If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST /7 PM EST/ THIS EVENING... * WHAT...Periods of visibility one quarter mile or less due to dense fog expected. * WHERE...Portions of central, east central, north central and northeast Illinois and northwest Indiana. * WHEN...Until 6 PM CST /7 PM EST/ this evening. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Visibility may periodically improve and get worse as well as vary over short distances through the duration of the Dense Fog Advisory.