Severe Thunderstorms in the Central U.S.; Heavy Rain in the Southwest

Isolated strong to severe thunderstorms are possible in parts of the Midwest and the south-central Plains. Heavy rainfall pose a risk of flash flooding in the Desert Southwest and northeast New Mexico, especially in burn scars, and in the urban corridor of southeast Florida. Read More >

Automatically generated image showing areas of the significant tornado parameter.


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Significant Tornado (SigTor)

A composite index that includes 0-6 km bulk wind shear, 0-1 km storm-relative helicity, surface based CAPE, surface parcel CIN, and surface parcel LCL height. Values greater than 1 are indicative of increased potential of significant tornadoes.

The contours are the Lifted Condensation Level or LCL. A lower LCL typically increases tornadic risk because it is indicative of air parcel acceleration occurring closer to the surface.

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Severe Thunderstorms in the Central U.S.; Heavy Rain in the Southwest

Convective Parameters - SigTor