In A Nutshell A major study of 42 years of data shows severe winter storms have shifted northwest, away from the traditional ...

We've mentioned the polar vortex several times in recent days. We've said, for instance, that it's "a low pressure system that's usually whirling around the North Pole but has weakened and come ...

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

At right: A strong phase of the polar vortex in mid-November 2013. Dark purple depicts the most frigid air tightly contained in an oval-shaped formation. The light purple line forming the ...

This polar air mass has always been present, but scientists first dubbed it the "polar vortex" in 2014, when a similar (though less severe) cold snap hit a majority of the continental US.

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, ...

During the 2014 January polar vortex, more than 20 people across the country died from the cold as places like Georgia — which rarely see serious cold — dealt with lows under 10 degrees ...

How the chill compares to January 2014 . Many people across the United States may recall the polar vortex episode of early 2014. For the Midwest, it turned out to be the coldest winter in over 30 ...

The science behind the polar vortex is incredibly complicated, ... Something similar happened in the winter of 2014, when the vortex collapsed across the Upper Midwest and much of East Asia, ...