(CNN) An intense and potentially historic fall snowstorm is expected to dump feet of snow starting Wednesday across portions of the north-central United States.

It begins on Wednesday night and Thursday, when extreme cold temperatures will sweep down from the north.

Then a low will exit the Rockies and track northeast across the Plains leaving a blanket of snow across the region.

Temperatures in Denver could plummet 50 degrees

A drastic temperature drop Wednesday will make it feel like Denver has gone from fall to winter in 24 hours.

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