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

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

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

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

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

Another round of bone-chilling air from the Polar Vortex is expected to invade the central and northeastern U.S. this weekend ...

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

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

Are you over the cold yet? Astronomical winter is more than a week away, and the subfreezing temperatures on most days have ...

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

Some sates saw subzero temps. Here's how cold it got in all states, and why it got so cold.