The relentless winter of 2025-26 in the East is about to unleash its most brutal cold outbreak yet.

Forecasters are warning that the breakdown of the polar vortex high above the Arctic will not bring relief from winter, but ...

The bitter cold temperatures that have left a chill over the eastern half of the country aren’t going anywhere, as a major disruption to the Polar Vortex is coming this month.

A powerful winter storm, influenced by a polar vortex, is impacting much of the U.S., bringing heavy snow, ice, and extreme wind chills. Starting in the Rockies, the storm is moving eastward, with ...

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and what might happen next.