SF shoreline flood advisory runs October 9–13; surf hazards overlap
A coastal flood advisory covers San Francisco from 9 a.m. PDT October 9 to 3 p.m. PDT October 13, with dangerous surf forecast from Saturday through Monday.
The National Weather Service’s October 8, 9:45 p.m. PDT bulletin warns of flooding in low-lying shoreline areas from Friday morning through Tuesday afternoon.
Its separate beach-hazards statement runs Saturday morning through Monday afternoon. These are forecast hazards; they are not a report that every waterfront route has closed. [1][2]
At the San Francisco gauge, Saturday’s forecast high tide is 7.3 feet above mean lower low water at 11:50 a.m. PDT. That is a gauge datum, not seven feet of water over a street. The bulletin separately forecasts up to 1.4 feet of inundation in susceptible low-lying areas; local high-tide times can differ by as much as 90 minutes. [1]
For a waterfront weekend, keep away from rocks, jetties and exposed piers, stay out of hazardous surf, and do not drive through water of unknown depth. The October 9 forecast discussion reiterates the threat from sneaker waves and rip currents. Check the current bulletin before setting out: this edition preserves a dated forecast, not live conditions. [2][3]
Sources & details 3 sources
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Reporting sources
- NWS · Coastal Hazard Message, October 8 at 21:45 PDT
Full current bulletin reopened through the official product endpoint after the barrier. Exact advisory interval, gauge datum and local-time variation checked.
- NWS · October 9 Area Forecast Discussion at 04:50 PDT
Original forecaster analysis reiterates the advisory and shoreline precautions. This is the same forecasting institution, not independent meteorological validation.
- San Francisco Chronicle · October 8 shoreline reporting
Aidin Vaziri’s report independently confirms the hazard windows. Its earlier rounded water-level figures are not used in place of the later bulletin; no independent forecast accuracy is claimed.
Images & figures
Seal Rocks and Ocean Beach, San Francisco, 21 August 2019. A view of the shoreline; not a photograph of the current advisory conditions.
© Radomianin / Wikimedia Commons / CC BY-SA 4.0 · Source · CC BY-SA 4.0
Compare daily gauge highs on one zero-based MLLW scale.
Euangelion · original explanatory graphic · Source · Usage terms · Download figure