Weather Alerts For Byrnes Mill, MO

URGENT - WEATHER MESSAGE National Weather Service St Louis MO 928 PM CST Fri Dec 26 2025 Clinton IL-Washington IL-Randolph IL-Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Boone 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- Including the cities of Edwardsville, Saint Charles, Jefferson City, Belleville, Columbia, Cahokia, Washington, Saint Louis, Fulton, Chester, Sullivan, Sparta, Union, and Alton 928 PM CST Fri Dec 26 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST SATURDAY... * WHAT...Visibility less than one mile in dense fog. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...Until 9 AM CST Saturday. * 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. &&