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

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

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 ...

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

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

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

Winter hasn't even officially started, but parts of the country are already bracing for what could feel like the deep freeze ...

A polar vortex will bring arctic air and subzero temperatures to parts of the U.S. through the middle of the month, according ...

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 ...

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

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

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