Fueled by a disturbed polar vortex, 18 states and D.C. have had more snow than average into December. In some areas, snowfall ...

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

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

Arctic wind patterns create a sort of wall around the pole that prevents frigid air from trickling southward. That wall that ...

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

Cold temperatures are set to continue into the weekend, but New England will feel another icy blast of Arctic air Sunday ...

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

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

The planet's most extreme cold air will be barreling into the central and eastern United States this coming weekend "like a ...

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 ...

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

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