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

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

What is the polar vortex? Mississippi weekend weather forecast calls for winter storm with lows in the teens, paired with ...

The meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least ...

As a winter storm approaches Western North Carolina and other regions, here's what to know about deciphering forecaster terms ...

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

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

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

A severe winter storm that brought crippling freezing rain, sleet and snow to a large part of the U.S. in late January 2026 left a mess in states from New Mexico to New England. Hundreds of thousands ...

The polar vortex is unleashing an extreme cold wave across the United States, bringing a historic arctic blast, violent ...

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest ...