National Weather Service Advanced Hydrologic Prediction Service

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This probabilistic forecast is issued by the Middle Atlantic River Forecast Center.

	Hydrograph			River at a Glance			Download			Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

About this graph

Forecasts for the Perkiomen Creek at Graterford are issued routinely year-round.

Return to Area Map

Zoom Level:16

Flood Categories (in feet)

Major Flood Stage:	16
Moderate Flood Stage:	13
Flood Stage:	11
Action Stage:	8
Low Stage (in feet):	-9999

Historic Crests
(1) 24.23 ft on 09/02/2021
(2) 19.32 ft on 08/05/2020
(3) 18.26 ft on 07/09/1935
(4) 18.20 ft on 08/28/2011
(5) 17.08 ft on 06/22/1972
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 24.23 ft on 09/02/2021
(2) 12.93 ft on 12/25/2020
(3) 12.46 ft on 12/01/2020
(4) 19.32 ft on 08/05/2020
(5) 16.03 ft on 07/12/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

	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

If you notice any errors in the below information, please contact our Webmaster
19	The Schwenksville Sewer and Water Plant floods as does Route 73/Haldeman Road.
18	Smaller tributaries are affected by high water from the Perkiomen. Flooding is possible near the Route 113 Bridge in Perkiomen Township.
16	Collegeville businesses on Route 29, between East Ninth Avenue and East Main Street, begin to take on water.
15	East Main Street in Collegeville floods.
14	Storm sewers back up in Collegeville and flood Route 29.
13	First Avenue in Collegeville becomes impassable.
12	Portions of Central Perkiomen Park in Collegeville are flooded. Flood waters expand onto and to the west of First Avenue in Collegeville.
11	Graterford Road and Penitentiary Bridge are closed due to flooding.
8	Park Avenue in Schwenksville is flooded. The Perkiomen Trail is flooded in Perkiomen Township at Plank Road and Route 113.

Other Real-time and/or Archive Data Sources:

U.S. Geological Survey (USGS) Data and Site Info for Graterford

Additional Information

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)

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

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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