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. Here's the forecast.

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

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

A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

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

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of January.

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

If you couldn’t get enough of the cold temperatures in early December, there’s more on the way for Tennessee this coming ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

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