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Hydrograph River at a Glance Download
Stony Brook at Princeton Stage (ft)Flow (kcfs)Observed: 2.14 ft at 8:15PM May 13, 2022Observed: 2.14 ft at 8:30PM May 13, 2022Observed: 2.14 ft at 8:45PM May 13, 2022Observed: 2.13 ft at 9:00PM May 13, 2022Observed: 2.13 ft at 9:15PM May 13, 2022Observed: 2.13 ft at 9:30PM May 13, 2022Observed: 2.13 ft at 9:45PM May 13, 2022Observed: 2.13 ft at 10:00PM May 13, 2022Observed: 2.13 ft at 10:15PM May 13, 2022Observed: 2.13 ft at 10:30PM May 13, 2022Observed: 2.13 ft at 10:45PM May 13, 2022Observed: 2.13 ft at 11:00PM May 13, 2022Observed: 2.13 ft at 11:15PM May 13, 2022Observed: 2.13 ft at 11:30PM May 13, 2022Observed: 2.13 ft at 11:45PM May 13, 2022Observed: 2.13 ft at 12:00AM May 14, 2022Observed: 2.12 ft at 12:15AM May 14, 2022Observed: 2.12 ft at 12:30AM May 14, 2022Observed: 2.12 ft at 12:45AM May 14, 2022Observed: 2.12 ft at 1:00AM May 14, 2022Observed: 2.12 ft at 1:15AM May 14, 2022Observed: 2.11 ft at 1:30AM May 14, 2022Observed: 2.11 ft at 1:45AM May 14, 2022Observed: 2.11 ft at 2:00AM May 14, 2022Observed: 2.11 ft at 2:15AM May 14, 2022Observed: 2.11 ft at 2:30AM May 14, 2022Observed: 2.11 ft at 2:45AM May 14, 2022Observed: 2.11 ft at 3:00AM May 14, 2022Observed: 2.11 ft at 3:15AM May 14, 2022Observed: 2.11 ft at 3:30AM May 14, 2022Observed: 2.11 ft at 3:45AM May 14, 2022Observed: 2.11 ft at 4:00AM May 14, 2022Observed: 2.11 ft at 4:15AM May 14, 2022Observed: 2.11 ft at 4:30AM May 14, 2022Observed: 2.11 ft at 4:45AM May 14, 2022Observed: 2.11 ft at 5:00AM May 14, 2022Observed: 2.11 ft at 5:15AM May 14, 2022Observed: 2.11 ft at 5:30AM May 14, 2022Observed: 2.11 ft at 5:45AM May 14, 2022Observed: 2.11 ft at 6:00AM May 14, 2022Observed: 2.11 ft at 6:15AM May 14, 2022Observed: 2.11 ft at 6:30AM May 14, 2022Observed: 2.11 ft at 6:45AM May 14, 2022Observed: 2.11 ft at 7:00AM May 14, 2022Observed: 2.11 ft at 7:15AM May 14, 2022Observed: 2.11 ft at 7:30AM May 14, 2022Observed: 2.11 ft at 7:45AM May 14, 2022Observed: 2.11 ft at 8:00AM May 14, 2022Observed: 2.11 ft at 8:15AM May 14, 2022Observed: 2.1 ft at 8:30AM May 14, 2022Observed: 2.1 ft at 8:45AM May 14, 2022Observed: 2.1 ft at 9:00AM May 14, 2022Observed: 2.1 ft at 9:15AM May 14, 2022Observed: 2.1 ft at 9:30AM May 14, 2022Observed: 2.1 ft at 9:45AM May 14, 2022Observed: 2.1 ft at 10:00AM May 14, 2022Observed: 2.1 ft at 10:15AM May 14, 2022Observed: 2.1 ft at 10:30AM May 14, 2022Observed: 2.1 ft at 10:45AM May 14, 2022Observed: 2.11 ft at 11:00AM May 14, 2022Observed: 2.11 ft at 11:15AM May 14, 2022Observed: 2.11 ft at 11:30AM May 14, 2022Observed: 2.11 ft at 11:45AM May 14, 2022Observed: 2.11 ft at 12:00PM May 14, 2022Observed: 2.11 ft at 12:15PM May 14, 2022Observed: 2.11 ft at 12:30PM May 14, 2022Observed: 2.11 ft at 12:45PM May 14, 2022Observed: 2.11 ft at 1:00PM May 14, 2022Observed: 2.11 ft at 1:15PM May 14, 2022Observed: 2.11 