Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.

After a winter storm this weekend, the polar vortex will return, bringing subzero temperatures to around 80 million people ...

It’s cold, it’s icy and it’s dreaded by Canadians across the country. It’s the polar vortex. Weather specialist Riley Laychuk breaks down what the polar vortex is and why it might not be as scary as ...

When the Polar Vortex is in a weakened state, a jet stream wobble sending polar air into the mid-latitudes becomes more likely.

America is bracing for the coldest arctic blast of the season as a polar vortex is set to bring 'most severe' cold snap and ...

FARGO — The Polar Vortex has become a favorite winter weather buzzword in recent years, despite the fact that only serious meteorologists actually know what it is. The Polar Vortex is not the ...

Above: A Von Karman vortex street downwind of the Canary Island chain in the eastern Atlantic Ocean off the coast of Africa on Feb. 27, 2015. Image credit: NASA Worldview. Editor's note ...