National Weather Service United States Department of Commerce

Overall A Tranquil Few Days For The Lower 48

The next few days will overall be tranquil across the Lower 48 with no major storm systems. Temperatures will mainly be below normal in the Eastern two-thirds of the U.S., locally heavy snow is expected in the central and southern Rockies and High Plains, showers and thunderstorms are possible along the Gulf Coast into Florida and air stagnation issues are likely to persist in the Northwest. 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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