Deep penetration of cold temperatures and a coastal storm will bring bomb cyclone and polar vortex into your newsfeeds.

The polar vortex will keep the freezer door wide open during much of Feburary, which will not only keep energy demands and the cost of heating homes and businesses high, but more winter storms will ...

Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.

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

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

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...

Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.

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

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

In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar ...

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