Search by city or zip code. Press enter or select the go button to submit request
Local weather forecast by
What is AHPS?
Weather Forecast Office Philadelphia/Mount Holly, NJ
Middle Atlantic River Forecast Center
River at a Glance
Auto Refresh: OFF
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
Datum: Not Available
Coastal Hazard Message
for specific information regarding Coastal Flood Watches, Warnings and Advisories. Flood impacts are based on long-term averages. Actual impacts from any tidal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow. During tropical cyclones, please refer
for additional storm surge information.
National Hurricane Center
reflects a reasonable worst case scenario. The experimental forecast above is the total water forecast that is expected to occur.
Forecasts for the Delaware River at Burlington (IN MLLW) are issued routinely year-round.
Vertical Datum references a tidal datum (MLLW)...for more information see
Tides and Currents
Scale to Flood Categories
Return to Area Map
Flood Categories (in feet)
Major Flood Stage:
Moderate Flood Stage:
Low Stage (in feet):
(1) 11.94 ft on 09/01/2021
(2) 11.94 ft on 04/17/2011
(3) 11.69 ft on 10/30/2012
(4) 11.61 ft on 12/21/2012
(5) 11.58 ft on 05/01/2014
Show More Historic Crests
: Preliminary values subject to further review.
(1) 11.30 ft on 10/29/2021
(2) 11.94 ft on 09/01/2021
(3) 10.65 ft on 08/04/2020
(4) 10.60 ft on 11/26/2018
(5) 10.62 ft on 09/10/2018
Show More Recent Crests
: Preliminary values subject to further review.
Low Water Records
(1) -3.51 ft on 02/15/2015
(2) -3.29 ft on 04/03/2016
(3) -3.16 ft on 01/07/2018
(4) -3.04 ft on 01/04/2010
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
If you notice any errors in the below information, please contact our
(Mean Lower Low Water (MLLW)) The level reached on April 17, 2011 and on September 1, 2021 during Post Tropical Cyclone Ida.
(MLLW) The level reached on October 30, 2012 during Post Tropical Cyclone Sandy.
(MLLW) The level reached on December 21, 2012.
(MLLW) The level reached on May 1, 2014.
(MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the river and its tidal tributaries in Burlington County, lower Bucks County and Northeast Philadelphia. Vulnerable homes and businesses may be damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone who attempts to cross on foot or in a vehicle.
(MLLW) MODERATE FLOODING. At this level, additional roadways near the river and its tidal tributaries in Burlington County, lower Bucks County and Northeast Philadelphia begin to flood. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.
(MLLW) Flooding begins around Radcliffe Street and Mill Street in Bristol PA. Flooding begins along Tanner's Run near the intersection of US Route 130, Beverly Road and Devlin Avenue in Burlington Township NJ. Flooding begins on the lower Rancocas Creek and its tributaries including Kendles Run and Parkers Creek near Creek Road in Moorestown NJ.
(MLLW) Flooding begins along the riverfront in Burlington City NJ. Flooding begins in Delanco NJ along Delaware Avenue and on the access road to the Riverside Bridge (Burlington Avenue). Flooding begins in Beverly, Riverside and Delran NJ. Flooding begins around Kern Street, Zeisner Avenue and River Road in Cinnaminson NJ. Flooding begins along the Pompeston Creek in Cinnaminson and Riverton NJ.
(MLLW) COASTAL FLOOD ADVISORY LEVEL.
(MLLW) Flooding begins near the mouth of the Neshaminy Creek in the Croydon section of Bristol Township including Sixth Avenue, River Road, Minot Avenue and Bank Street. Flooding begins around the large parking lot at the east end of Linden Avenue in Northeast Philadelphia.
(MLLW) MINOR FLOODING.
About This Location
Latitude: 40.081459° N, Longitude: 74.869447° W, Horizontal Datum: NAD83/WGS84
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
Older USGS topographic maps, NGVD29 benchmarks
Older USGS topographic maps, MSL benchmarks
NAVD88 to MHHW conversion from NOAA Vertical Datum Transformation (VDatum)
All gage data is referenced in MLLW. During winter months, cold and ice may result in inaccurate real-time stages. Adjustments or deletions of this data can only be done after detailed analysis.
River Forecast Centers
River Stage Summary
Inundation Mapping Locations
NWS Precipitation and River Forecasting
AHPS Iframes for Developers
Mobile iNWS for emergency management
Ensemble River Forecasts
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
National Weather Service
Philadelphia/Mount Holly Weather Forecast Office
732 Woodlane Road
Mount Holly, NJ 08060-9615
Page last modified: 2-Nov-2020 7:30 PM