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Advanced Hydrologic Prediction Service
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This probabilistic forecast is issued by the Middle Atlantic River Forecast Center.
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About this graph
Forecasts for the Passaic River at Chatham are issued routinely year-round.
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Upstream Gauge - near Millington Upstream Gauge Downstream Gauge Downstream Gauge - at Pine Brook
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 10
Moderate Flood Stage: 8
Flood Stage: 6
Action Stage: 5.5
Low Stage (in feet): 0

Historic Crests
(1) 9.36 ft on 08/02/1973
(2) 8.41 ft on 09/02/2021
(3) 8.30 ft on 01/09/1905
(4) 8.16 ft on 08/28/1971
(5) 8.14 ft on 09/27/1975
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.41 ft on 09/02/2021
(2) 6.46 ft on 05/01/2014
(3) 6.25 ft on 09/09/2011
(4) 7.76 ft on 08/29/2011
(5) 6.38 ft on 04/17/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 3.25 ft on 10/11/1983
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Gauge LocationGauge Map Marker
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
11 Flooding begins between University Avenue and Route 24, north of Main Street.
10 Charwood and Brook Roads begin to flood. Passaic Street begins to flood near the intersection of Osborne Avenue. Edward Court begins to flood.
9 Business parking lots between Chatham Road and the Passaic River flood.
8 Businesses along John F. Kennedy Parkway, west of the Morris Turnpike, begin to flood.
6.5 The Central and Bridge Avenue bridges in Chatham Township are subject to closures. Edgewood Road is closed.
6 Portions of the Shepard Kolluck Park in Chatham floods. River Road by Henry Drive is subject to closures.
5.5 Open areas adjacent to the Passaic River flood in New Providence, Chatham Township, and Berkley Heights.

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) 10 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.

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.
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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Page last modified: 2-Nov-2020 7:30 PM
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