A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.
Millions of people across the U.S. will experience subzero or below-average temperatures in the coming days as a polar vortex coming from Siberia will usher in a new cold front. The Rockies ... the ...
A forecast map released on January 13 for the period of January 19 to January 23 indicates that much of the Lower 48 states will likely experience below-average temperatures, as a powerful cold front ...