True Airspeed Turbulence Wind Shear 
Air
MAY 21, 2025
Wind Shear: The Abrupt Shift Wind shear refers to any abrupt divergence in wind characteristics be it speed, direction, or both that unfolds over a minimal distance. It is a particularly insidious phenomenon that can be a prime cause of turbulence. DC = arctan(TAS/Vc) Where TAS is the True Airspeed.
Chess In the Air
JUNE 24, 2022
Moderate wind shear in some areas could make some thermals somewhat difficult to work but that, too, is typical. At the high density altitude at Rifle a ground speed of 92 kt would have been equivalent to an indicated airspeed of less than 80 kt. ” Unlike tornadoes and other twisters, microbursts are straight-line winds.
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