Myriad winter weather alerts and warnings remained in place across the U.S. on Tuesday as multiple states battled storms.

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 ...

Winter storm warnings are in place in several states with heavy snow, freezing rain and dangerously cold temperatures ...

Another Arctic blast has been forecast to bring frigid air to a large section of the United States later in January.