Polar vortex crosses Canadian border, will send U.S. temperatures into a nosedive

Image: Markell DeLoatch/ Public Opinion via AP A pinwheeling area of the polar vortex is clearing custom-mades at the Canadian border, heading for the north Plains, Midwest, Mid-Atlantic and Northeast U.S. For millions, this may be the coldest December weather in at the least a decade. On Thursday, temperatures may not rise above the low-pitched single toes Fahrenheit in Chicago, with any breezes making for dangerous wind chill temperatures. SEE ALSO: Polar vortex about to blast U.S. with coldest breath of the season By Thursday and Friday, the ultra-cold breath…

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