The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid ...

Although a major winter outbreak is not guaranteed, forecasters are watching for below-average temperatures to develop in the ...

A sudden, dramatic shift in temperatures high in the atmosphere will dance with the La Niña weather pattern. There won't be a clear winner.

The phenomenon, known as a sudden stratospheric warming, it's "the largest type of disruption that occurs to the polar vortex ...

The sun will set at 1:36 p.m. in Utqiaġvik, Alaska, but won’t rise for another 65 days as the polar night sets in.

USCGC Polar Star, the service's only heavy icebreaker, at Coast Guard Base Seattle on Nov. 13, 2025. The ship is preparing to ...

December might be extra chilly this year across parts of the United States this year because of a weather phenomenon ...

But across the country, AccuWeather meteorologists are predicting major travel disruptions as a storm system is set to batter ...

New York could see a return of Arctic air around Thanksgiving as models suggest a possible wobble in the polar vortex, ...

Another Arctic blast is on the move toward the U.S., bringing the potential for bitter cold and heavy snow accumulations to Michigan.

A storm system will move through Oklahoma Tuesday into Tuesday night, Nov. 26, bringing rain across the region.

Wisconsin is in store for a warmer weekend, but could see a return of Arctic air around Thanksgiving as models suggest weakening in the polar vortex.