If traveling this morning, remain aware of localized dense fog
through about 8 am. It mainly extends from northeast Iowa into
southwest and central Wisconsin, along and south of Interstate 90.
Thickest fog and lowest visibilities reside in river valleys.

The fog can rapidly reduce visibilities to 1/4 mile or less.
Expect the fog to dissipate by 8 am.

Slow down and have your headlights on if you encounter the fog.