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

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

How Alaska’s cold keeps ending up in the Lower 48 A few atmospheric factors — including the polar vortex — have come together to make the US the epicenter of cold this winter. One is a ...

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 ...

WASHINGTON — The polar vortex hit its peak across much of America on Wednesday, with an icy grip that made Arctic Greenland seem like a toasty vacation spot in comparison. Even Mars has been ...

BISMARCK, N.D. — Harsh cold descend 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 ...