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 ...

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

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

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

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

High above the North Pole, about 10 to 30 miles above Earth’s surface, sits a massive whirlpool of icy air known as the polar ...

According to Cincinnati.com, the polar vortex broke, which, again, is a common phenomenon. "The North Pole is covered by the polar vortex, a massive circular upper-air weather system in the Arctic," ...

More Arctic air is building over northern Canada and will be directed into the United States, courtesy of the polar vortex. How long will the cold waves last? Will it stay cold through Christmas?

Temperatures will then start to fluctuate as the cold front moves in Monday. The average high for this time of year in South ...