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

A new study finds the strongest nor'easters have intensified over the last 80 years, with a 6% increase in peak wind speeds.

The Polar Vortex,an atmospheric phenomenon that shapes our winter weather,has been gaining attention as it undergoes changes that could signal a shift in Earth's climate. This high-altitude, rotating ...

Two newly identified patterns in the stratospheric polar vortex can send cold air over North America to cause extreme cold snaps, but the parts of the country that suffer differ between them. Those ...

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 ...

A polar vortex is not visible, even in satellite images, but scientists can track it by measuring the wind speed, temperature, and even the chemistry of the rotating air.

The polar vortex is a circular flow in the stratosphere, which extends from the top of the troposphere to altitudes of about 30 miles. This circular flow forms every fall, and vanishes in spring.

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. The polar vortex is a ...

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.

Warm conditions across much of Europe are forecast to give way to periods of unseasonably cool temperatures and stormy weather during April.