The polar vortex's icy grip on much of America has Arctic Greenland seeming like a toasty vacation spot by comparison.

"An Arctic air mass is expected to plunge into the Central U.S. this week, with high confidence for widespread, ...

The polar vortex is not synonymous with cold snaps, but when it slides toward the United States, the polar jet stream can ...

The polar vortex has returned to the U.S., and frostbite-inducing temperatures are blasting millions of Americans.

The polar vortex, as explained by the National Weather Service, is a large area of low pressure and cold air that encircles ...

But what exactly is the polar vortex? The polar vortex is a large area of cold air and low pressure that typically remains around the North and South Poles. Imagine it as a giant whirlpool of cold ...

BISMARCK, N.D. — Harsh cold descended on the nation’s midsection Monday as a polar vortex gripped the Rockies and Northern Plains on the heels of weekend storms that pummeled the Eastern U.S ...

The polar vortex, as explained by the National Weather Service, is a large area of low pressure and cold air that encircles the Earth’s poles. Even though it’s often framed in the media as a ...

“It’s the depths of winter. Everything signals extreme biting, winter cold. Obviously this isn’t the first polar vortex episode of the winter, but it looks to be the most severe.” A ...