Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.

Weather Forecast Office Philadelphia/Mount Holly, NJ

Middle Atlantic River Forecast Center

Coastal Flood Watch

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

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

NOTE: Forecasts for the Brandywine Creek at Wilmington are issued routinely year-round.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Flood Categories (in feet) Major Flood Stage: 19 Moderate Flood Stage: 18 Flood Stage: 16.5 Action Stage: 14.5 Low Stage (in feet): 0 Historic Crests (1) 23.14 ft on 09/02/2021 (2) 20.43 ft on 05/01/2014 (3) 18.71 ft on 08/28/2011 (4) 18.58 ft on 08/05/2020 (5) 17.34 ft on 03/11/2011 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 23.14 ft on 09/02/2021 (2) 18.58 ft on 08/05/2020 (3) 16.62 ft on 08/14/2018 (4) 16.90 ft on 02/25/2016 (5) 20.43 ft on 05/01/2014 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. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

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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23	Roughly a 20 block radius on both sides of the river floods. Flooding extends to Vandever Avenue on the north side and to 14th Street on the south side. Portions of Governor Printz Boulevard floods. The North Market Street Bridge is closed.
22	South Park Drive between Market Street and Van Buren Street and North Park Drive between Van Buren Street and the Swinging Bridge is closed due to flooding. The East 7th Street/7th Street Peninsula floods. Clifford Brown Walk, between East 14th Street and East 16th Street floods.
19.5	Widespread flooding occurs along the creek in Wilmington. Rockland Road from Black Gates Road to Country Club Drive is flooded as is Rockland Road from Adams Drive to Mt. Lebanon Road. The 1300 block of East 12th Street is flooded impacting access to I-495.
19	Serious flooding at the Dupont Experimental Station. Historic Breck's Mill area in Montchanin experiences significant flooding. Hagley Creek Road as well as Barley Mill Road are flooded. The Post Office is flooded as is the museum and library.
18	Ramsey Road is subject to closures between Del. 92 and Beaver Dam Road as the Brandywine backs up into Ransey Run.
17	Some flooding begins in the historic Breck's Mill area in Montchanin.
16.5	North Park Drive, west of North Market Street, in Brandywine State Park is subject to flooding and closures.
14.5	Minor flooding begins along the creek in the Brandywine State Park.

About This Location

Latitude: 39.769500° N, Longitude: 75.576694° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 16.5 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 67.17 83.67 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 Wilmington

Additional Information

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) 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. Due to a gage relocation, the flood stage level has recently changed(9/4/2008). The relocated gage is now on the left bank (upstream side) near the Rising Sun Bridge. The gage was previously 1/2 mile downstream below Mill Dam. Historical data associated with the new gage, such as crests and low water levels, will be listed as they occur. Here are the top four crests associated with the old location...15.49 ft on 06/23/1972...15.43 ft on 09/17/1999...13.89 ft on 08/19/1955...13.83 ft on 09/13/1971. Here are the top four low water records associated with the old location...2.31 ft on 09/13/1995...2.38 ft on 08/19/1963...2.49 ft on 10/31/1963...2.57 ft on 08/31/1965. 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