Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States ...

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" sends a devastating blast of Arctic air, bringing heavy snows and freezing ...

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

Add Yahoo as a preferred source to see more of our stories on Google. Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across ...

The term "polar vortex" seems to be popping up in weather forecasts more and more often, ever since North America got blindsided by a stunningly frigid winter back in 2014. The polar vortex isn't a ...

Environment Canada has issued weather warnings for most of Canada over a 'high or moderate impact level' cold blast that is ...

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

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S. When Arctic air surges into the U.S., the polar vortex ...