Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, researchers found that two specific patterns in the polar vortex, a ...

Three factors are combining to increase the likelihood of a weaker polar vortex this winter.

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The polar vortex is a massive, swirling band of cold air that normally traps frigid temperatures around the Arctic. However, recent scientific studies show this vortex is weakening, which could ...

More: Powerful polar vortex in the stratosphere brings frigid temperatures to US Polar vortex to blame? Experts say the polar vortex will play a role in next week's cold snap.

Polar vortex could prime atmosphere for spring snowstorms With plenty of cold air in place, the colder pattern during the second half of March could set the stage for springtime snowstorms.

What is a polar vortex collapse and why does it affect weather so dramatically?

Winter, which is warming faster than any other season for much of the US, seems to be making a comeback for the first time in years; this January was the coldest in the Lower 48 since 1988.

WASHINGTON (AP) — 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 ...