Major Flood
14 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 ft
Action Stage
8 ft
What Floods at Each Level
16 ft
Significant flooding occurs along the brook. Several feet of water cover the Hun athletic fields. Route 206 is closed. Flooding along the brook can worsen if the Delaware and Raritan Canal is also running high.
13 ft
The Hun School athletic fields flood. Flooding along the brook can worsen if the Delaware and Raritan Canal is also running high.
11 ft
Mercer Street, between Province Line Road and the Stony Brook Bridge, is subject to closure due to flooding.
9 ft
Quaker Road floods and it subject to closure. Mercer Street begins to flood.
8 ft
Adjacent floodplain begins to flood including the Stony Brook walking trail.
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 |
|---|---|---|
| Aug 27, 2011 | 16.23 ft | — |
| Aug 27, 1971 | 14.26 ft | 8,960 cfs |
| Sep 16, 1999 | 14.02 ft | 8,780 cfs |
About This Gauge
Get Flood Alerts for Stony Brook
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 Stony Brook at Princeton?
The Stony Brook at Princeton gauge is maintained by USGS (site 01401000) 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 Stony Brook at Princeton?
The NWS-defined flood stage for Stony Brook at Princeton is 9 feet. Action stage begins at 8 feet. Moderate flooding starts at 11 feet, and major flooding at 14 feet.
How do I get alerts when Stony Brook rises?
Download StormCast free on Google Play, go to River Gauges, and add Stony Brook at Princeton 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 Stony Brook at Princeton gauge located?
The gauge is located in Mercer County, New Jersey at coordinates 40.3331°N, 74.6819°W. USGS site number: 01401000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey