Weather Alerts For Cotati, CA

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 1019 PM PST Thu Jan 15 2026 North Bay Interior Valleys- 1019 PM PST Thu Jan 15 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM PST FRIDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...North Bay Interior Valleys. * WHEN...Until 9 AM PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your low beam headlights, and leave plenty of distance ahead of you. Patchy dense fog will result in sudden changes in visibility. Visibility at times will fall below one-quarter of a mile. Use your low beam headlights, slow down, and be prepared for periods of hazardous driving conditions. &&