Weather Alerts For Saint Peters, MO

URGENT - WEATHER MESSAGE National Weather Service St Louis MO 1205 AM CST Thu Dec 25 2025 Warren MO-Saint Charles MO- Including the cities of Saint Charles 1205 AM CST Thu Dec 25 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Saint Charles MO and Warren MO Counties. * WHEN...Until 10 AM CST this morning. * 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. &&