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 ...

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

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

A polar vortex brings frigid temperatures and a light chance of snow Friday. High winds could become dangerous combined with ...

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

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

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

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 ...

The culprit behind the country’s somewhat wacky weather, or at least part of it, is the (aforementioned) probable sudden ...

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