Despite being notorious for bringing brutal cold and dangerous wind chills, the polar vortex has a surprising upside.

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

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

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

Environment Canada has issued weather warnings for most of Canada over a 'high or moderate impact level' cold blast that is ...

The term "polar vortex" seems to be popping up in weather forecasts more and more often, ever since North America got blindsided by a stunningly frigid winter back in 2014. The polar vortex isn't a ...

A polar vortex brings bitterly cold Arctic air into southern Ontario. Here’s what it is and what you can expect.