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 ...

A polar air mass from Canada is hovering over Wisconsin on Thursday, Dec. 4, bringing single-digit temperatures and negative 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 ...

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 ...

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

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

Western Pennsylvania temperatures on Friday morning could break the record for the coldest temperature ever recorded on Dec.

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