According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need ...
These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...
Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.
A potent shot of Arctic air starts settling in Monday as a massive dip in the jet stream pulls in frigid air across the ...