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Updated:December 4, 2025 9:01 pm PST

Coastal Flood Advisory COASTAL FLOOD ADVISORY  
Alameda County

Effective: Thu, 12/4 12:02pm Severity: Minor
Updated: December 4, 2025 9:01 pm Urgency: Expected
Expires: Fri, 12/5 5:00am Certainty: Likely

Areas Affected: San Francisco - North Bay Interior Valleys - San Francisco Bay Shoreline - Northern Monterey Bay - Southern Monterey Bay and Big Sur Coast
 
Alert Details:
* WHAT...Up to 1.4 ft of inundation above ground level is
possible in low lying areas near shorelines and tidal
waterways.

* WHERE...Bayshore locations along San Francisco and Monterey
Bay.

* WHEN...Until 3 PM PST Sunday.

* IMPACTS...Flooding of lots, parks, and roads with only
isolated road closures expected.

* ADDITIONAL DETAILS...The San Francisco tidal gauge high tide is
expected to be 1.4 ft above normal (7.23 ft MLLW) at 10:35 AM
Friday, 1.2 ft above normal (7.08 ft MLLW) at 11:25 AM Saturday,
and 0.9 ft above normal (6.75 ft MLLW) at 12:17 PM Sunday. High
tide timing varies up to 90 minutes earlier or later along the
Pacific Coast and throughout the San Francisco Bay respectively.

Information:
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.