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Weather Forecast Office Philadelphia/Mount Holly, NJ

Middle Atlantic River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (EDT) Datum: NAVD88 Metadata

NOTE: Forecasts are not available for the Assunpink Creek near Mercerville. Only observed stages are available for this point.

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Flood Categories (in feet) Major Flood Stage: 13 Moderate Flood Stage: 11 Flood Stage: 9.5 Action Stage: 8.5 Low Stage (in feet): -9999 Historic Crests (1) 15.82 ft on 09/02/2021 (2) 14.29 ft on 05/01/2014 (3) 12.86 ft on 05/27/2018 (4) 12.31 ft on 11/25/2018 (5) 9.68 ft on 07/18/2021 (P): Preliminary values subject to further review. Recent Crests (1) 15.82 ft on 09/02/2021 (2) 9.68 ft on 07/18/2021 (3) 12.31 ft on 11/25/2018 (4) 12.86 ft on 05/27/2018 (5) 14.29 ft on 05/01/2014 (P): Preliminary values subject to further review. Low Water Records Currently none available.

Zoom Level:16 Legend FEMA Layer Gauge Location 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

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14	Flooding expands across the above mentioned areas. Roads are barricaded and closed.
13	Sweetbriar Avenue from Whitehead Road to Trinity Avenue is flooded and is subject to closures. Residential basements are flooded on Sweetbriar Avenue. The Whitehead Bridge connecting Hamilton and Lawrence is closed.
12	Assunpink Boulevard from 1st to 5th Avenue is flooded and is subject to closures. Rutgers Avenue from Sweetbriar Avenue to Trinity Avenue is flooded and is subject to closures.
11	Brown Avenue from Rutgers Avenue to Vetterlein Avenue is flooded and is subject to closures. Whitehead Road from 7th Avenue to Township Line is flooded and is subject to closures.
10	Assunpink Boulevard floods. Carnegie Road floods. Rutgers Avenue from Amhurst Avenue to the dead end floods and is subject to closures.
8.5	The Delaware and Raritan Canal State Park trail floods.

About This Location

Latitude: 40.247500° N, Longitude: 74.727778° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 9.5 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 98 107.5 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 Not Available Not Available 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: U.S. Geological Survey (USGS) Data and Site Info for Mercerville

Additional Information

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

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Information Ensemble River Forecasts Hourly Precipitation

Collaborative Agencies 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 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:30 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities