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Automatically generated image showing areas of surface-1km vertical shear.


Hour - 1	Hour - 2	Hour -3

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Shear (0-1km)

Surface-1-km Vertical Shear is the difference between the surface wind and the wind at 1-km above ground level. These data are plotted as vectors with shear magnitudes contoured. 0-1-km shear magnitudes greater than 15-20 knots tend to favor supercell tornadoes.

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September is National Preparedness Month. Join us each week as we share important safety and preparedness information through our social media accounts. Check out our latest weather safety graphics here!

Convective Parameters Shear - 0-1km