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. During tropical cyclones, please refer
for additional storm surge information.
NOTE: 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.
Forecasts are not available for the Delaware Bay at Cape May. Only observed stages are available for this point.
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) 8.98 ft on 01/23/2016
(2) 8.89 ft on 10/29/2012
(3) 8.81 ft on 09/27/1985
(4) 8.68 ft on 10/29/2011
(5) 8.67 ft on 10/25/1980
Show More Historic Crests
: Preliminary values subject to further review.
(1) 7.70 ft on 03/04/2018
(2) 7.82 ft on 09/19/2017
(3) 7.81 ft on 05/25/2017
(4) 7.75 ft on 05/05/2016
(5) 8.12 ft on 02/09/2016
Show More Recent Crests
: Preliminary values subject to further review.
Low Water Records
(1) -3.02 ft on 01/27/1971
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
The level reached on January 23, 2016.
The level reached on October 29, 2012 during Post Tropical Cyclone Sandy.
The level reached on September 27, 1985 during Hurricane Gloria.
MAJOR FLOODING. At this level flooding starts to become severe enough to begin causing structural damage along with widespread flooding of roadways in the coastal communities of Cape May County and Cumberland County. Vulnerable homes and businesses may be severely damaged or destroyed 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.
MODERATE FLOODING. At this level, widespread flooding of roadways begins due to high water and/or wave action with many roads becoming impassable in the coastal communities of Cape May County and Cumberland County. 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.
Flooding begins along Bay Avenue on the north end of Ocean City, along the NJ Route 52 causeway and from 34th Street to 55th Street in Ocean City, in Strathmere, on Sea Isle Boulevard leading into Sea Isle City, on Central Avenue in Sea Isle City, on Avalon Boulevard near Garden State Parkway Exit 13, near the NJ Route 147 bridge into North Wildwood, near the Ocean Drive bridge between Wildwood Crest and Cape May, on Beach Avenue and New Jersey Avenue in Cape May, and between Cape May and West Cape May.
Flooding begins along Landis Avenue in Sea Isle City (around 29th Street), around the Townsends Inlet Bridge (Cape May County Route 619) between Sea Isle City and Avalon, along Ocean Drive and Dune Drive in Avalon, around 96th Street in Stone Harbor, along Park Boulevard in Wildwood Crest and around Yacht Avenue in Cape May.
Flooding begins on the access roads to the 9th Street bridge into Ocean City (NJ Route 52), in the Haven Avenue Basin area of Ocean City (24th Street through 34th Street), along Ocean Drive (Cape May County Route 619) between Ocean City and Strathmere, in North Wildwood and in West Wildwood. Flooding begins in Fortescue and Maurice River Township in Cumberland County.
COASTAL FLOOD ADVISORY LEVEL.
Flooding begins along the Delaware Bay shoreline from Reeds Beach to North Cape May. Flooding begins in Money Island and Gandys Beach in Cumberland County.
MINOR FLOODING. Flooding begins on the access roads to the NJ Route 47 bridge into Wildwood (including Rio Grande Avenue). Flooding begins along the road into Fortescue (Cumberland County Route 637) and in Bivalve.
Flooding begins at the boat ramp in North Wildwood (the bay end of 5th Avenue).
About This Location
Latitude: 38.966667° N, Longitude: 74.966667° 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
Automated Flood Warning Systems
Inundation Mapping Locations
NWS Precipitation and River Forecasting
AHPS Iframes for Developers
Mobile iNWS for emergency management
Flood Damage Costs/Fatalities in the US, 1903 - 2014
AHPS Web Brochure
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: 21-Dec-2016 5:21 PM