Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ...
A potent surge of Arctic air starts settling in Monday evening as a massive dip in the jet stream pulls in frigid air across ...
A series of disturbances in the atmosphere is sending the polar vortex south (again) next week with a burst of even colder ...
A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...