Three factors are combining to increase the likelihood of a weaker polar vortex this winter, the website reports. And a weaker polar vortex can lead to more dynamic winter weather patterns for the U.S ...

If you live in the northern United States or Canada, you’ve probably come to dread the phrase “polar vortex” when it’s ...

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

The polar vortex has taken on an unexpected pattern this winter — one that’s made part of the United States the most unusually cold place on the planet, at least so far this year.

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 ...

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

This is because the polar vortex has stretched and sent cold air south into the United States ten times this season. Typically, this might happen only once, maybe two or three times in a normal ...

Computer forecast models say that the polar vortex is likely to stretch again, sending cold air south somewhere and probably to the United States, around March 5, Cohen said.