According to a release on Friday at 2:30 p.m. from the National Weather Service Milwaukee/Sullivan Weather Forecast Office:

“Blowing and drifting snow is ongoing due to 35 to 50 mph winds, especially on open/rural roads. Bitterly cold wind chills in the -20 to -35F range will persist into mid Saturday morning. The cold temps and blowing snow are resulting in slick and icy stretches of roads.

The Winter Storm Warning was replaced with a Winter Weather Advisory for south central and southeast Wisconsin. The observed conditions/impacts are turning out to be more of an advisory level rather than warning level. The Winter Weather Advisory is in effect until 9 a.m. 

Plan on pockets of slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions will impact the evening commute. Gusty winds could bring down tree branches and cause power outages. The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 10 minutes.”