Dense fog has developed across south central Iowa and is spreading up into central and east central Iowa early tonight. The dense fog will continue to expand and will persist through much of the night and possibly into Thursday morning.
A dense fog advisory is in effect until 9am CST Thursday. Visibilities will be around a quarter mile or less, to near zero at times.
Driving will be hazardous due to low and changing visibilities. Allow extra travel time and please take appropriate precautions while driving.