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Hydrograph River at a Glance Download
Perkiomen Creek at Graterford Stage (ft)Flow (kcfs)Observed: 1.45 ft at 12:30PM Mar 21, 2023Observed: 1.45 ft at 12:45PM Mar 21, 2023Observed: 1.45 ft at 12:47PM Mar 21, 2023Observed: 1.45 ft at 1:00PM Mar 21, 2023Observed: 1.45 ft at 1:15PM Mar 21, 2023Observed: 1.45 ft at 1:30PM Mar 21, 2023Observed: 1.45 ft at 1:45PM Mar 21, 2023Observed: 1.45 ft at 2:00PM Mar 21, 2023Observed: 1.45 ft at 2:15PM Mar 21, 2023Observed: 1.44 ft at 2:30PM Mar 21, 2023Observed: 1.45 ft at 2:45PM Mar 21, 2023Observed: 1.45 ft at 3:00PM Mar 21, 2023Observed: 1.44 ft at 3:15PM Mar 21, 2023Observed: 1.44 ft at 3:30PM Mar 21, 2023Observed: 1.44 ft at 3:45PM Mar 21, 2023Observed: 1.45 ft at 4:00PM Mar 21, 2023Observed: 1.44 ft at 4:15PM Mar 21, 2023Observed: 1.44 ft at 4:30PM Mar 21, 2023Observed: 1.44 ft at 4:45PM Mar 21, 2023Observed: 1.44 ft at 5:00PM Mar 21, 2023Observed: 1.44 ft at 5:15PM Mar 21, 2023Observed: 1.44 ft at 5:30PM Mar 21, 2023Observed: 1.44 ft at 5:45PM Mar 21, 2023Observed: 1.45 ft at 6:00PM Mar 21, 2023Observed: 1.45 ft at 6:15PM Mar 21, 2023Observed: 1.45 ft at 6:30PM Mar 21, 2023Observed: 1.45 ft at 6:45PM Mar 21, 2023Observed: 1.45 ft at 7:00PM Mar 21, 2023Observed: 1.45 ft at 7:15PM Mar 21, 2023Observed: 1.45 ft at 7:30PM Mar 21, 2023Observed: 1.45 ft at 7:45PM Mar 21, 2023Observed: 1.45 ft at 8:00PM Mar 21, 2023Observed: 1.45 ft at 8:15PM Mar 21, 2023Observed: 1.45 ft at 8:30PM Mar 21, 2023Observed: 1.44 ft at 8:45PM Mar 21, 2023Observed: 1.45 ft at 9:00PM Mar 21, 2023Observed: 1.44 ft at 9:15PM Mar 21, 2023Observed: 1.44 ft at 9:30PM Mar 21, 2023Observed: 1.44 ft at 9:45PM Mar 21, 2023Observed: 1.44 ft at 10:00PM Mar 21, 2023Observed: 1.44 ft at 10:15PM Mar 21, 2023Observed: 1.44 ft at 10:30PM Mar 21, 2023Observed: 1.44 ft at 10:45PM Mar 21, 2023Observed: 1.44 ft at 11:00PM Mar 21, 2023Observed: 1.44 ft at 11:15PM Mar 21, 2023Observed: 1.44 ft at 11:30PM Mar 21, 2023Observed: 1.44 ft at 11:45PM Mar 21, 2023Observed: 1.44 ft at 12:00AM Mar 22, 2023Observed: 1.44 ft at 12:15AM Mar 22, 2023Observed: 1.43 ft at 12:30AM Mar 22, 2023Observed: 1.43 ft at 12:45AM Mar 22, 2023Observed: 1.43 ft at 1:00AM Mar 22, 2023Observed: 1.43 ft at 1:02AM Mar 22, 2023Observed: 1.43 ft at 1:15AM Mar 22, 2023Observed: 1.43 ft at 1:30AM Mar 22, 2023Observed: 1.43 ft at 1:45AM Mar 22, 2023Observed: 1.43 ft at 2:00AM Mar 22, 2023Observed: 1.43 ft at 2:15AM Mar 22, 2023Observed: 1.44 ft at 2:30AM Mar 22, 2023Observed: 1.43 ft at 2:45AM Mar 22, 2023Observed: 1.43 ft at 3:00AM Mar 22, 2023Observed: 