Update – A Wind Chill Advisory for close-in Chicago and south – Wind Chill Watch for northeast Illinois north and west of Chicago Thursday night into Friday morning

Updated 4PM CST…

A Wind Chill Advisory (light-green shading on map below) for dangerous wind chills 20 to 30-below zero is in effect for close-in Chicago and south of Interstate-80 Thursday night into Friday morning. Northwest winds gusting well over 30 mph along with frigid temperatures falling below zero will set the stage for dangerous wind chills here.

A Wind Chill Watch (dark-green shading on map below) is out for Thursday night and Friday covering the area just to the north and west of ChicagoNorthwest winds gusting over 35 miles per hour on the leading edge of an arctic-source high pressure air mass will produce dangerous wind chills to -30 degrees or colder later Thursday night into Friday morning across northeastern Illinois immediately to the north and west of Chicago. 

During the day Thursday a strong cold front will sweep southeast across our area accompanied by a band of snow and followed by 30 to 40 mph northwest winds that will not only cause blowing and drifting of snow in the air and already on the ground, but also will cause temperatures to fall into single digits by late afternoon/evening and well below zero overnight. The combination of strong winds and frigid temperatures over a thick blanket of snow will produce the forecast -20 to -30-degree  and even colder wind chills.

Counties under the Wind Chill Watch shaded in dark green below…

Map of Forecast Area

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