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Polar vortex and arctic air

Updated: Tuesday, 22 Jan 2013, 6:10 PM CST
Published : Tuesday, 22 Jan 2013, 6:10 PM CST

ASHWAUBENON - This frigid blast of arctic air isn't something that's exclusive to Northeast Wisconsin. It's affecting a large portion of North America. So where does it come from? FOX 11 Meteorologist Phil DeCastro explains.

Click the play button to watch the video.

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