Three factors are combining to increase the likelihood of a weaker polar vortex this winter, the website reports. And a ...

It’s a term you’ve likely heard a lot about in the news of late: the polar vortex. It might have you thinking of that one scene in “The Day After Tomorrow” of the instantly freezing ice ...

'Polar Vortex' event could bring extreme cold to the U.S. How that affects the forecast in NorCal This pattern could hold through the first half of January.

A researcher expects the polar vortex to strengthen over the next two weeks. This has a big impact on our day-to-day weather here in the Great Lakes region and even the Northeast.

A powerful polar vortex is set to grip much of the United States next week, as seen on a map, with meteorologists predicting plunging temperatures and widespread disruptions.

Harsh weather moved west as a polar vortex was expected to grip the Rockies and the northern Plains after winter storms pummeled the eastern U.S. over the weekend.

The weather during the week of Thanksgiving will get very interesting, with the remnants of a bomb cyclone and a polar vortex within a seven-day span.

But at times some of the vortex can break off or move south, bringing unusually cold weather south and permitting warmer weather to creep up north.

Researchers argue that it's almost impossible to predict the timing of climate tipping points - and that catastrophe could strike at any time in the next 6,000 years.