January 7, 2014

What in the World Is a 'Polar Vortex'?

Alan Duke, CNN

The Associated Press

Americans in two dozen states from the Midwest to the Southeast and Northeast are shivering this week courtesy of a distorted polar vortex. The rush of cold air it's sending southward is the biggest visitor from the North Pole since Santa Claus. The gifts it brings, however, are chilling and generally unwelcome. Much of the United States has plunged into a deep freeze from record low temperatures.

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TAGGED: Polar Vortex, Jet Stream, Arctic