Dense Fog Advisory
Status
New Event Active alertStart Time
Sun 11/23/2025 07:00 PM ESTEnd Time
Mon 11/24/2025 10:00 AM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Saint Louis, MO ∙ Columbia, MO ∙ O'Fallon, MO ∙ Saint Charles, MO ∙ Florissant, MO ∙ Saint Peters, MO ∙ Machens, MO ∙ Thompson, MO ∙ Hagarstown, IL ∙ Pasadena Hills, MOFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service St Louis MO 541 PM CST Sun Nov 23 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST MONDAY... * 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 9 AM CST Monday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Technical Header
ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-241445- /O.NEW.KLSX.FG.Y.0015.251124T0000Z-251124T1500Z/ Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL- Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO- Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO- Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO- Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- Including the cities of Mount Sterling, Chester, Bowling Green, Sparta, Pittsfield, Vandalia, Union, Edwardsville, Farmington, Salem, Centralia, Quincy, Washington, Hannibal, Mexico, Belleville, Saint Charles, Fulton, Jefferson City, Sullivan, Alton, Litchfield, Columbia, Saint Louis, and Cahokia 541 PM CST Sun Nov 23 2025
