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Vertical windshear is…

  • A
    a change of horizontal wind direction and / or speed with horizontal distance.
  • B
    a change of vertical wind speed with horizontal distance.
  • C
    a horizontal shear of vertical wind.
  • D
    a change of horizontal wind direction and / or speed with height.

WIND SHEAR is a sudden change in wind direction and/or speed over a very short distance. We can think of wind shear as a gradient in wind velocity that can be interpreted in the same way as a pressure or temperature gradient. Wind shear can be broken up into two parts:

  • Horizontal wind shear - A change in the wind over a horizontal distance
  • Vertical wind shear - A change in speed and/or direction with change of height
Wind shear may be associated with a thunderstorm, a low-level temperature inversion, a jet stream or a frontal zone. 

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