Name: So what is the polar vortex? US big chill explained
Uploaded: 2014-01-06T00:00:00+00:00
Description: The polar vortex is causing hazardous weather conditions across the north eastern United States. But what is the polar vortex? Our Weather Presenter Liam Dutton explains.

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The polar vortex is causing hazardous weather conditions across the north eastern United States. But what is the polar vortex? Our Weather Presenter Liam Dutton explains.

So what is the polar vortex? US big chill explained

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