ft at 1:30PM May 14, 2022Observed: 2.11 ft at 1:45PM May 14, 2022Observed: 2.12 ft at 2:00PM May 14, 2022Observed: 2.13 ft at 2:15PM May 14, 2022Observed: 2.13 ft at 2:30PM May 14, 2022Observed: 2.14 ft at 2:45PM May 14, 2022Observed: 2.15 ft at 3:00PM May 14, 2022Observed: 2.15 ft at 3:15PM May 14, 2022Observed: 2.19 ft at 3:30PM May 14, 2022Observed: 2.24 ft at 3:45PM May 14, 2022Observed: 2.27 ft at 4:00PM May 14, 2022Observed: 2.3 ft at 4:15PM May 14, 2022Observed: 2.37 ft at 4:30PM May 14, 2022Observed: 2.47 ft at 4:45PM May 14, 2022Observed: 2.55 ft at 5:00PM May 14, 2022Observed: 2.6 ft at 5:15PM May 14, 2022Observed: 2.62 ft at 5:30PM May 14, 2022Observed: 2.62 ft at 5:45PM May 14, 2022Observed: 2.61 ft at 6:00PM May 14, 2022Observed: 2.61 ft at 6:15PM May 14, 2022Observed: 2.61 ft at 6:30PM May 14, 2022Observed: 2.61 ft at 6:45PM May 14, 2022Observed: 2.61 ft at 7:00PM May 14, 2022Observed: 2.6 ft at 7:15PM May 14, 2022Observed: 2.59 ft at 7:30PM May 14, 2022Observed: 2.59 ft at 7:45PM May 14, 2022Observed: 2.58 ft at 8:00PM May 14, 2022Observed: 2.58 ft at 8:15PM May 14, 2022Observed: 2.57 ft at 8:30PM May 14, 2022Observed: 2.57 ft at 8:45PM May 14, 2022Observed: 2.57 ft at 9:00PM May 14, 2022Observed: 2.57 ft at 9:15PM May 14, 2022Observed: 2.57 ft at 9:30PM May 14, 2022Observed: 2.57 ft at 9:45PM May 14, 2022Observed: 2.57 ft at 10:00PM May 14, 2022Observed: 2.57 ft at 10:15PM May 14, 2022Observed: 2.57 ft at 10:30PM May 14, 2022Observed: 2.57 ft at 10:45PM May 14, 2022Observed: 2.57 ft at 11:00PM May 14, 2022Observed: 2.57 ft at 11:15PM May 14, 2022Observed: 2.57 ft at 11:30PM May 14, 2022Observed: 2.57 ft at 11:45PM May 14, 2022Observed: 2.57 ft at 12:00AM May 15, 2022Observed: 2.57 ft at 12:15AM May 15, 2022Observed: 2.59 ft at 12:30AM May 15, 2022Observed: 2.61 ft at 12:45AM May 15, 2022Observed: 2.63 ft at 1:00AM May 15, 2022Observed: 2.66 ft at 1:15AM May 15, 2022Observed: 2.69 ft at 1:30AM May 15, 2022Observed: 2.7 ft at 1:45AM May 15, 2022Observed: 2.71 ft at 2:00AM May 15, 2022Highest Observation: 2.72 ft at 2:15AM May 15, 2022Highest Observation: 2.72 ft at 2:30AM May 15, 2022Observed: 2.71 ft at 2:45AM May 15, 2022Observed: 2.71 ft at 3:00AM May 15, 2022Observed: 2.71 ft at 3:15AM May 15, 2022Observed: 2.71 ft at 3:30AM May 15, 2022Observed: 2.71 ft at 3:45AM May 15, 2022Observed: 2.71 ft at 4:00AM May 15, 2022Observed: 2.7 ft at 4:15AM May 15, 2022Observed: 2.7 ft at 4:30AM May 15, 2022Observed: 2.69 ft at 4:45AM May 15, 2022Observed: 2.69 ft at 5:00AM May 15, 2022Observed: 2.68 ft at 5:15AM May 15, 2022Observed: 2.67 ft at 5:30AM May 15, 2022Observed: 2.67 ft at 5:45AM May 15, 2022Observed: 2.66 ft at 6:00AM May 15, 2022Observed: 2.66 ft at 6:15AM May 15, 2022Observed: 2.65 ft at 6:30AM May 15, 2022Observed: 2.64 ft at 6:45AM May 15, 2022Observed: 2.64 ft at 7:00AM May 15, 2022Observed: 2.63 ft at 7:15AM May 15, 2022Observed: 2.62 ft at 7:30AM