National Weather Service United States Department of Commerce

Additional Heavy Rainfall for Florida; Severe Thunderstorms in the High Plains and the East on Friday

Continued heavy to excessive rainfall may bring considerable to locally catastrophic urban flooding through Friday across South Florida. Elsewhere across Florida, flash and urban flooding remains possible through Saturday. A slight risk of severe thunderstorms (Level 2 of 5) exists Friday in the central High Plains and from the Mid-Atlantic to southern New England. Read More >

Automatically generated image showing areas of convective available potential energy.

 

Thumbnail of an automatically generated image showing areas of convective available potential energy. Thumbnail of an automatically generated image showing areas of convective available potential energy. Thumbnail of an automatically generated image showing areas of convective available potential energy.
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4 Panel Display | Animated Loop

CAPE 

This is a surface based Convective Available Potential Energy (CAPE) measurement only.  In the cool season, elevated instability may be much higher than surface based cape.

On average, CAPE of 1000 J/Kg is usually sufficient for strong to severe storms. CAPE of 3,000 to 4,000 J/Kg or higher is usually a signal of a very volatile atmosphere that could produce severe storms if other environmental parameters are in place.

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