According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need ...

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this ...

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into ...

A polar vortex will plunge Colorado into bitter, sub-zero cold this weekend and could bring up to 10 inches of snow in some ...

A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.

The polar vortex is expected to reach the Utah-Idaho border sometime in the late afternoon and evening Friday as it continues ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

A look at some of today's top trending headlines including the latest updates on the Gaza ceasefire deal, polar vortex and ...

A brutal polar vortex is set to bury the Big Apple in snow Sunday and then deliver deadly single-digit temperatures that will ...

A major cold blast is in store for millions of Americans as a lobe of a polar vortex will bring brutally cold temperatures to ...

Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ...

Here is what is and isn't a polar vortex when Colorado receives cold like what is forecast for the holiday weekend.