A combination of weather conditions may make it colder than usual across parts of the Central and Northern U.S. next week.

A chilling forecast looms over the East Coast, with a polar vortex promising a hellish winter storm next week.

A rare weather phenomenon that hasn't occurred since 1968 is expected to plunge temperatures across parts of the United States.

A rare stratospheric event is forecast to unleash bone-chilling air from a weakening vortex across the US and New England, ...

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

A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across ...

In 2014, the term “polar vortex” burst on the scene across Canada and the U.S. as temperatures plunged. In some places, it ...

Over the next 10 days, scientists say, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December across parts of the Northern Hemisphere.

A polar vortex — a large area of low pressure — is heading south from the Arctic, bringing with it cold weather across many ...

An extreme warming event high in the atmosphere is threatening to disrupt the polar vortex. We break down what that could ...

For folks who long for cold, the weeks after Thanksgiving might just be a tease for some intense Arctic cold that could ...

By Thursday, Arctic air will funnel across the Great Lakes Basin, dropping temperatures and fueling strong winds.