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Hydrograph River at a Glance Download
Stony Brook at Watchung Stage (ft)Observed: 9.71 ft at 1:00PM Mar 29, 2023Observed: 9.71 ft at 1:15PM Mar 29, 2023Observed: 9.71 ft at 1:30PM Mar 29, 2023Observed: 9.71 ft at 1:45PM Mar 29, 2023Observed: 9.71 ft at 2:00PM Mar 29, 2023Observed: 9.71 ft at 2:15PM Mar 29, 2023Observed: 9.71 ft at 2:30PM Mar 29, 2023Observed: 9.71 ft at 2:45PM Mar 29, 2023Observed: 9.71 ft at 3:00PM Mar 29, 2023Observed: 9.71 ft at 3:15PM Mar 29, 2023Observed: 9.71 ft at 3:30PM Mar 29, 2023Observed: 9.7 ft at 4:45PM Mar 29, 2023Observed: 9.7 ft at 5:00PM Mar 29, 2023Observed: 9.7 ft at 5:15PM Mar 29, 2023Observed: 9.7 ft at 5:30PM Mar 29, 2023Observed: 9.7 ft at 5:45PM Mar 29, 2023Observed: 9.7 ft at 6:00PM Mar 29, 2023Observed: 9.7 ft at 6:15PM Mar 29, 2023Observed: 9.7 ft at 6:30PM Mar 29, 2023Observed: 9.7 ft at 6:45PM Mar 29, 2023Observed: 9.7 ft at 7:00PM Mar 29, 2023Observed: 9.7 ft at 7:15PM Mar 29, 2023Observed: 9.7 ft at 7:30PM Mar 29, 2023Observed: 9.7 ft at 7:45PM Mar 29, 2023Observed: 9.7 ft at 8:00PM Mar 29, 2023Observed: 9.69 ft at 8:15PM Mar 29, 2023Observed: 9.69 ft at 8:30PM Mar 29, 2023Observed: 9.69 ft at 8:45PM Mar 29, 2023Observed: 9.69 ft at 9:00PM Mar 29, 2023Observed: 9.69 ft at 9:15PM Mar 29, 2023Observed: 9.69 ft at 9:30PM Mar 29, 2023Observed: 9.69 ft at 9:45PM Mar 29, 2023Observed: 9.69 ft at 10:00PM Mar 29, 2023Observed: 9.69 ft at 10:15PM Mar 29, 2023Observed: 9.69 ft at 10:30PM Mar 29, 2023Observed: 9.69 ft at 10:45PM Mar 29, 2023Observed: 9.69 ft at 11:00PM Mar 29, 2023Observed: 9.69 ft at 11:15PM Mar 29, 2023Observed: 9.69 ft at 11:30PM Mar 29, 2023Observed: 9.69 ft at 11:45PM Mar 29, 2023Observed: 9.69 ft at 12:00AM Mar 30, 2023Observed: 9.69 ft at 12:15AM Mar 30, 2023Observed: 9.69 ft at 12:30AM Mar 30, 2023Observed: 9.7 ft at 12:45AM Mar 30, 2023Observed: 9.7 ft at 1:00AM Mar 30, 2023Observed: 9.7 ft at 1:15AM Mar 30, 2023Observed: 9.7 ft at 1:30AM Mar 30, 2023Observed: 9.69 ft at 1:45AM Mar 30, 2023Observed: 9.69 ft at 2:00AM Mar 30, 2023Observed: 9.69 ft at 2:15AM Mar 30, 2023Observed: 9.69 ft at 2:30AM Mar 30, 2023Observed: 9.69 ft at 2:45AM Mar 30, 2023Observed: 9.69 ft at 3:00AM Mar 30, 2023Observed: 9.69 ft at 3:15AM Mar 30, 2023Observed: 9.69 ft at 3:30AM Mar 30, 2023Observed: 9.69 ft at 3:45AM Mar 30, 2023Observed: 9.69 ft at 4:00AM Mar 30, 2023Observed: 9.69 ft at 4:15AM Mar 30, 2023Observed: 9.68 ft at 4:30AM Mar 30, 2023Observed: 9.68 ft at 4:45AM Mar 30, 