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

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

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

As we head into the polar vortex, meteorologists are calling for up to a foot of snow in some parts of the U.S.

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

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 ...

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 ...

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid weather.

Arctic wind patterns create a sort of wall around the pole that prevents frigid air from trickling southward. That wall that ...

The Arctic polar vortex is expected to move south, which some say will lead to the coldest, harshest winter in years. Wyoming ...

Some light snow is possible across much of New Jersey on Friday night after an Arctic blast of much frigid air could ...