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

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

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

A long-awaited blast of cold air, courtesy of the polar vortex, will overtake much of the US, but the forecast says the low ...

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

This coming weekend, the central and eastern United States will receive a blast of Arctic air, which will also affect ...

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

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

A polar vortex is a large, low-pressure system of cold air that typically resides near the Earth’s poles, surrounded by ...

A polar vortex is a mass of cold air that normally stays contained over the Arctic. The cold blast is predicted to be ...

That’s what’s happening this weekend: a stretched polar vortex is helping send arctic air deeper into the United States, ...

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