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

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 disrupted polar vortex is expected to keep Arctic air locked over the region ...

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.

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

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

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

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.

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

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