To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

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

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

Extremely cold air is going to take over Michigan, as the center of the Polar Vortex drops far south. The center of this ...

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

A crippling winter storm that could paralyze parts of the Southern and Central U.S. this weekend, and some of the effects ...

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

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 ...

A polar vortex system is expected to bring two or more cold waves to Florida this week. Temperatures in North Florida could drop into the upper 20s, with a chance of frost or freeze. Central and South ...

Frigid temperatures and high winds Friday could bring a snow squall to Bucks County as a polar vortex moves through the central and eastern United States. Arctic winds will bring gusts of up to 25-35 ...

Memphis is gearing up for another round of cold temperatures the weekend of Dec. 13 and 14. The Eastern United States will experience a polar vortex, and it will impact most of Tennessee. A polar ...

Bitterly cold temperatures have hit the Greater Toronto Area, and while there's a brief reprieve on Wednesday, the chilly ...