Dense Fog Advisory issued January 02 at 1:35AM CST until January 02 at 9:00AM CST by NWS

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of southwest and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...Until 9 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.