The polar vortex has become more dangerous due to climate change. It hit much of the US in December. Douglas A. McIntyre ...

Winter isn't just knocking anymore. It's kicked the door wide open and brought the polar vortex along for the ride. If you've ...

The planet's most extreme cold air will be barreling into the central and eastern United States this coming weekend "like a ...

This cold blast could be relatively short-lived, with a return to more typical wintry temperatures by later in December.

Feeling that sudden chill? A triple polar vortex is sweeping across parts of the U.S. Here’s what that means — and where it’s ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

More Arctic air is building over northern Canada and will be directed into the United States, courtesy of the polar vortex. How long will the cold waves last? Will it stay cold through Christmas?

Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

The Pacific Northwest is expected to see up to seven inches of rain this week, as the eastern United States braces for arctic ...

The central and eastern United States are bracing for an extraordinary cold snap just ahead of Christmas, according to a ...

Computer models predict that the U.S. will get blasted with extreme cold in December. How will the Pensacola area be impacted ...