Snow season has gotten off to a fast start across swaths of the northern United States this year. Fueled in part by an ...

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 ...

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

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

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

Another brutally cold weekend is on the way as a piece of the Polar vortex dips out of the Arctic Circle, sending frigid air ...

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

Cold temperatures are set to continue on Monday, but New England will feel another icy blast of Arctic air linked once again ...

The United States is expecting another hit by the polar vortex starting this weekend. Here's what's expected in South ...

A polar vortex is a swirling mass of frigid air high in the atmosphere that normally circles the Arctic, according to the National Weather Service. Sitting in the stratosphere, it usually keeps the ...