Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ...
These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...
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 polar vortex is slated to sweep most of the continental United States bringing a hazardous freeze to millions of Americans ...