As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

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

As a winter storm approaches Western North Carolina and other regions, here's what to know about deciphering forecaster terms ...

After this weekend's snow storm moves out, cold Arctic air will move in.

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

CLEVELAND — The temperature outside was so cold that your fingers, toes, nose and cheeks felt like they were burning. A harsh Arctic cold wave brought record-breaking temperatures to the United States ...

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 ...