In general, wind shear refers to any change in wind speed or direction along a straight line. In the case of hurricanes, wind shear is important primarily in the vertical direction--from the ...

Tropical Cyclone Iris is being battered by wind ... so as it moves over cooler waters and into areas of stronger vertical wind shear. The storm is expected to dissipate in the next day or two.

Visible imagery from NASA's Terra satellite revealed that strong wind shear was adversely affecting Subtropical Cyclone Joaninha ... westerly to northwesterly vertical wind shear were tearing ...