Rivers in New Hampshire
Connecticut River at Dalton
Below flood stage
7.07ftStage
Observed Wed, Sep 30, 12:15 AM EDT
- Flood stage
- 18.00 ft
- Forecast crest
- 7.20 ftWed, Sep 30, 2:00 AM EDT
- Record crest
- 25.60 ft1936
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 23.00 ft |
| Moderate flood | 21.00 ft |
| Minor flood | 18.00 ft |
| Action | 15.00 ft |
- 25.60 ftRecord flood comparable to the flood of 1936.
- 25.00 ftWater reaches US Route 2 Bridge Street in Lancaster, causing major regional travel disruptions. Floodwaters completely isolate several homes.
- 23.00 ftWater flows over US Route 3 in Lancaster near Industrial Park Road. Water also reaches US Route 2 Bridge Street.
- 22.00 ftRoute 135 in Dalton is inundated. Homes flood along Route 135 north of the Johns River.
- 21.00 ftIn Guildhall, VT, Route 102 floods just north of the Route 2 bridge to Lancaster, as well as near Breault Road at the Washburn Brook crossing. In Dalton, Route 135 floods at the public boat launch. Basements flood at a few residences along Route 135 north of the Johns River.
- 20.00 ftFloodwaters cut off access to a few homes along Route 135 in Lancaster. Several riverside camps along Route 135 north of the Johns River are flooded. River Road is underwater between the Mt. Orne Bridge and South Lunenburg.
- 19.00 ftBasements of low-lying homes in Dalton and Lancaster are at risk of flooding. Water begins to encroach on Route 135 at the Dalton public boat launch.
- 18.00 ftWater inundates campgrounds, agricultural fields, and recreational fields off Bridge Street in Lancaster.
- 17.00 ftMinor lowland flooding begins.
Flood outlook
Chance of flooding, October to December
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 28, 2026.
Crest history
57 crests on NOAA’s list since 1936.
| # | Date | Stage |
|---|---|---|
| 1 | March 20, 1936 | 25.60 ft |
| 2 | April 1, 1998 | 23.70 ft |
| 3 | March 19, 1990 | 23.22 ft |
| 4 | March 28, 1953 | 22.38 ft |
| 5 | April 24, 1954 | 22.25 ft |
| 6 | April 17, 2014 | 22.15 ft |
| 7 | April 29, 2011 | 22.07 ft |
| 8 | April 16, 2002 | 21.40 ft |
| 9 | April 25, 2001 | 21.38 ft |
| 10 | May 6, 1972 | 21.34 ft |
| 11 | May 4, 1940 | 21.10 ft |
| 12 | October 18, 2005 | 21.10 ft |
| 13 | April 25, 1996 | 20.86 ft |
| 14 | January 17, 1995 | 20.73 ft |
| 15 | April 23, 1958 | 20.63 ft |
| 16 | April 19, 1969 | 20.58 ft |
| 17 | April 2, 1987 | 20.54 ft |
| 18 | June 1, 1984 | 20.30 ft |
| 19 | April 20, 1960 | 20.26 ft |
| 20 | April 17, 1955 | 20.19 ft |
| 21 | April 7, 1989 | 20.16 ft |
| 22 | April 18, 1994 | 20.06 ft |
| 23 | April 24, 1992 | 19.79 ft |
| 24 | March 31, 1945 | 19.79 ft |
| 25 | April 25, 1974 | 19.78 ft |
Most recent crests
- July 13, 2024: 17.76 ft
- March 8, 2024: 17.86 ft
- December 20, 2023: 17.31 ft
- April 17, 2014: 22.15 ft
- May 26, 2013: 18.18 ft
- April 29, 2011: 22.07 ft
- April 21, 2008: 17.65 ft
- April 25, 2007: 18.35 ft
- October 18, 2005: 21.10 ft
- April 6, 2005: 17.14 ft
Nearby
Upstream, downstream and the gauges around this one.
- UpstreamConnecticut River at North Stratford
- DownstreamConnecticut River at Wells River
- Moose River at Victory
- Ammonoosuc River at Bethlehem
- Sleepers River at St. Johnsbury
- Passumpsic River at Passumpsic
- East Branch of the Passumpsic River at East Haven
- Upper Ammonoosuc River
- Pope Brook (VT) at North Danville
What this means
Forecasts by the Northeast River Forecast Center. Forecasts are issued routinely year-round.
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.