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The polar vortex has broken into ‘two swirling blobs of cold air’, bringing the most frigid conditions in decades to the midwest

As its name suggests, the polar vortex is found around the north pole. It’s a band of strong winds, high up in the atmosphere that keeps bitterly cold air locked around the Arctic region. This circulation isn’t considered a single storm, or even a weather pattern as such.

Related: Deep freeze: record-breaking cold as polar vortex grips America – in pictures

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from Top stories | The Guardian http://bit.ly/2Rr5nXN
31 Jan 2019
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at January 31, 2019

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