Coastal Flood Advisory

Locations Affected

Santa Rosa, CA ∙ Napa, CA ∙ Petaluma, CA ∙ San Rafael, CA ∙ Novato, CA ∙ Rohnert Park, CA ∙ Fetters Hot Springs-Agua Caliente, CA ∙ Ross, CA ∙ Napa Valley, CA ∙ Santa Rosa Sonoma County Airport, CA

Full Alert Message

Coastal Hazard Message National Weather Service San Francisco CA 857 AM PDT Mon May 18 2026 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT TUESDAY... * WHAT...Up to 0.8 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...North Bay Interior Valleys County. * WHEN...Until 3 AM PDT Tuesday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 0.8 ft above normal (6.66 ft MLLW) at 1:07 AM Tuesday 5/19. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

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