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

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

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.

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

As another winter storm hits South Carolina and other regions, here's what to know about deciphering forecaster terms.

It is there year round, but weakens during the summertime and strengthens in the winter.

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

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

The meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least ...

A snowstorm and harsh winter weather have impacted at least 177 million people across the US ...

The polar vortex will push Artic air south, and a severe winter storm could follow. How cold will it get in Louisiana?