Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.
A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...
The polar vortex is weakening, and pockets of cold air are expected to break off and travel south into the United States — with some Arctic air expected to encroach on New England after Thanksgiving, ...
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