Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.
Morning Overview on MSN
Polar vortex map reveals which states are about to freeze in Arctic air
A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map ...
A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...
Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S.
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