A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

If you've ever wondered why winter sometimes flips from mild to brutally cold, the answer might be hiding 20 miles above your head. That's where a rare atmospheric phenomenon called sudden ...

Another Arctic blast is on the move toward the U.S., bringing the potential for bitter cold in Massachusetts. The Climate Prediction Center (CPC) is forecasting a weakening of the polar vortex, which ...

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