Forecasters warn that a split polar vortex is set to bring a 'large supply of cold air' to North America in mid-February as a ...

A blast of arctic air from Canada has brought the season's coldest weather to most of the United States. The system, known as a polar vortex, is forecast to bring subzero temperatures to the Midwest, ...

As we continue to warm moving into February, it appears latest trends suggest a classic "what goes up, must come down" type ...

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this ...

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the ...

Most of the US will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ... 50 degrees in some spots across America come Monday morning.” ...

Understanding the Polar Vortex The polar vortex is like a massive whirlpool of frigid air moving around our planet's poles.

But what is a polar vortex? The polar vortex is the jet stream above the Arctic Circle. It is very cold. Most of the time it stays up there, but there are circumstances where it can dip down into ...

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S. One of the most notable and widespread Arctic outbreaks that we have seen ...

The mere mention of the term "polar ... circumpolar vortex is a counterclockwise-spinning (northern hemisphere) swirl of super-cold air in the upper atmosphere that sits atop the North Poles.

Polar vortex and jet stream are both extending ... polar vortex would shift south of the tropospheric jet stream over North America, with the stretched polar vortex corresponding to the shift.