2023Observed: 9.68 ft at 5:00AM Mar 30, 2023Observed: 9.68 ft at 5:15AM Mar 30, 2023Observed: 9.68 ft at 5:30AM Mar 30, 2023Observed: 9.68 ft at 5:45AM Mar 30, 2023Observed: 9.68 ft at 6:00AM Mar 30, 2023Observed: 9.68 ft at 6:15AM Mar 30, 2023Observed: 9.68 ft at 6:30AM Mar 30, 2023Observed: 9.68 ft at 6:45AM Mar 30, 2023Observed: 9.68 ft at 7:00AM Mar 30, 2023Observed: 9.68 ft at 7:15AM Mar 30, 2023Observed: 9.68 ft at 7:30AM Mar 30, 2023Observed: 9.68 ft at 7:45AM Mar 30, 2023Observed: 9.68 ft at 8:00AM Mar 30, 2023Observed: 9.68 ft at 8:15AM Mar 30, 2023Observed: 9.68 ft at 8:30AM Mar 30, 2023Observed: 9.68 ft at 8:45AM Mar 30, 2023Observed: 9.68 ft at 9:00AM Mar 30, 2023Observed: 9.68 ft at 9:15AM Mar 30, 2023Observed: 9.68 ft at 9:30AM Mar 30, 2023Observed: 9.69 ft at 9:45AM Mar 30, 2023Observed: 9.68 ft at 10:00AM Mar 30, 2023Observed: 9.68 ft at 10:15AM Mar 30, 2023Observed: 9.69 ft at 10:30AM Mar 30, 2023Observed: 9.68 ft at 10:45AM Mar 30, 2023Observed: 9.68 ft at 11:00AM Mar 30, 2023Observed: 9.68 ft at 11:15AM Mar 30, 2023Observed: 9.68 ft at 11:30AM Mar 30, 2023Observed: 9.68 ft at 11:45AM Mar 30, 2023Observed: 9.69 ft at 12:00PM Mar 30, 2023Observed: 9.69 ft at 12:15PM Mar 30, 2023Observed: 9.69 ft at 12:30PM Mar 30, 2023Observed: 9.69 ft at 12:45PM Mar 30, 2023Observed: 9.68 ft at 1:00PM Mar 30, 2023Observed: 9.68 ft at 1:15PM Mar 30, 2023Observed: 9.69 ft at 1:30PM Mar 30, 2023Observed: 9.69 ft at 1:45PM Mar 30, 2023Observed: 9.69 ft at 2:00PM Mar 30, 2023Observed: 9.69 ft at 2:15PM Mar 30, 2023Observed: 9.69 ft at 2:30PM Mar 30, 2023Observed: 9.68 ft at 2:45PM Mar 30, 2023Observed: 9.68 ft at 3:00PM Mar 30, 2023Observed: 9.68 ft at 3:15PM Mar 30, 2023Observed: 9.68 ft at 3:30PM Mar 30, 2023Observed: 9.68 ft at 3:45PM Mar 30, 2023Observed: 9.68 ft at 4:00PM Mar 30, 2023Observed: 9.68 ft at 4:15PM Mar 30, 2023Observed: 9.68 ft at 4:30PM Mar 30, 2023Observed: 9.68 ft at 4:45PM Mar 30, 2023Observed: 9.68 ft at 5:00PM Mar 30, 2023Observed: 9.68 ft at 5:15PM Mar 30, 2023Observed: 9.68 ft at 5:30PM Mar 30, 2023Observed: 9.68 ft at 5:45PM Mar 30, 2023Observed: 9.67 ft at 6:00PM Mar 30, 2023Observed: 9.68 ft at 6:15PM Mar 30, 2023Observed: 9.67 ft at 6:30PM Mar 30, 2023Observed: 9.67 ft at 6:45PM Mar 30, 2023Observed: 9.67 ft at 7:00PM Mar 30, 2023Observed: 9.67 ft at 7:15PM Mar 30, 2023Observed: 9.67 ft at 7:30PM Mar 30, 2023Observed: 9.67 ft at 7:45PM Mar 30, 2023Observed: 9.67 ft at 8:00PM Mar 30, 2023Observed: 9.67 ft at 8:15PM Mar 30, 2023Observed: 9.67 ft at 