Major Flood
12 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
11 ft
Minor Flood
9.5 ft
Action Stage
8 ft
What Floods at Each Level
12 ft
Major flooding occurs. Properties between Maine Street and Church Street in Gilsum cut off by floodwaters if coinciding high flows on Hayward Brook.
11.5 ft
Route 10 near Kinson State Wildlife Area in Marlow vulnerable to flooding.
11 ft
Moderate flooding occurs. Water up to Main Street in Gilsum.
10.5 ft
Gilsum Road between Southwoods Road and New Hampshire Route 12A flooded.
10 ft
In Gilsum, Riverside Road flooded and homes cut-off. Howard Road bridge inaccessible from Old Marlow Road.
9.5 ft
Water up to Spring Street in Gilsum.
9 ft
Water encroaches on Riverside Road in Gilsum and Greenes Landing Road in Marlow.
8.5 ft
Water approaches properties along Old Marlow Road in Gilsum.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jul 11, 2023 | 11.36 ft | 7,356 cfs |
About This Gauge
USGS Site
NWS LID
GILN3
River
Ashuelot River
County
Cheshire, NH
Coordinates
43.0392°N, 72.2701°W
Get Flood Alerts for Ashuelot River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Ashuelot River near Gilsum?
The Ashuelot River near Gilsum gauge is maintained by USGS (site 01157000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Ashuelot River near Gilsum?
The NWS-defined flood stage for Ashuelot River near Gilsum is 9.5 feet. Action stage begins at 8 feet. Moderate flooding starts at 11 feet, and major flooding at 12 feet.
How do I get alerts when Ashuelot River rises?
Download StormCast free on Google Play, go to River Gauges, and add Ashuelot River near Gilsum to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Ashuelot River near Gilsum gauge located?
The gauge is located in Cheshire County, New Hampshire at coordinates 43.0392°N, 72.2701°W. USGS site number: 01157000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Ashuelot River
On This River
Downstream: Ashuelot River below Surry Mt. Dam
More Resources
Source & Notes
Data provided by: USGS Station Information