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

A stretched polar vortex will bring subzero temperatures and heavy snow to 230 million Americans. Michigan utility customers ...

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 ...

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

The greater Philadelphia region will experience no weekend letup in the prolonged cold snap gripping the area.

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

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

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

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

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

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