Major Flood
12 ft
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
10 ft
Minor Flood
9.5 ft
Action Stage
8.5 ft
What Floods at Each Level
12 ft
Major flooding occurs. Comparable to July 2019 flood.
10 ft
Moderate flooding occurs. Sculptured Rocks Road flooded north of Groton.
9.5 ft
Minor flooding occurs. North Shore Road from Grey Rocks Road to Cross Road flooded in Hebron. Braley Road north of Groton Road also flooded in Hebron.
9 ft
Flooding occurs in Grey Rocks Conservation area.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Oct 29, 2017 | 11.82 ft | 7,900 cfs |
| Aug 27, 2011 | 11.17 ft | 5,260 cfs |
| Dec 22, 2022 | 9.75 ft | 3,500 cfs |
About This Gauge
USGS Site
NWS LID
GRTN3
River
Cockermouth River
County
Grafton, NH
Coordinates
43.7039°N, 71.8333°W
Get Flood Alerts for Cockermouth 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 Cockermouth River at Groton?
The Cockermouth River at Groton gauge is maintained by USGS (site 01077400) 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 Cockermouth River at Groton?
The NWS-defined flood stage for Cockermouth River at Groton is 9.5 feet. Action stage begins at 8.5 feet. Moderate flooding starts at 10 feet, and major flooding at 12 feet.
How do I get alerts when Cockermouth River rises?
Download StormCast free on Google Play, go to River Gauges, and add Cockermouth River at Groton 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 Cockermouth River at Groton gauge located?
The gauge is located in Grafton County, New Hampshire at coordinates 43.7039°N, 71.8333°W. USGS site number: 01077400. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: USGS Station Information