1.43 ft at 3:15AM Mar 22, 2023Observed: 1.43 ft at 3:30AM Mar 22, 2023Observed: 1.43 ft at 3:45AM Mar 22, 2023Observed: 1.43 ft at 4:00AM Mar 22, 2023Observed: 1.43 ft at 4:15AM Mar 22, 2023Observed: 1.43 ft at 4:30AM Mar 22, 2023Observed: 1.43 ft at 4:45AM Mar 22, 2023Observed: 1.43 ft at 5:00AM Mar 22, 2023Observed: 1.43 ft at 5:15AM Mar 22, 2023Observed: 1.43 ft at 5:30AM Mar 22, 2023Observed: 1.43 ft at 5:45AM Mar 22, 2023Observed: 1.43 ft at 6:00AM Mar 22, 2023Observed: 1.43 ft at 6:15AM Mar 22, 2023Observed: 1.43 ft at 6:30AM Mar 22, 2023Observed: 1.42 ft at 6:45AM Mar 22, 2023Observed: 1.42 ft at 7:00AM Mar 22, 2023Observed: 1.42 ft at 7:15AM Mar 22, 2023Observed: 1.42 ft at 7:30AM Mar 22, 2023Observed: 1.42 ft at 7:45AM Mar 22, 2023Observed: 1.42 ft at 8:00AM Mar 22, 2023Observed: 1.42 ft at 8:15AM Mar 22, 2023Observed: 1.42 ft at 8:30AM Mar 22, 2023Observed: 1.42 ft at 8:45AM Mar 22, 2023Observed: 1.42 ft at 9:00AM Mar 22, 2023Observed: 1.42 ft at 9:15AM Mar 22, 2023Observed: 1.42 ft at 9:30AM Mar 22, 2023Observed: 1.42 ft at 9:45AM Mar 22, 2023Observed: 1.42 ft at 10:00AM Mar 22, 2023Observed: 1.41 ft at 10:15AM Mar 22, 2023Observed: 1.41 ft at 10:30AM Mar 22, 2023Observed: 1.42 ft at 10:45AM Mar 22, 2023Observed: 1.42 ft at 11:00AM Mar 22, 2023Observed: 1.42 ft at 11:15AM Mar 22, 2023Observed: 1.42 ft at 11:30AM Mar 22, 2023Observed: 1.41 ft at 11:45AM Mar 22, 2023Observed: 1.41 ft at 12:00PM Mar 22, 2023Observed: 1.41 ft at 12:15PM Mar 22, 2023Observed: 1.41 ft at 12:30PM Mar 22, 2023Observed: 1.42 ft at 12:45PM Mar 22, 2023Observed: 1.41 ft at 1:00PM Mar 22, 2023Observed: 1.41 ft at 1:02PM Mar 22, 2023Observed: 1.42 ft at 1:15PM Mar 22, 2023Observed: 1.42 ft at 1:30PM Mar 22, 2023Observed: 1.42 ft at 1:45PM Mar 22, 2023Observed: 1.41 ft at 2:00PM Mar 22, 2023Observed: 1.42 ft at 2:15PM Mar 22, 2023Observed: 1.42 ft at 2:30PM Mar 22, 2023Observed: 1.42 ft at 2:45PM Mar 22, 2023Observed: 1.42 ft at 3:00PM Mar 22, 2023Observed: 1.42 ft at 3:15PM Mar 22, 2023Observed: 1.42 ft at 3:30PM Mar 22, 2023Observed: 1.42 ft at 3:45PM Mar 22, 2023Observed: 1.42 ft at 4:00PM Mar 22, 2023Observed: 1.41 ft at 4:15PM Mar 22, 2023Observed: 1.42 ft at 4:30PM Mar 22, 2023Observed: 1.42 ft at 4:45PM Mar 22, 2023Observed: 1.42 ft at 5:00PM Mar 22, 2023Observed: 1.41 ft at 5:15PM Mar 22, 2023Observed: 1.42 ft at 5:30PM Mar 22, 2023Observed: 1.42 ft at 5:45PM Mar 22, 2023Observed: 1.42 ft at 6:00PM Mar 22, 2023Observed: 1.42 ft at 6:15PM Mar 22, 2023Observed: 1.42 ft at 6:30PM Mar 22, 2023Observed: 1.41 ft at 6:45PM Mar 22, 2023Observed: 1.41 ft at 7:00PM Mar 22, 2023Observed: 