Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States ...

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

Brutal midwinter cold is settling in across the eastern United States, and forecasters say it is not leaving quickly. A disrupted polar vortex is expected to keep Arctic air locked over the region ...

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

A crippling winter storm that could paralyze parts of the Southern and Central U.S. this weekend, and some of the effects ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

This winter, the Northern Hemisphere has been suffering from extreme cold. In South Korea, an unusually prolonged cold wave ...

It exists all the time, but it usually gets stronger in winter. When the jet stream (a river of wind) bends and dips south, ...

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and what might happen next.

A polar vortex is expected to bring two surges of extremely cold air to the U.S. in January. Here's what to know in Middle Tennessee.

With over 170 million Americans facing below-average temperatures, even colder air may be on the horizon thanks to the displacement of the polar vortex that will lock in the feel of winter and park ...