Dense Fog Advisory

Locations Affected

Santa Rosa, CA ∙ Napa, CA ∙ Petaluma, CA ∙ Novato, CA ∙ San Rafael, CA ∙ Healdsburg, CA ∙ Larkspur, CA ∙ Bloomfield, CA ∙ Strawberry, CA ∙ Saint Helena, CA

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 254 AM PDT Thu Oct 16 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Visibility below one-quarter of a mile in dense fog. * WHERE...North Bay Interior Valleys. * WHEN...Until 10 AM PDT this morning. * 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. If commuting, allow extra drive time to reach your destination safely.

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