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 ...

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

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 ...

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

The extreme cold that has gripped much of the eastern United States this winter shows no immediate signs of relenting, as a significant disruption to the Polar Vortex is expected to occur later in ...

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

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

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.

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