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Updated:November 10, 2026 5:01 am PST

Coastal Flood Advisory COASTAL FLOOD ADVISORY  
Contra Costa County

  Effective: Tue, 11/10 12:19am Severity: Minor
  Updated: November 10, 2026 5:01 am Urgency: Expected
  Expires: Tue, 11/10 12:00pm Certainty: Likely

Areas Affected: San Francisco - North Bay Interior Valleys - San Francisco Bay Shoreline
 
Alert Details:
* WHAT...For the Coastal Flood Advisory, up to 1.6 ft of
inundation above ground level is possible in low-lying areas
near shorelines and tidal waterways.

* WHERE...San Francisco including bayshore locations along the
San Francisco Bay and San Pablo Bay.

* WHEN...For the Coastal Flood Advisory, until 4 PM PST Friday.

* IMPACTS...High tides will result in flooding of low-lying
infrastructure, isolated road closures, and coastal erosion.
Rising tides will bring water and waves farther up the beach
than normal, restricting escape from beaches and coastal
areas. Waves can sweep across the shoreline without warning,
pulling people into the sea from beaches, jetties, and rocks.

* ADDITIONAL DETAILS...At the San Francisco tide gauge, high tide
is expected to be: 1.5 ft above normal (7.3 ft MLLW) at 11:04
AM Tuesday 11/10, 1.4 ft above normal (7.2 ft MLLW) at 11:35 AM
Wednesday 11/11, 1.3 ft above normal (7.1 ft MLLW) at 12:10 PM
Thursday 11/12, 1.1 ft above normal (6.9 ft MLLW) at 12:49 PM
Friday 11/13. These predictions include up to 1.4 ft of surge
that will enhance the astronomical tide and flooding threat.
High tide varies up to 90 minutes earlier or later along the
Pacific Coast and through 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.