May 15, 2022Observed: 2.62 ft at 7:45AM May 15, 2022Observed: 2.61 ft at 8:00AM May 15, 2022Observed: 2.61 ft at 8:15AM May 15, 2022Observed: 2.6 ft at 8:30AM May 15, 2022Observed: 2.59 ft at 8:45AM May 15, 2022Observed: 2.59 ft at 9:00AM May 15, 2022Observed: 2.58 ft at 9:15AM May 15, 2022Observed: 2.57 ft at 9:30AM May 15, 2022Observed: 2.57 ft at 9:45AM May 15, 2022Observed: 2.56 ft at 10:00AM May 15, 2022Observed: 2.55 ft at 10:15AM May 15, 2022Observed: 2.55 ft at 10:30AM May 15, 2022Observed: 2.54 ft at 10:45AM May 15, 2022Observed: 2.54 ft at 11:00AM May 15, 2022Observed: 2.53 ft at 11:15AM May 15, 2022Observed: 2.52 ft at 11:30AM May 15, 2022Observed: 2.51 ft at 11:45AM May 15, 2022Observed: 2.51 ft at 12:00PM May 15, 2022Observed: 2.51 ft at 12:15PM May 15, 2022Observed: 2.5 ft at 12:30PM May 15, 2022Observed: 2.49 ft at 12:45PM May 15, 2022Observed: 2.49 ft at 1:00PM May 15, 2022Observed: 2.48 ft at 1:15PM May 15, 2022Observed: 2.47 ft at 1:30PM May 15, 2022Observed: 2.47 ft at 1:45PM May 15, 2022Observed: 2.47 ft at 2:00PM May 15, 2022Observed: 2.46 ft at 2:15PM May 15, 2022Observed: 2.45 ft at 2:30PM May 15, 2022Observed: 2.45 ft at 2:45PM May 15, 2022Observed: 2.44 ft at 3:00PM May 15, 2022Observed: 2.43 ft at 3:15PM May 15, 2022Observed: 2.43 ft at 3:30PM May 15, 2022Observed: 2.43 ft at 3:45PM May 15, 2022Observed: 2.43 ft at 4:00PM May 15, 2022Observed: 2.42 ft at 4:15PM May 15, 2022Observed: 2.41 ft at 4:30PM May 15, 2022Observed: 2.41 ft at 4:45PM May 15, 2022Observed: 2.4 ft at 5:00PM May 15, 2022Observed: 2.4 ft at 5:15PM May 15, 2022Observed: 2.39 ft at 5:30PM May 15, 2022Observed: 2.39 ft at 5:45PM May 15, 2022Observed: 2.39 ft at 6:00PM May 15, 2022Observed: 2.38 ft at 6:15PM May 15, 2022Observed: 2.38 ft at 6:30PM May 15, 2022Observed: 2.37 ft at 6:45PM May 15, 2022Observed: 2.37 ft at 7:00PM May 15, 2022Observed: 2.37 ft at 7:15PM May 15, 2022Observed: 2.36 ft at 7:30PM May 15, 2022Observed: 2.35 ft at 7:45PM May 15, 2022Observed: 2.35 ft at 8:00PM May 15, 2022Observed: 2.35 ft at 8:15PM May 15, 2022Observed: 2.34 ft at 8:30PM May 15, 2022Observed: 2.34 ft at 8:45PM May 15, 2022Observed: 2.34 ft at 9:00PM May 15, 2022Observed: 2.33 ft at 9:15PM May 15, 2022Observed: 2.33 ft at 9:30PM May 15, 2022Observed: 2.33 ft at 9:45PM May 15, 2022Observed: 2.32 ft at 10:00PM May 15, 2022Observed: 2.31 ft at 10:15PM May 15, 2022Observed: 2.31 ft at 10:30PM May 15, 2022Observed: 2.31 ft at 10:45PM May 15, 2022Observed: 2.31 ft at 11:00PM May 15, 2022Observed: 2.3 ft at 11:15PM May 15, 2022Observed: 2.3 ft at 11:30PM May 15, 2022Observed: 2.3 ft at 11:45PM May 15, 2022Observed: 2.29 ft at 12:00AM May 16, 2022Observed: 2.29 ft at 12:15AM May 16, 2022Observed: 2.29 ft at 12:30AM May 16, 2022Observed: 2.29 ft at 12:45AM May 16, 2022Observed: 2.28 ft at 1:00AM May 16, 2022Observed: 2.28 ft at 1:15AM May 16, 2022Observed: 2.27 ft at 1:30AM May 16, 2022Observed: 2.27 