When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation ...

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

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 ...

If you couldn’t get enough of the cold temperatures in early December, there’s more on the way for Tennessee this coming ...

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

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

The Polar vortex is causing temperatures to plummet dangerously across the Philadelphia region, and frostbite could become a ...

The coldest air of the early winter season is blasting the eastern U.S. on Monday, with single-digit temperatures with the wind chill.

CLEVELAND — The temperature outside was so cold that your fingers, toes, nose and cheeks felt like they were burning. A harsh Arctic cold wave brought record-breaking temperatures to the United States ...