Dense Fog Advisory in effect for Chicago area

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CHICAGO — A Dense Fog Advisory is in effect for the Chicago area (grey-shaded counties on map above) until 9 a.m. this Monday morning.

Visibilities are dropping below a quarter-mile in many areas away from the city and the morning commute will be complicated considerably from all directions leading into Chicago this Monday morning.

Start travel early – allowing plenty of time and be prepared to suddenly encounter pockets of dense fog where  visibility may drop to near zero for short periods.