* WHAT...Visibility one quarter mile or less at times in dense fog.
* WHERE...Portions of northern Indiana, southwest Michigan, and northwest Ohio.
* WHEN...Until 9 AM EDT /8 AM CDT/ this morning.
* IMPACTS...Rapidly changing visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Areas of fog will persist into the morning commute in many locations. Rapidly changing visibilities, as low as a few hundred feet, may occur at times resulting in hazardous conditions. This could become more widespread near or shortly after sunrise before lifting by mid morning.