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 ...

Every winter, millions of people brace for news about the polar vortex - that vast, spinning mass of frigid Arctic air high in the stratosphere that occasionally escapes its usual boundaries and ...

There is a major weather pattern change underway across the U.S. As we get into next week, the storm track looks really interesting. Major upper-air pattern changes are quite normal. Sometimes we have ...

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 ...

A cold front will bring plunging temperatures and snow to the Northeast this week. Polar vortex disruptions, caused by Sudden Stratospheric Warming, drive extreme cold southward. Officials advise ...