Heavy Rainfall in the Southwest; Scattered Severe Thunderstorms in the Mid-Atlantic

Heavy rainfall and the potential for flooding will continue through this evening in the Southwest, with particular concern for flooding over recent burn scars and higher terrain. Scattered severe thunderstorms containing the potential for damaging wind gusts and excessive rainfall are possible from the Mid-Atlantic to southern New England through tonight. Read More >

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


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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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Heavy Rainfall in the Southwest; Scattered Severe Thunderstorms in the Mid-Atlantic

Convective Parameters Shear - 0-1km