Dense Fog Advisory issued January 24 at 11:32AM CST until January 25 at 12:00PM CST by NWS

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL NOON CST THURSDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri. * WHEN...Until noon CST Thursday.