Three rounds of cold Arctic air from a shifting polar vortex are expected to plunge much of the central and eastern U.S. into a cold snap in the coming weeks, meteorologists say. The first wave of the ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

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

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 ...

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

A shifting polar vortex will send multiple rounds of Arctic air into the central and eastern United States through the first ...

A growing body of research indicates that polar vortexes are likely becoming more frequent due to the climate crisis.

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 ...

Three polar vortex systems are anticipated in December, and the first is expected this week, according to AccuWeather. The ...

This historic cold wave is expected to sweep across the northern and eastern parts of the country, causing widespread ...

The northeastern US is set to be blasted with the with most extreme cold on Earth later this month, according to shocking new ...

A rare stratospheric event is forecast to unleash bone-chilling air from a weakening vortex across the US and New England, peaking during the first half of December.