Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...

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

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...

The frigid stream of air that plunged down into the Central U.S. this week is breaking cold records from South Dakota to Texas, with temperatures in the single digits setting records in many locations ...