California - United States   2026-11-13   Friday   38.51N, -122.47W

St. Helena

California - United States
2026-11-13

Coastal Flood Advisory issued November 12 at 2:58PM PST until November 13 at 4:00PM PST by NWS San Francisco CA

Issue date: 2026-11-12T22:58+00:00

* WHAT...Up to 1.5 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline. * WHEN...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. * ADDITIONAL DETAILS...At the San Francisco tide gauge, high tide is expected to be: 1.5 ft above normal (7.3 ft MLLW) at 12:49 PM Friday 11/13. These predictions include up to 1.8 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.