MARQUETTE— The Upper Peninsula was beset with below freezing temperatures Monday night and into Tuesday, with the warmest ...

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

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

A “polar vortex” is one of those weather terms that gets thrown around during winter outbreaks, but Bishop said it’s something that is always there. Sometimes it can send cold air further south than ...

An Arctic front moved across the Great Lakes on Dec. 3, triggering advisories for snow squalls in New England on Thursday, ...

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 ...

"An active winter-like pattern will continue to bring the threat of winter weather to multiple areas of the country through ...

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

Search to find out how much snow fell near you in Massachusett's during Tuesday's storm, which stretched into Wednesday for ...

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

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