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

A major polar vortex is about to hit the US and could bring weeks of frigid temperatures for millions, with even a chance of ...

Cold temperatures are expected to last through the end of the month — and forecasters say that there's a potential for snow ...

In the coming weeks, cold air will continue for parts of the U.S. thanks to the influence of the polar vortex.

It exists all the time, but it usually gets stronger in winter. When the jet stream (a river of wind) bends and dips south, ...

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

About 230 million people will face temperatures of 20 degrees or colder and about 150 million likely will be hit by snow and ...

Alabama braces for another polar vortex blast bringing well below freezing temperatures. How cold will temperatures get? Here ...

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

Extreme cold and snow smacked the Gulf Coast states this week, but the polar vortex may not be to blame.

On the bright side, we’ve already passed the halfway point of meteorological winter (the three months of December, January, and February) and the sun has been setting later and later every day (sunset ...

Severe winter chill is expected to plunge central and eastern states into below average temperatures as the polar vortex ...