The main effects of wind shear are: Turbulence. Violent air movement (up- or down-draughts or swirling or rotating air patterns) Sudden increase or reduction of airspeed.

How does wind shear effect aircraft?

Wind shear can be defined as a sudden change in wind velocity and/or direction over a short distance. ... The change in velocity or direction can drastically alter the aircraft lift, indicated airspeed, and thrust requirements when climbing or descending through the wind shear layers.

Why is wind shear dangerous for aircraft?

Wind shear and microbursts are among the most dangerous of all weather-related threats to flying. The unpredictable changes in wind speed and direction make it difficult to control the aircraft, with headwinds, tailwinds and up and down drafts all in quick succession.