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| San Mateo County | ||
| Effective: Wed, 7/15 3:38am | Severity: Minor | |
| Updated: July 15, 2026 1:00 pm | Urgency: Expected | |
| Expires: Thu, 7/16 4:00am | Certainty: Likely | |
| Areas Affected: San Francisco - North Bay Interior Valleys - San Francisco Bay Shoreline | ||
Alert
Details:
* WHAT...Up to 1.5 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along the San Francisco and San Pablo Bays. * WHEN...Until 4 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 1.5 ft above normal (7.3 ft MLLW) at 12:48 AM 7/16. These predictions include both astronomical tides and roughly 3-6 inches of additional water mainly from a combination of thermal expansion and accumulated sea level rise since the tidal datum was established (1983-2001). 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. |
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