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

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

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

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

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

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

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

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

Parts of the Upper Midwest and Northern Plains are already feeling the effects of air spilling in from Canada. On Thursday, ...

After Tuesday’s snow and rain, an icy blast tied to a weakened polar vortex is about to directly strike New England, sending ...