Milwaukee faced extreme wind chills and a cold weather advisory, with a slight chance of snow and low temperatures forecasted.

The Milwaukee County Medical Examiner's office is investigating the death of an 80-year-old man who likely died of hypothermia early Sunday morning.

The advisory is in effect for most counties 3 a.m. Sunday until noon Tuesday. It begins for several others, including Milwaukee, at 6 p.m. Sunday.

As wind chills hit dangerous levels, the decision to close schools becomes critical. Kevin Wagner, a lead meteorologist with the National Weather Service, explains how those decisions are made.

An "artic air mass" will be moving into the region from Canada as we head into the weekend, causing temperatures to tumble.

Milwaukee had its coldest Jan. 21 since 1984 on Tuesday as the city, along with the rest of the state, was under a dangerous Extreme Cold Warning. According to Milwaukee-Sullivan National Weather Service meteorologist Taylor Patterson,

Light snow showers will move across southern Wisconsin until 2 or 3 a.m. on Thursday, amounting to up to two inches of snow.

Roughly 40 million people from Texas to the Carolinas are under winter weather alerts as a rare winter storm amid bone-chilling temperatures brings potentially historic snowfall to cities unused to harsh,

Temperatures could be as low as -10 in Milwaukee on Tuesday. Where in the world is colder than the Cream City today?

Several Milwaukee-area services, resources and programs won't be available Tuesday due to the extreme cold. Many area schools, including Milwaukee Public Schools, have also already announced Tuesday closures.

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout the Milwaukee area closed as the area braced for the dangerous freezing temperatures. But is Wisconsin in a polar vortex? And what is a polar vortex anyways? Here's what to know.