ft at 1:45AM May 16, 2022Observed: 2.27 ft at 2:00AM May 16, 2022Observed: 2.27 ft at 2:15AM May 16, 2022Observed: 2.26 ft at 2:30AM May 16, 2022Observed: 2.26 ft at 2:45AM May 16, 2022Observed: 2.26 ft at 3:00AM May 16, 2022Observed: 2.26 ft at 3:15AM May 16, 2022Observed: 2.25 ft at 3:30AM May 16, 2022Observed: 2.25 ft at 3:45AM May 16, 2022Observed: 2.25 ft at 4:00AM May 16, 2022Observed: 2.25 ft at 4:15AM May 16, 2022Observed: 2.24 ft at 4:30AM May 16, 2022Observed: 2.24 ft at 4:45AM May 16, 2022Observed: 2.24 ft at 5:00AM May 16, 2022Observed: 2.23 ft at 5:15AM May 16, 2022Observed: 2.23 ft at 5:30AM May 16, 2022Observed: 2.23 ft at 5:45AM May 16, 2022Observed: 2.23 ft at 6:00AM May 16, 2022Observed: 2.23 ft at 6:15AM May 16, 2022Observed: 2.23 ft at 6:30AM May 16, 2022Observed: 2.22 ft at 6:45AM May 16, 2022Observed: 2.22 ft at 7:00AM May 16, 2022Observed: 2.22 ft at 7:15AM May 16, 2022Observed: 2.22 ft at 7:30AM May 16, 2022Observed: 2.21 ft at 7:45AM May 16, 2022Observed: 2.21 ft at 8:00AM May 16, 2022Observed: 2.21 ft at 8:15AM May 16, 2022Observed: 2.21 ft at 8:30AM May 16, 2022USGS--Water Resources of the United StatesPCTN4(plotting HGIRG) Graph Created (8:05PM May 16, 2022)ObservedLatest observed value: 2.21 ft at 8:30 AM EDT 16-May-2022. Flood Stage is 9 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the Stony Brook at Princeton. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 14
Moderate Flood Stage: 11
Flood Stage: 9
Action Stage: 8
Low Stage (in feet): 0

Historic Crests
(1) 16.23 ft on 08/28/2011
(2) 14.26 ft on 08/28/1971
(3) 14.02 ft on 09/16/1999
(4) 12.48 ft on 08/22/2021
(5) 12.27 ft on 01/19/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.48 ft on 08/22/2021
(2) 10.36 ft on 11/25/2018
(3) 11.83 ft on 05/27/2018
(4) 12.18 ft on 05/01/2014
(5) 16.23 ft on 08/28/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
16 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 The Hun School athletic fields flood. Flooding along the brook can worsen if the Delaware and Raritan Canal is also running high.
11 Mercer Street, between Province Line Road and the Stony Brook Bridge, is subject to closure due to flooding.
9 Quaker Road floods and it subject to closure. Mercer Street begins to flood.
8 Adjacent floodplain begins to flood including the Stony Brook walking trail.
About This Location Collapse

Latitude: 40.333056° N, Longitude: 74.681944° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 9 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 62.23 71.23 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Additional Information Collapse
During winter months, cold and ice may result in inaccurate real-time stream stage and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Philadelphia/Mount Holly Weather Forecast Office
732 Woodlane Road
Mount Holly, NJ 08060-9615
(609) 261-6600
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