8:30PM Mar 30, 2023Observed: 9.67 ft at 8:45PM Mar 30, 2023Observed: 9.67 ft at 9:00PM Mar 30, 2023Observed: 9.67 ft at 9:15PM Mar 30, 2023Observed: 9.67 ft at 9:30PM Mar 30, 2023Observed: 9.66 ft at 9:45PM Mar 30, 2023Observed: 9.66 ft at 10:00PM Mar 30, 2023Observed: 9.66 ft at 10:15PM Mar 30, 2023Observed: 9.66 ft at 10:30PM Mar 30, 2023Observed: 9.66 ft at 10:45PM Mar 30, 2023Observed: 9.66 ft at 11:00PM Mar 30, 2023Observed: 9.66 ft at 11:15PM Mar 30, 2023Observed: 9.66 ft at 11:30PM Mar 30, 2023Observed: 9.66 ft at 11:45PM Mar 30, 2023Observed: 9.66 ft at 12:00AM Mar 31, 2023Observed: 9.66 ft at 12:15AM Mar 31, 2023Observed: 9.66 ft at 12:30AM Mar 31, 2023Observed: 9.66 ft at 12:45AM Mar 31, 2023Observed: 9.66 ft at 1:00AM Mar 31, 2023Observed: 9.66 ft at 1:15AM Mar 31, 2023Observed: 9.66 ft at 1:30AM Mar 31, 2023Observed: 9.66 ft at 1:45AM Mar 31, 2023Observed: 9.66 ft at 2:00AM Mar 31, 2023Observed: 9.66 ft at 2:15AM Mar 31, 2023Observed: 9.66 ft at 2:30AM Mar 31, 2023Observed: 9.66 ft at 2:45AM Mar 31, 2023Observed: 9.66 ft at 3:00AM Mar 31, 2023Observed: 9.66 ft at 3:15AM Mar 31, 2023Observed: 9.66 ft at 3:30AM Mar 31, 2023Observed: 9.66 ft at 3:45AM Mar 31, 2023Observed: 9.66 ft at 4:00AM Mar 31, 2023Observed: 9.66 ft at 4:15AM Mar 31, 2023Observed: 9.66 ft at 4:30AM Mar 31, 2023Observed: 9.66 ft at 4:45AM Mar 31, 2023Observed: 9.66 ft at 5:00AM Mar 31, 2023Observed: 9.66 ft at 5:15AM Mar 31, 2023Observed: 9.66 ft at 5:30AM Mar 31, 2023Observed: 9.66 ft at 5:45AM Mar 31, 2023Observed: 9.66 ft at 6:00AM Mar 31, 2023Observed: 9.66 ft at 6:15AM Mar 31, 2023Observed: 9.66 ft at 6:30AM Mar 31, 2023Observed: 9.66 ft at 6:45AM Mar 31, 2023Observed: 9.65 ft at 7:00AM Mar 31, 2023Observed: 9.65 ft at 7:15AM Mar 31, 2023Observed: 9.65 ft at 7:30AM Mar 31, 2023Observed: 9.66 ft at 7:45AM Mar 31, 2023Observed: 9.66 ft at 8:00AM Mar 31, 2023Observed: 9.66 ft at 8:15AM Mar 31, 2023Observed: 9.66 ft at 8:30AM Mar 31, 2023Observed: 9.66 ft at 8:45AM Mar 31, 2023Observed: 9.66 ft at 9:00AM Mar 31, 2023Observed: 9.66 ft at 9:15AM Mar 31, 2023Observed: 9.66 ft at 9:30AM Mar 31, 2023Observed: 9.66 ft at 9:45AM Mar 31, 2023Observed: 9.66 ft at 10:00AM Mar 31, 2023Observed: 9.66 ft at 10:15AM Mar 31, 2023Observed: 9.66 ft at 10:30AM Mar 31, 2023Observed: 9.66 ft at 10:45AM Mar 31, 2023Observed: 9.66 ft at 11:00AM Mar 31, 2023Observed: 9.67 ft at 11:15AM Mar 31, 2023Observed: 9.67 ft at 11:30AM Mar 31, 2023Observed: 9.67 ft at 11:45AM Mar 31, 2023Observed: 9.67 ft at 12:00PM Mar 31, 