Bitter temperatures are forecast to hit swathes of the U.S. this weekend as a polar vortex—the area of cold air that circulates around the Arctic—expands, with the National Weather Service predicting ...

Frigid air could reach as far south as Central Florida in the coming days, updated forecasts from the NWS suggest.

Alerts for cold weather are in effect for nearly half of the U.S. population, running from the northern Plains to the Gulf Coast and the Rockies to the Southeast.

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...

Forecast high temperatures from the Great Basin and Rockies to the East Coast will be 20-30 degrees below average, ranging from the negative teens and negative single digits in the northern Plains and ...

The majority of the Southeast, South, Southwest, Midwest and Northeast are predicted ... Only the Pacific Northwest, southern ...

Where the cold is now: The surge of colder air has spread into the Plains, Midwest, Northeast and South behind Winter Storm Blair which departed the East Coast Monday night. You can see that in the ...

slippery roads were expected to complicate road conditions in several Midwest states. The National Weather Service said in its Friday morning forecast that a storm heading southeast from Canada was ...