Polar vortex systems will bring dangerously cold weather to much of the U.S. this month. Learn how to stay safe, and which ...

A blast of Arctic air gripped much of the central and eastern portions of the U.S. on Friday in sub-freezing temperatures ...

Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

Forecasters have said parts of the U.S. can expect frigid temperatures in December. A first round has arrived, and more cold ...

Video from a pier along Lake Michigan on Thursday morning showed thick coats of ice along the railings caused by an arctic ...

As we near peak season for lake-effect snow, there's hardly an ice coverage on the Great Lakes, but that's about to change as ...

Chief Meteorologist Josh Hodell is tracking Arctic air and your weekend forecast. A US aircraft carrier's hard turn to avoid ...

Low temperatures will be dropping into the single digits in northwestern areas and teens elsewhere Thursday night into early ...

If you look up at the sky on a clear day, chances are you'll notice thin, white clouds—also known as contrails—following ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

Amid upheaval across the U.S. in 2025, Associated Press photographers captured images of heartache and hope, celebration and despair and flickering moments of wonder.