2023Observed: 9.67 ft at 12:15PM Mar 31, 2023Observed: 9.67 ft at 12:30PM Mar 31, 2023Observed: 9.67 ft at 12:45PM Mar 31, 2023Observed: 9.67 ft at 1:00PM Mar 31, 2023Observed: 9.67 ft at 1:15PM Mar 31, 2023Observed: 9.67 ft at 1:30PM Mar 31, 2023Observed: 9.67 ft at 1:45PM Mar 31, 2023Observed: 9.67 ft at 2:00PM Mar 31, 2023Observed: 9.66 ft at 2:15PM Mar 31, 2023Observed: 9.66 ft at 2:30PM Mar 31, 2023Observed: 9.66 ft at 2:45PM Mar 31, 2023Observed: 9.66 ft at 3:00PM Mar 31, 2023Observed: 9.66 ft at 3:15PM Mar 31, 2023Observed: 9.66 ft at 3:30PM Mar 31, 2023Observed: 9.65 ft at 3:45PM Mar 31, 2023Observed: 9.65 ft at 4:00PM Mar 31, 2023Observed: 9.65 ft at 4:15PM Mar 31, 2023Observed: 9.65 ft at 4:30PM Mar 31, 2023Observed: 9.65 ft at 4:45PM Mar 31, 2023Observed: 9.65 ft at 5:00PM Mar 31, 2023Observed: 9.65 ft at 5:15PM Mar 31, 2023Observed: 9.65 ft at 5:30PM Mar 31, 2023Observed: 9.65 ft at 5:45PM Mar 31, 2023Observed: 9.65 ft at 6:00PM Mar 31, 2023Observed: 9.65 ft at 6:15PM Mar 31, 2023Observed: 9.64 ft at 6:30PM Mar 31, 2023Observed: 9.64 ft at 6:45PM Mar 31, 2023Observed: 9.64 ft at 7:00PM Mar 31, 2023Observed: 9.64 ft at 7:15PM Mar 31, 2023Observed: 9.64 ft at 7:30PM Mar 31, 2023Observed: 9.64 ft at 7:45PM Mar 31, 2023Observed: 9.64 ft at 8:00PM Mar 31, 2023Observed: 9.65 ft at 8:15PM Mar 31, 2023Observed: 9.65 ft at 8:30PM Mar 31, 2023Observed: 9.65 ft at 8:45PM Mar 31, 2023Observed: 9.65 ft at 9:00PM Mar 31, 2023Observed: 9.65 ft at 9:15PM Mar 31, 2023Observed: 9.65 ft at 9:30PM Mar 31, 2023Observed: 9.65 ft at 9:45PM Mar 31, 2023Observed: 9.65 ft at 10:00PM Mar 31, 2023Observed: 9.65 ft at 10:15PM Mar 31, 2023Observed: 9.65 ft at 10:30PM Mar 31, 2023Observed: 9.65 ft at 10:45PM Mar 31, 2023Observed: 9.65 ft at 11:00PM Mar 31, 2023Observed: 9.65 ft at 11:15PM Mar 31, 2023Observed: 9.65 ft at 11:30PM Mar 31, 2023Observed: 9.65 ft at 11:45PM Mar 31, 2023Observed: 9.65 ft at 12:00AM Apr 01, 2023Observed: 9.65 ft at 12:15AM Apr 01, 2023Observed: 9.65 ft at 12:30AM Apr 01, 2023Observed: 9.66 ft at 12:45AM Apr 01, 2023Observed: 9.65 ft at 1:00AM Apr 01, 2023Observed: 9.65 ft at 1:15AM Apr 01, 2023Observed: 9.66 ft at 1:30AM Apr 01, 2023Observed: 9.66 ft at 1:45AM Apr 01, 2023Observed: 9.66 ft at 2:00AM Apr 01, 2023Observed: 9.66 ft at 2:15AM Apr 01, 2023Observed: 9.66 ft at 2:30AM Apr 01, 2023Observed: 9.66 ft at 2:45AM Apr 01, 2023Observed: 9.66 ft at 3:00AM Apr 01, 2023Observed: 9.66 ft at 3:15AM Apr 01, 2023Observed: 9.66 ft at 3:30AM Apr 01, 2023Observed: 9.66 ft