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, ...

Another arctic blast has sent temperatures plummeting across the United States, bringing “life-threatening” wind chills and ...

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 ...

Harsh weather moved west as a polar vortex was expected to grip the Rockies and the northern Plains after winter storms pummeled the eastern U.S. over the weekend, killing at least 10 people, ...

But at times some of the vortex can break off or move south, bringing unusually cold weather south and permitting warmer weather to creep up north.Related video above: Potentially record-setting ...

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 ...

But at times some of the vortex can break off or move south, bringing unusually cold weather south and permitting warmer weather to creep up north.This week, parts of the U.S. are experiencing the ...

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 ...