Ashuelot River near Gilsum, NH
River level and flood forecast · Cheshire County
The river is 7.6 ft below flood stage (9.5 ft).
Flow: 25 cubic feet per second (USGS).
Normal for October 13.
Usual for October 13: 12 to 57 cubic feet per second (the middle half of 77 years).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Ashuelot River near Gilsum to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 12 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 9.5 ft |
| Action stage | 8 ft |
| Record crest (July 11, 2023) | 11.36 ft |
What floods at each level
From the National Weather Service, highest first.
- 12 ftMajor flooding occurs. Properties between Maine Street and Church Street in Gilsum cut off by floodwaters if coinciding high flows on Hayward Brook.
- 11.5 ftRoute 10 near Kinson State Wildlife Area in Marlow vulnerable to flooding.
- 11 ftModerate flooding occurs. Water up to Main Street in Gilsum.
- 10.5 ftGilsum Road between Southwoods Road and New Hampshire Route 12A flooded.
- 10 ftIn Gilsum, Riverside Road flooded and homes cut-off. Howard Road bridge inaccessible from Old Marlow Road.
- 9.5 ftWater up to Spring Street in Gilsum.
- 9 ftWater encroaches on Riverside Road in Gilsum and Greenes Landing Road in Marlow.
- 8.5 ftWater approaches properties along Old Marlow Road in Gilsum.
Highest crests on record
- 11.36 ft — July 11, 2023
Recent crests: 11.36 ft (July 11, 2023)
Highest flow on record
10,200 cubic feet per second — October 9, 2005. From the USGS's yearly peaks since 1923.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (GILN3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.