The polar vortex is a large upper-level, low-pressure area or circulation that typically resides above the Arctic Circle.

A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is ...

Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

"With rounds of sub-zero temperatures expected in portions of the Plains and Midwest, widespread lows in the teens and 20s ...

Frigid Arctic air is pushing south into the United States, and fortunately, it doesn’t look like freezing temperatures will ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

Polar vortex will hit the U.S. with three waves of snow, extreme cold and storms. Will Mississippi weather feel the chill?

A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they ...

A “polar vortex” is one of those weather terms that gets thrown around during winter outbreaks, but Bishop said it’s ...

Most of Virginia is expected to receive 1-4 inches of snow on Monday, just three days after a similar snowfall covered all ...