Light winds and very humid conditions have resulted in areas of fog this morning, some dense, mainly south of I-80 in southeast Iowa, west central Illinois, and northeast Missouri. In places this fog is reducing visibility to near one quarter mile. Expect conditions to gradually improve between 900 AM and 1030 AM as the fog dissipates.
Motorists should exercise caution as visibilities may change suddenly over short distances. Use low beam headlights and leave plenty of distance between you and the vehicle ahead.