This cold blast could be relatively short-lived, with a return to more typical wintry temperatures by later in December.

A polar vortex is a large, low-pressure system of cold air that typically resides near the Earth’s poles, surrounded by ...

According to a forecast map shared by the agency, the states with the highest probability of seeing below average ...

More Arctic blasts could follow in the coming weeks before tapering off after the middle of the month. Those cold stretches ...

The Pacific Northwest is expected to see up to seven inches of rain this week, as the eastern United States braces for arctic ...

Another round of frigid weather is making its way to the Eastern United States and will affect most of Tennessee. If you ...

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

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 ...

Will the polar vortex change Alabama’s winter outlook and could it set the stage for a white Christmas? Here’s what we know ...

Polar vortex systems will bring dangerously cold weather to much of the U.S. this month. Learn how to stay safe, and which ...

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

Brace yourselves; winter is coming. "Polar vortex" may have been the weather catchphrase of last winter, but it's coming back and it's bringing snow and freezing temperatures along with it. While it ...