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

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States.

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

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

Despite being notorious for bringing brutal cold and dangerous wind chills, the polar vortex has a surprising upside.

The atmosphere is a complicated place. Warm temperatures in one spot can contribute to brutally cold storms somewhere else.

After this weekend's snow storm moves out, cold Arctic air will move in.

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

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

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

The incoming Arctic blast will bring very cold temperatures to West Michigan, but it still falls short of the historic, ...

The big winter (and popular) topic is dusted off very early this season as frigid air plunges south next weekend. But what is ...