Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

Three rounds of cold Arctic air from a shifting polar vortex are expected to plunge much of the central and eastern U.S. into ...

Winter isn't just knocking anymore. It's kicked the door wide open and brought the polar vortex along for the ride. If you've ...

A shifting polar vortex will send multiple rounds of Arctic air into the central and eastern United States through the first ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

The first of three expected polar vortex systems is predicted to bring frigid temperatures. Here's what is expected in South ...

A growing body of research indicates that polar vortexes are likely becoming more frequent due to the climate crisis.

This arctic outbreak, fueled by a disrupted polar vortex atop La Niña patterns, will deliver subzero mornings Thursday across ...

The central to eastern US is set to be blasted with some of the most extreme cold anywhere on Earth just before Christmas, ...

This historic cold wave is expected to sweep across the northern and eastern parts of the country, causing widespread ...

Some forecasters say a complex dance involving the polar vortex could send some of Earth's most extreme cold toward the ...

Scientists are still trying to understand the atmospheric disturbances.