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.

Brutal midwinter cold is settling in across the eastern United States, and forecasters say it is not leaving quickly. A ...

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

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

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

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

Climate deniers are quick to say 'I told you so' when the mercury drops. But a warmer planet impacts weather in ways that can ...

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

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

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...