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Updated:June 15, 2026 9:15 pm PDT

Coastal Flood Advisory COASTAL FLOOD ADVISORY  
Contra Costa County

Effective: Mon, 6/15 2:35pm Severity: Minor
Updated: June 15, 2026 9:15 pm Urgency: Expected
Expires: Tue, 6/16 6:00am Certainty: Likely

Areas Affected: North Bay Interior Valleys - San Francisco Bay Shoreline
 
Alert Details:
* WHAT...Up to 1.8 ft of inundation above ground level is
possible in low-lying areas near shorelines and tidal
waterways.

* WHERE...Low-lying bayshore regions along the San Francisco and
San Pablo Bays.

* WHEN...Until 5 AM PDT Thursday.

* 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 1.8 ft above normal (7.6 ft MLLW) at
12:02 AM on Tuesday, and 1.7 ft above normal (7.5 ft MLLW) at
12:56 AM on Wednesday, 1.2 ft above normal (7.1 ft MLLW) at
1:51 AM on Thursday. 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.