# Mill Valley king tides and high water in 1999

> In 1999, NOAA's San Francisco tide gauge recorded water high enough for FloodRoute's model to put at least one Mill Valley road at risk on 17 days. The highest was 7.19 ft on Sunday, July 11, 1999, 0.12 ft above the tide tables, with 9 roads at risk, including Ryan Avenue, Plymouth Avenue and Park Terrace.

**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 (17)

| Date | High water (San Francisco gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Jan 1, 1999 | 6.70 | −0.31 ft | 1 | Possible | Sycamore Avenue |
| Jan 2, 1999 | 6.64 | −0.27 ft | 1 | Possible | Sycamore Avenue |
| Jan 30, 1999 | 6.76 | +0.04 ft | 1 | Possible | Sycamore Avenue |
| Jan 31, 1999 | 6.70 | +0.11 ft | 1 | Possible | Sycamore Avenue |
| Jun 12, 1999 | 6.66 | −0.25 ft | 1 | Possible | Sycamore Avenue |
| Jun 13, 1999 | 6.77 | −0.19 ft | 1 | Possible | Sycamore Avenue |
| Jun 15, 1999 | 6.65 | −0.19 ft | 1 | Possible | Sycamore Avenue |
| Jul 10, 1999 | 6.88 | −0.08 ft | 1 | Possible | Sycamore Avenue |
| Jul 11, 1999 | 7.19 | +0.12 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Jul 12, 1999 | 7.14 | +0.09 ft | 1 | Likely | Sycamore Avenue |
| Jul 14, 1999 | 7.05 | +0.18 ft | 1 | Possible | Sycamore Avenue |
| Jul 15, 1999 | 6.69 | +0.15 ft | 1 | Possible | Sycamore Avenue |
| Aug 9, 1999 | 6.84 | −0.06 ft | 1 | Possible | Sycamore Avenue |
| Aug 10, 1999 | 6.72 | −0.10 ft | 1 | Possible | Sycamore Avenue |
| Dec 21, 1999 | 6.91 | −0.11 ft | 1 | Possible | Sycamore Avenue |
| Dec 22, 1999 | 6.92 | −0.24 ft | 1 | Possible | Sycamore Avenue |
| Dec 23, 1999 | 6.71 | −0.41 ft | 1 | Possible | Sycamore Avenue |

[All Mill Valley history](https://floodroute.com/ca/mill-valley/history.md) · [Live forecast](https://floodroute.com/ca/mill-valley.md)

Data: [CSV](https://floodroute.com/data/history/ca/mill-valley.csv) · [JSON](https://floodroute.com/data/history/ca/mill-valley.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/mill-valley/history/1999 · 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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