Souhegan River at Merrimack, NH
Is Souhegan River at Merrimack, NH flooding right now?
Souhegan River at Merrimack, NH measured 2.26 ft on 2026-09-11 01:30:00 UTC. That observation was 6.7 ft below its 9 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
2.26 ft
Streamflow
38 cfs
Minor flooding here begins at 9 ft, with major flooding at 13 ft. The highest crest on record was 16.2 ft on Thu, Mar 19, 1936.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 8 ft | 5.7 ft below |
| Minor flood | 9 ft | 6.7 ft below |
| Moderate flood | 11 ft | 8.7 ft below |
| Major flood | 13 ft | 10.7 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 16.2 ft | 1936-03-19 |
| 12.78 ft | 1938-09-21 |
| 12.71 ft | 2007-04-17 |
| 11.82 ft | 1924-04-08 |
| 10.88 ft | 1944-06-25 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Merrimack River near Goffs Falls, below Manchester, NH | 6.6 mi | Hillsborough County |
| Merrimack River at Nashua, NH | 7.2 mi | Hillsborough County |
| Beaver Brook at North Pelham, NH | 9.3 mi | Rockingham County |
| Souhegan River (Site Wlr-1) near Milford, NH | 10.2 mi | Hillsborough County |
| Piscataquog River near Goffstown, NH | 11.2 mi | Hillsborough County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.