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 mass of cold air that normally stays contained over the Arctic. The cold blast is predicted to be ...

This coming weekend, the central and eastern United States will receive a blast of Arctic air, which will also affect ...

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

Another round of bone-chilling air from the Polar Vortex is expected to invade the central and northeastern U.S. this weekend ...

The northern U.S. is bracing for bone-chilling cold as a weakened polar vortex pushes Arctic air south. How cold will temps ...

The polar vortex can commonly be disrupted during the winter and is known to cause an Arctic outbreak in the United States.

A fresh shot of Arctic air could bring the coldest air of the season for many this week, according to AccuWeather ...

Are you over the cold yet? Astronomical winter is more than a week away, and the subfreezing temperatures on most days have ...

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

The northern U.S. is bracing for bone-chilling cold as a weakened polar vortex pushes Arctic air south. How cold will ...