Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Bitingly cold Arctic air keeps pummeling the U.S. with ruthless cold snaps—despite warming winters nationwide. A study explains why: the solution lies far above your head, in the upper atmosphere ...

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 swirling ...

The United States has been at the epicenter of the planet’s most unusually cold conditions early in 2025. The polar vortex is ...