# San Francisco king tides and high water in 2011

> In 2011, NOAA's San Francisco tide gauge recorded water high enough for FloodRoute's model to put at least one San Francisco road at risk on 8 days. The highest was 7.67 ft on Sunday, March 20, 2011, 1.56 ft above the tide tables, with 6 roads at risk, including Townsend Street, Mission Bay Drive and Channel Street.

**Estimates, not records of actual flooding.** Each day is NOAA's verified high water at the tide gauge, run through FloodRoute's flood model on today's roads and elevations, in dry weather. Drains, levees, tide gates, rain, road changes and elevation error all mean real conditions differed. Not for property, real-estate, insurance, lending, engineering or legal decisions.

## Every day with roads at risk (8)

| Date | High water (San Francisco gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Jan 2, 2011 | 7.14 | +0.47 ft | 2 | Possible | Townsend Street |
| Mar 20, 2011 | 7.67 | +1.56 ft | 6 | Likely | Townsend Street, Mission Bay Drive, Channel Street |
| Mar 21, 2011 | 7.21 | +0.87 ft | 2 | Possible | Townsend Street |
| Mar 23, 2011 | 7.13 | +0.78 ft | 2 | Possible | Townsend Street |
| May 16, 2011 | 7.49 | +0.76 ft | 2 | Possible | Townsend Street |
| May 17, 2011 | 7.53 | +0.83 ft | 5 | Possible | Townsend Street, Mission Bay Drive, Channel Street |
| Nov 23, 2011 | 7.14 | +0.28 ft | 2 | Possible | Townsend Street |
| Nov 24, 2011 | 7.40 | +0.34 ft | 2 | Possible | Townsend Street |

[All San Francisco history](https://floodroute.com/ca/san-francisco/history.md) · [Live forecast](https://floodroute.com/ca/san-francisco.md)

Data: [CSV](https://floodroute.com/data/history/ca/san-francisco.csv) · [JSON](https://floodroute.com/data/history/ca/san-francisco.json) · Open Database License (ODbL) 1.0 (https://opendatacommons.org/licenses/odbl/1-0/) · Credit: FloodRoute (floodroute.com), © OpenStreetMap contributors, NOAA CO-OPS · [All towns](https://floodroute.com/data.md)

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Web version: https://floodroute.com/ca/san-francisco/history/2011 · Site index for AI agents: https://floodroute.com/llms.txt · Every page is available as Markdown: add `.md` to its URL.

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