . . ?

Windshear is a sustained change (i.e. lasting more than a few seconds) in headwind or tailwind resulting in changes in the lift to the aircraft. A decreased lift will cause the aircraft to go below the intended flight path. A change of 15 knots or more in headwind or tailwind is considered significant windshear which may require timely and appropriate corrective action by the pilot.  Any rapid change in wind direction or velocity

End Of Chapter 01