[Ref AC 00-6B] Turbulence is irregular motion of an aircraft in flight, especially when characterized by rapid up-and-down motion caused by a rapid variation of atmospheric wind velocities. 3 major causes (types) of Turbulence convective currents : called convective turbulence obstructions in the wind flow : called mechanical turbulence (e.g Mountain Wave) wind shear   … Continue reading What’s Turbulence?