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What Is A 'Heat Dome' And Why Is It Causing The Tri-State To Swelter?

by Justin Lewis, CBS2 Meteorologist

A heat dome is a considerably large geographic area under the influence of high pressure in which excessively hot and humid conditions persist.

A pattern sets up where hot air at the surface rises into the atmosphere, returns to the surface due to the high pressure - and the process repeats.

Since the hot air can't escape -- it's as if there's a lid in the atmosphere -- it is referred to as a heat dome.

LINK: Tips To Beat The Heat: Your Guide To Summer Safety

A simple pattern change usually breaks down a heat dome, such as the passage of a cold front, and, furthermore, replaces the hot air mass with a relatively cool one.

This is the scenario we're anticipating over the weekend into early next week where temperatures will return to near normal.

Click here to check the forecast.

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