Dense Fog Advisory

FROM: NWS St Louis MO
AREA: Clinton; Marion; Washington; Randolph; St. Clair; Monroe; Jefferson; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; Reynolds
SENT: 2026-02-16T03:32:00-06:00

Dense Fog Advisory issued February 16 at 3:32AM CST until February 16 at 9:00AM CST by NWS St Louis MO

* WHAT…Visibility as low as one quarter mile in dense fog.

* WHERE…Portions of south central and southwest Illinois and east
central and southeast Missouri, particularly in river valleys.

* WHEN…Until 9 AM CST this morning.

* IMPACTS…Low visibility could make driving conditions hazardous.

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

Alert Expiration: 2026-02-16T09:00:00-06:00