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

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.

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

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

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

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

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 ...

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

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