A winter buzzword, explained.

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in the U.S., and why meteorologists talk about it during major cold events.

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

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

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

During winter in the Northern Hemisphere, the polar vortex can often expand and send cold air south, often referred to as an ...

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

Frigid wind chills of -50 degrees and lower hit parts of the Midwest early this week – with some seeing high temperatures below 0 – all thanks to the polar vortex. But, what the heck is the polar ...

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

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

Central Texas witnessed one of its worst flood events on record during a busy holiday weekend. The combination of heavy rainfall and the hilly terrain led to the extreme rise in rivers and a Flash ...