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

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 ...

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

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

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

There are two of these polar vortexes -- one in the troposphere that affects weather every winter, and one in the stratosphere that contains much colder air but only affects the s ...

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

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

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

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 ...