Evolution of a Superstorm — Culprit in Polar Vortex Redux

The polar vortex has arrived with a vengeance in parts of the United States — including where I live in Colorado. If you want to see photos of its dramatic arrival here — heralded by plunging temperatures, gusty winds, and snow — along with a detailed explanation for why it has returned, see my earlier post here.

But the long and short of it can be visualized in the beautiful animation above. Click the image to see it. Beware: It’s a really big file, so it could take longer than usual to

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