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

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 ...

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

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid weather.

Cross-polar flow is a phenomenon that describes the movement of air over the North Pole. For U.S. context, this generally ...

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

A polar vortex system is expected to bring two or more cold waves to Florida this week. Temperatures in North Florida could ...

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

A cold front from an expanding polar vortex brought chilly temperatures to North and Central Florida. Temperatures are ...

A polar vortex is bringing Arctic air into the United States, and during this time, the state can expect temperatures to drop ...