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Areas of Dense Fog Into This Morning

Four Day Forecast

Areas of fog have developed in portions of northern Illinois, with dense fog most prevalent near and north of the I-88 corridor. The foggy conditions should persist into the morning commute, especially near the Wisconsin state line and then improve by mid morning. Keep a safe following distance and use low beams when driving in dense fog.

Shower and storm activity should generally focus well south of I-80 tonight and Wednesday, before these chances move into the rest of the area late Wednesday into Thursday. A strong warm front will surge north on Friday, possibly accompanied by showers and a few thunderstorms. An unseasonably warm and breezy Friday afternoon and evening will be followed by showers and a chance for thunderstorms Friday night into early Saturday as a cold front moves across the area.