# Boston king tides and high water in 2011

> In 2011, NOAA's Boston tide gauge recorded water high enough for FloodRoute's model to put at least one Boston road at risk on 54 days. The highest was 13.04 ft on Friday, January 21, 2011, 1.61 ft above the tide tables, with 27 roads at risk, including Chelsea Street, William T. Morrissey Boulevard and Marginal 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 (54)

| Date | High water (Boston gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Jan 2, 2011 | 11.76 | +1.19 ft | 2 | Possible | Chelsea Street |
| Jan 20, 2011 | 12.09 | +0.81 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 21, 2011 | 13.04 | +1.61 ft | 27 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 27, 2011 | 11.95 | +1.71 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 18, 2011 | 12.52 | +1.12 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 19, 2011 | 11.93 | +0.38 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 20, 2011 | 12.08 | +0.64 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 21, 2011 | 12.14 | +0.73 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 22, 2011 | 11.92 | +0.56 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 21, 2011 | 11.81 | +0.02 ft | 2 | Possible | Chelsea Street |
| Mar 22, 2011 | 12.54 | +0.68 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 23, 2011 | 12.55 | +0.89 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 24, 2011 | 12.23 | +1.01 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 16, 2011 | 12.18 | +0.78 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 17, 2011 | 12.28 | +0.42 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 19, 2011 | 12.43 | +0.38 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 20, 2011 | 12.37 | +0.39 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 21, 2011 | 12.09 | +0.41 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 14, 2011 | 11.78 | +0.64 ft | 2 | Possible | Chelsea Street |
| May 15, 2011 | 12.30 | +0.71 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 16, 2011 | 12.63 | +0.77 ft | 12 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 18, 2011 | 12.47 | +0.55 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 19, 2011 | 12.48 | +0.71 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 20, 2011 | 12.11 | +0.66 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 21, 2011 | 11.78 | +0.78 ft | 2 | Possible | Chelsea Street |
| Jun 12, 2011 | 11.83 | +0.69 ft | 2 | Possible | Chelsea Street |
| Jun 13, 2011 | 12.14 | +0.77 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 14, 2011 | 12.43 | +0.93 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 15, 2011 | 12.43 | +0.94 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 17, 2011 | 12.13 | +0.78 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 18, 2011 | 11.85 | +0.76 ft | 2 | Possible | Chelsea Street |
| Jul 13, 2011 | 11.84 | +0.87 ft | 2 | Possible | Chelsea Street |
| Jul 14, 2011 | 11.97 | +1.01 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 28, 2011 | 11.88 | +1.72 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 2, 2011 | 11.76 | +0.23 ft | 2 | Possible | Chelsea Street |
| Sep 27, 2011 | 11.92 | +0.42 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 28, 2011 | 12.42 | +0.49 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 29, 2011 | 12.67 | +0.56 ft | 14 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 30, 2011 | 12.56 | +0.54 ft | 12 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 1, 2011 | 12.46 | +0.76 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 2, 2011 | 12.00 | +0.81 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 26, 2011 | 12.26 | +0.33 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 27, 2011 | 12.70 | +0.46 ft | 14 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 28, 2011 | 12.62 | +0.35 ft | 12 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 29, 2011 | 12.34 | +0.28 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 30, 2011 | 12.19 | +1.76 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 23, 2011 | 12.73 | +1.25 ft | 14 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 24, 2011 | 12.74 | +0.86 ft | 14 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 25, 2011 | 12.22 | +0.15 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 26, 2011 | 12.18 | +0.15 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 27, 2011 | 12.18 | +0.39 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 23, 2011 | 12.51 | +1.09 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 24, 2011 | 11.94 | +0.38 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 25, 2011 | 11.81 | +0.28 ft | 2 | Possible | Chelsea Street |

[All Boston history](https://floodroute.com/ma/boston/history.md) · [Live forecast](https://floodroute.com/ma/boston.md)

Data: [CSV](https://floodroute.com/data/history/ma/boston.csv) · [JSON](https://floodroute.com/data/history/ma/boston.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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