National Weather Service United States Department of Commerce

Coastal Storm Impacting the Mid-Atlantic; Heavy to Excessive Rain in the Plains; Tropical Depression Seven in the Atlantic

A coastal storm continues to bring bands of heavy rain, gusty winds, minor coastal flooding, and rip currents over the Mid-Atlantic region today. Heavy rain showers and thunderstorms persist across the Plains today with possible excessive rainfall over western South Dakota. Tropical Depression Seven has formed in the central Atlantic and could become a tropical storm later today. 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.
Hour - 1 Hour - 2 Hour -3

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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