Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

A shifting polar vortex will send multiple rounds of Arctic air into the central and eastern United States through the first ...

A polar vortex will bring arctic air and subzero temperatures to parts of the U.S. through the middle of the month, according ...

How does a polar vortex form? It's a normal pattern that tends to contain the coldest weather close to the North Pole. A ...

A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

As we head into the polar vortex, meteorologists are calling for up to a foot of snow in some parts of the U.S.

Milwaukee/Sullivan National Weather Service meteorologist Mark Gehring. Temperatures will tick back up by Friday, Dec. 5, but dip again over the weekend as the next Canadian cold front ...

A "triple dip polar vortex" is coming for portions of the U.S., but Colorado will likely escape its wrath. Here's what ...

Three rounds of cold Arctic air from a shifting polar vortex are expected to plunge much of the central and eastern U.S. into ...

Some light snow is possible across much of New Jersey on Friday night after an Arctic blast of much frigid air could ...

A new wave of intense winter weather is preparing to sweep across the United States, as meteorologists warn that a triple-dip ...