Merrimack River at Concord
Flood levels
Official flood levels at this gauge: action stage begins at 12.0 ft; minor flooding begins at 14.0 ft; moderate flooding begins at 17.0 ft; major flooding begins at 20.0 ft.
| Action stage | 12.0 ft |
|---|---|
| Minor flooding | 14.0 ft |
| Moderate flooding | 17.0 ft |
| Major flooding | 20.0 ft |
Highest recorded crests
- 26.2 ft on Mar 20, 1936 (historic crest)
- 23.0 ft on Sep 22, 1938 (historic crest)
- 20.8 ft on Nov 5, 1927 (historic crest)
- 15.1 ft on May 15, 2006 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 12.0 ft | Minor lowland flooding begins. |
|---|---|
| 14.0 ft | Lowland flooding occurs. |
| 16.0 ft | The parking lot on the east bank downstream of the Route 9 bridge floods. |
| 18.0 ft | Flooding occurs at businesses near the ice arena parking lot. |
Forecast office: NWS Gray · River Forecast Center: Northeast River Forecast Center.
Merrimack River at Concord in your pocket
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Nearby stations and gauges
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- Piscataquog River at Goffstown NWS gauge · 13.3 mi
- South Branch Piscataquog River near Goffstown NWS gauge · 14.5 mi