If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.
DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST WEDNESDAY...
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Portions of northwest Illinois and east central,
northeast, and southeast Iowa.
* WHEN...Until 9 AM CST Wednesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Visibilities may change suddenly over very
short distances.