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

Cold air breezes over North America as a result of two new patterns identified in the stratospheric polar vortex, countering ...

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 ...

The mechanism involves atmospheric waves that bounce between the upper atmosphere and ground level, amplifying weather ...

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

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

The polar vortex – everyone's favorite wintertime whipping boy – is actually a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole ...

The polar vortex is a broad region of freezing air that lives above the North Pole. It can make for frigid weather when the jet stream, which usually holds it in place, bends and lets that cold ...

The polar vortex split will help cause temperatures to plummet and potentially set the stage for some snowstorms. A recent strong "sudden stratospheric warming" event has caused the vortex to weaken.

We've mentioned the polar vortex several times in recent days. We've said, for instance, that it's "a low pressure system that's usually whirling around the North Pole but has weakened and come ...

In a year without much winter weather, there’s a chance of a bitter blow before spring takes hold. Experts say a disruption of the polar vortex could unleash cold, stormy conditions to the ...