Rivers in New Hampshire
Merrimack River at Concord
Below flood stage
4.17ftStage
Observed Wed, Sep 30, 12:30 AM EDT
- Flood stage
- 14.00 ft
- Record crest
- 26.20 ft1936
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 20.00 ft |
| Moderate flood | 17.00 ft |
| Minor flood | 14.00 ft |
| Action | 12.00 ft |
- 18.00 ftFlooding occurs at businesses near the ice arena parking lot.
- 16.00 ftThe parking lot on the east bank downstream of the Route 9 bridge floods.
- 14.00 ftLowland flooding occurs.
- 12.00 ftMinor lowland flooding begins.
Crest history
28 crests on NOAA’s list since 1927.
| # | Date | Stage |
|---|---|---|
| 1 | March 20, 1936 | 26.20 ft |
| 2 | September 22, 1938 | 23.00 ft |
| 3 | November 5, 1927 | 20.80 ft |
| 4 | May 15, 2006 | 15.12 ft |
| 5 | April 6, 1960 | 14.65 ft |
| 6 | April 4, 1951 | 14.40 ft |
| 7 | April 19, 1969 | 14.28 ft |
| 8 | March 28, 1953 | 13.69 ft |
| 9 | March 31, 1998 | 13.63 ft |
| 10 | March 3, 1987 | 13.41 ft |
| 11 | September 18, 1999 | 13.28 ft |
| 12 | December 23, 1973 | 13.03 ft |
| 13 | May 31, 1984 | 12.92 ft |
| 14 | April 20, 1997 | 12.80 ft |
| 15 | April 25, 2001 | 12.67 ft |
| 16 | April 15, 1994 | 12.55 ft |
| 17 | April 15, 2004 | 12.53 ft |
| 18 | May 1, 1988 | 12.41 ft |
| 19 | April 12, 1993 | 12.41 ft |
| 20 | April 16, 2002 | 12.37 ft |
| 21 | April 11, 2000 | 12.34 ft |
| 22 | May 8, 1989 | 12.03 ft |
| 23 | October 8, 1991 | 11.95 ft |
| 24 | April 6, 2005 | 11.86 ft |
| 25 | May 21, 1983 | 11.86 ft |
Most recent crests
- May 15, 2006: 15.12 ft
- April 6, 2005: 11.86 ft
- April 15, 2004: 12.53 ft
- March 31, 2003: 11.31 ft
- April 16, 2002: 12.37 ft
- April 25, 2001: 12.67 ft
- April 11, 2000: 12.34 ft
- September 18, 1999: 13.28 ft
- March 31, 1998: 13.63 ft
- April 20, 1997: 12.80 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northeast River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.