Severe Thunderstorms in the High Plains; Heavy Rainfall in the Mid-Atlantic

An Enhanced Risk (level 3 of 5) of severe thunderstorms is forecast across portions of the Central High Plains this afternoon. Severe wind gusts up to 70 mph and large hail will be possible. While PTC Eight has dissipated, additional heavy to excessive rainfall will be possible today across the Mid-Atlantic, especially in southeastern Virginia. Read More >

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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Severe Thunderstorms in the High Plains; Heavy Rainfall in the Mid-Atlantic

Convective Parameters Shear - 0-1km