Polar vortex maps show where arctic blast is set to freeze the U.S. as far as the Deep South
A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.
Map Shows Coldest Places in US as Polar Vortex Descends
Much of the U.S. could see bitterly cold temperatures on Monday, after Arctic air was forecast by the National Weather Service (NWS) to spread south and east from the Rockies ... around zero degrees ...