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

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

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

The bitter cold temperatures that have left a chill over the eastern half of the country aren't going anywhere, as a major ...

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

A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

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

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 ...

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

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

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