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 ...

When the Polar Vortex is in a weakened state, a jet stream wobble sending polar air into the mid-latitudes becomes more ...

Winter in the CSRA is usually mild overall, but every now and then, we get a taste of true Arctic air. If you’ve ever ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

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

Understanding the Polar Vortex The polar vortex is like a massive whirlpool of frigid air moving around our planet's poles. Think of it as a barrier that, when strong, keeps icy polar air trapped up ...

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 first is the polar jet stream ... In contrast, in the north Arctic sea ice is surrounded by alternating land and ocean: North America, the Atlantic, Eurasia, the Pacific.

The polar vortex is an enormous ring of powerful winds ... pushing 30-40 degrees below normal for tens of millions of people across North America. Brutally cold days and locally historic low ...

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.

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout ...

Current trend in heavy snowfall and bitterly cold temperatures is directly linked to a disruption to the polar vortex caused ...