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

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

A "polar vortex" is one of those weather terms that gets thrown around during winter outbreaks, but Bishop said it's ...

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

The first of three expected polar vortex systems is predicted to bring frigid temperatures. Here's what is expected in South ...

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 ...

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

A polar air mass from Canada is hovering over Wisconsin on Tuesday, Dec. 3, bringing single-digit temperatures and negative ...

Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

Three polar vortex systems are anticipated in December, and the first is expected this week, according to AccuWeather. The ...

Dr. Amy Butler with the National Oceanic and Atmospheric Administration says the early polar vortex disruption is unusual and ...

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