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

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

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

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

A polar vortex is a large, low-pressure system of cold air that typically resides near the Earth’s poles, surrounded by strong westerly winds in the upper atmosphere. "In the northern hemisphere ...

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

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

A fresh surge of Arctic air from the Polar Vortex is poised to plunge into the central and northeastern United States this ...

"Arctic air will bring near record cold temperatures and dangerous wind chills," the National Weather Service said.

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

A polar vcortex and an arctic blast can each bring frigid air to the greater Philadelphia region, but there are differences between the two to know.

Meteorologist Tyler Hamilton tracks the movement of a polar vortex, detailing a significant drop in temperatures across Canada. The forecast highlights extreme 24-hour temperature changes and explains ...