When the polar vortex stretches, North America feels the chill. New research reveals some of the stratospheric patterns ...

A new study links cold snaps in North America to changes in the polar vortex. The vortex, a low-pressure zone over the Arctic ...

One new study identifies a 17% increase in the destructive potential of the strongest nor’easters, while another bolsters ...

If you live in the northern United States or Canada, you’ve probably come to dread the phrase “polar vortex” when it’s uttered by a meteorologist during the winter months. Think brutally cold air, ...

Strange things are happening in the sky above the Arctic — and they’re freezing the U.S. in unexpected ways. A new study ...

Less Arctic sea ice during the winter months also means higher temperatures in the atmosphere, which can weaken or even ...

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

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, ...

Even in a warming climate, brutal cold snaps still hammer parts of the U.S., and a new study uncovers why. High above the ...

Stratospheric polar vortex changes still trigger brutal U.S. winter cold snaps and extreme weather despite a warming climate.

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S.—and this study explains why. Researchers found that two specific patterns in the polar vortex, a swirling mass of cold ...