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What is the polar vortex? In-depth look at how it can affect winter weather in the US.

Doyle Rice, USA TODAY Comments Off on What is the polar vortex? In-depth look at how it can affect winter weather in the US.

The polar vortex is a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole (as its name suggests).

      
Doyle Rice, USA TODAY
http://api-internal.usatoday.com.akadns.net

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