The polar vortex is a broad, fast ribbon of cold air that encapsulates the Arctic high in the stratosphere. Stable, it ...

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it and how does it impact our weather? The polar vortex is like a ...

Bitter cold is expected across much of the U.S. this weekend. But what do headlines mean when they say a "polar vortex cold snap" is on the way? The polar vortex is a regular feature of Earth's polar ...

The polar vortex is starting to stir up, bringing the earliest hints that the seasons are changing. When will Ohio see its first freeze?

The most bone-chilling blasts of cold air experienced in the United States can be blamed on a weather phenomenon that typically dominates a region nearly 3,000 miles away -- all the way north up in ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. A wildfire camera caught the moments when a ...

Chicagoans are no strangers to cold weather, but some of the terminology used to describe frigid conditions can be confusing. That’s why experts from the National Weather Service’s Chicago office — ...