Merrimack River at Goffs Falls, NH
River level and flood forecast · Hillsborough County
The river is 8.4 ft below flood stage (11 ft).
Forecast to rise to 3.8 ft Thu 8 AM, below the 11 ft flood stage.
Flow: 638 cubic feet per second (USGS).
Much lower than normal for October 13.
Usual for October 13: 1,370 to 3,310 cubic feet per second (the middle half of 90 years).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 11:14 AM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Merrimack River at Goffs Falls to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 17 ft |
| Moderate flood stage | 15 ft |
| Flood stage | 11 ft |
| Action stage | 10 ft |
| Record crest (March 20, 1936) | 35.19 ft |
What floods at each level
From the National Weather Service, highest first.
- 20 ftIn Manchester, significant flooding occurs on Riverdale Avenue and Stark Way.
- 17 ftIn Manchester, Stark Way and Riverdale Avenue flood.
- 15 ftLow lying areas of Goffstown...Manchester...Merrimack and Litchfield flood.
- 11 ftLow lying flooding begins.
Highest crests on record
- 35.19 ft — March 20, 1936
- 25.87 ft — September 23, 1938
- 19.87 ft — May 15, 2006
- 17.42 ft — April 6, 1960
- 16.79 ft — April 17, 2007
Recent crests: 11.41 ft (December 19, 2023) · 11.6 ft (April 1, 2010) · 10.83 ft (April 14, 2008) · 16.79 ft (April 17, 2007) · 19.87 ft (May 15, 2006)
Highest flow on record
150,000 cubic feet per second — March 20, 1936. From the USGS's yearly peaks since 1936.
Up and down the river, and nearby
- UpstreamMerrimack River at Franklin Jct., NH
- DownstreamMerrimack River at Nashua, NH
- Piscataquog River at Goffstown, NH
- Souhegan River at Merrimack, NH
- South Branch Piscataquog River near Goffstown, NH
- Beaver Brook at North Pelham, NH
- Spicket River at North Salem, NH
- Souhegan River at Milford, NH
- Lamprey River at Raymond, NH
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (GOFN3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.