Wind and Rain in the Northeast; Atmospheric River to Impact the West

A cold front will cross the Great Lakes and Northeast U.S. through today with gusty winds and areas of rain showers. A strong atmospheric river is then expected to move into the Northwest by midweek bringing a threat for moderate to heavy rainfall and flooding, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Automatically generated image showing areas of convective available potential energy.


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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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Wind and Rain in the Northeast; Atmospheric River to Impact the West

Convective Parameters - Cape