WASHINGTON — We are in the middle of a blast of extreme cold weather in D.C. The polar vortex has shifted, spilling cold air ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

This blast of cold weather is due to activity of the polar vortex.

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

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

Americans have been warned to brace for more winter storms as Arctic winds are set to dump more ice and snow amid freezing ...

A group of Canada geese were gathered on the frozen water of the Ohio River near New Cumberland Thursday afternoon. According ...

Frigid temperatures engulfed the South on Monday ahead of a winter storm that’s expected to spread heavy snow and disruptive ...

VIRGINIA BEACH, Va. — Looking ahead to next week, a major arctic blast is expected to settle into Hampton Roads and ...

The Arctic air mass will be in Colorado Friday afternoon, but the effects of the polar vortex won't be fully felt until after the sun goes down. Snow will come into the state's high country in two ...

Satellites orbiting the Earth have captured the effects of a "polar vortex" on camera, as swathes of the U.S. are gripped by Arctic conditions. One image taken by the National Environmental ...