California Minor Coastal Flood Advisory | Effective 09/03/2026 23:21

Headline: 
Coastal Flood Advisory issued September 3 at 11:21PM PDT until September 4 at 9:00PM PDT by NWS San Francisco CA
Event: 
Coastal Flood Advisory
Urgency: 
Expected
Effective: 
September 3, 2026 - 11:21pm
Expires: 
September 4, 2026 - 9:00am
Description: 
* WHAT...Up to 0.7 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along the San Pablo Bay in Marin, Sonoma, and Napa counties. * WHEN...From 4 PM to 9 PM PDT Friday. * IMPACTS...Minor 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 0.7 ft above normal (6.5 ft MLLW) at 5:27 PM 9/4. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
Instruction: 
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.
Area Description: 
North Bay Interior Valleys
Forcast Office: 
NWS San Francisco CA
Sender: 
w-nws.webmaster@noaa.gov