at 3:45AM Apr 01, 2023Observed: 9.66 ft at 4:00AM Apr 01, 2023Observed: 9.66 ft at 4:15AM Apr 01, 2023Observed: 9.66 ft at 4:30AM Apr 01, 2023Observed: 9.66 ft at 4:45AM Apr 01, 2023Observed: 9.66 ft at 5:00AM Apr 01, 2023Observed: 9.66 ft at 5:15AM Apr 01, 2023Observed: 9.66 ft at 5:30AM Apr 01, 2023Observed: 9.66 ft at 5:45AM Apr 01, 2023Observed: 9.66 ft at 6:00AM Apr 01, 2023Observed: 9.66 ft at 6:15AM Apr 01, 2023Observed: 9.67 ft at 6:30AM Apr 01, 2023Observed: 9.67 ft at 6:45AM Apr 01, 2023Observed: 9.67 ft at 7:00AM Apr 01, 2023Observed: 9.67 ft at 7:15AM Apr 01, 2023Observed: 9.67 ft at 7:30AM Apr 01, 2023Observed: 9.68 ft at 7:45AM Apr 01, 2023Observed: 9.73 ft at 8:00AM Apr 01, 2023Observed: 9.77 ft at 8:15AM Apr 01, 2023Observed: 9.75 ft at 8:30AM Apr 01, 2023Observed: 9.72 ft at 8:45AM Apr 01, 2023Observed: 9.71 ft at 9:00AM Apr 01, 2023Observed: 9.72 ft at 9:15AM Apr 01, 2023Observed: 9.72 ft at 9:30AM Apr 01, 2023Observed: 9.72 ft at 9:45AM Apr 01, 2023Observed: 9.76 ft at 10:00AM Apr 01, 2023Observed: 9.78 ft at 10:15AM Apr 01, 2023Highest Observation: 9.79 ft at 10:30AM Apr 01, 2023Highest Observation: 9.79 ft at 10:45AM Apr 01, 2023Observed: 9.78 ft at 11:00AM Apr 01, 2023Observed: 9.78 ft at 11:15AM Apr 01, 2023Observed: 9.78 ft at 11:30AM Apr 01, 2023USGS--Water Resources of the United StatesWTCN4(plotting HGIRG) Graph Created (12:48PM Apr 1, 2023)ObservedLatest observed value: 9.78 ft at 11:30 AM EDT 1-Apr-2023. Flood Stage is 14 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 Watchung. Only observed stages are available for this point.
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Upstream Gauge - at Princeton Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 14
Action Stage: 14
Low Stage (in feet): 0

Historic Crests
(1) 24.50 ft on 08/02/1973
(2) 20.40 ft on 07/14/1975
(3) 17.16 ft on 09/16/1999
(4) 15.27 ft on 10/19/1996
(5) 15.24 ft on 04/27/2007
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.29 ft on 04/30/2014
(2) 15.24 ft on 04/27/2007
(3) 12.89 ft on 08/05/2003
(4) 17.16 ft on 09/16/1999
(5) 15.27 ft on 10/19/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
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.
About This Location Collapse

Latitude: 40.636667° N, Longitude: 74.451389° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 14 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 29 162.24 176.74 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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