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

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

Deep penetration of cold temperatures and a coastal storm will bring bomb cyclone and polar vortex into your newsfeeds.

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of January.

Despite being notorious for bringing brutal cold and dangerous wind chills, the polar vortex has a surprising upside.

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

A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

Ben Gelber, a meteorologist for NBC4 in Columbus, Ohio, and a Pocono native, said the polar vortex is a large, circular pool ...

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.