1.41 ft at 7:15PM Mar 22, 2023Observed: 1.41 ft at 7:30PM Mar 22, 2023Observed: 1.41 ft at 7:45PM Mar 22, 2023Observed: 1.41 ft at 8:00PM Mar 22, 2023Observed: 1.41 ft at 8:15PM Mar 22, 2023Observed: 1.41 ft at 8:30PM Mar 22, 2023Observed: 1.4 ft at 8:45PM Mar 22, 2023Observed: 1.4 ft at 9:00PM Mar 22, 2023Observed: 1.4 ft at 9:15PM Mar 22, 2023Observed: 1.4 ft at 9:30PM Mar 22, 2023Observed: 1.4 ft at 9:45PM Mar 22, 2023Observed: 1.4 ft at 10:00PM Mar 22, 2023Observed: 1.4 ft at 10:15PM Mar 22, 2023Observed: 1.4 ft at 10:30PM Mar 22, 2023Observed: 1.4 ft at 10:45PM Mar 22, 2023Observed: 1.4 ft at 11:00PM Mar 22, 2023Observed: 1.4 ft at 11:15PM Mar 22, 2023Observed: 1.4 ft at 11:30PM Mar 22, 2023Observed: 1.4 ft at 11:45PM Mar 22, 2023Observed: 1.4 ft at 12:00AM Mar 23, 2023Observed: 1.4 ft at 12:15AM Mar 23, 2023Observed: 1.4 ft at 12:30AM Mar 23, 2023Observed: 1.4 ft at 12:45AM Mar 23, 2023Observed: 1.4 ft at 1:00AM Mar 23, 2023Observed: 1.4 ft at 1:02AM Mar 23, 2023Observed: 1.4 ft at 1:15AM Mar 23, 2023Observed: 1.4 ft at 1:30AM Mar 23, 2023Observed: 1.4 ft at 1:45AM Mar 23, 2023Observed: 1.4 ft at 2:00AM Mar 23, 2023Observed: 1.4 ft at 2:15AM Mar 23, 2023Observed: 1.4 ft at 2:30AM Mar 23, 2023Observed: 1.4 ft at 2:45AM Mar 23, 2023Observed: 1.4 ft at 3:00AM Mar 23, 2023Observed: 1.4 ft at 3:15AM Mar 23, 2023Observed: 1.4 ft at 3:30AM Mar 23, 2023Observed: 1.4 ft at 3:45AM Mar 23, 2023Observed: 1.4 ft at 4:00AM Mar 23, 2023Observed: 1.4 ft at 4:15AM Mar 23, 2023Observed: 1.4 ft at 4:30AM Mar 23, 2023Observed: 1.4 ft at 4:45AM Mar 23, 2023Observed: 1.4 ft at 5:00AM Mar 23, 2023Observed: 1.41 ft at 5:15AM Mar 23, 2023Observed: 1.41 ft at 5:30AM Mar 23, 2023Observed: 1.41 ft at 5:45AM Mar 23, 2023Observed: 1.41 ft at 6:00AM Mar 23, 2023Observed: 1.41 ft at 6:15AM Mar 23, 2023Observed: 1.42 ft at 6:30AM Mar 23, 2023Observed: 1.42 ft at 6:45AM Mar 23, 2023Observed: 1.42 ft at 7:00AM Mar 23, 2023Observed: 1.43 ft at 7:15AM Mar 23, 2023Observed: 1.43 ft at 7:30AM Mar 23, 2023Observed: 1.43 ft at 7:45AM Mar 23, 2023Observed: 1.44 ft at 8:00AM Mar 23, 2023Observed: 1.44 ft at 8:15AM Mar 23, 2023Observed: 1.44 ft at 8:30AM Mar 23, 2023Observed: 1.44 ft at 8:45AM Mar 23, 2023Observed: 1.44 ft at 9:00AM Mar 23, 2023Observed: 1.45 ft at 9:15AM Mar 23, 2023Observed: 1.45 ft at 9:30AM Mar 23, 2023Observed: 1.46 ft at 9:45AM Mar 23, 2023Observed: 1.46 ft at 10:00AM Mar 23, 2023Observed: 1.47 ft at 10:15AM Mar 23, 2023Observed: 1.47 ft at 10:30AM Mar 23, 2023Observed: 1.47 ft at 10:45AM Mar 23, 2023Observed: 1.48 ft at 11:00AM Mar 23, 2023Observed: 1.49 ft at 11:15AM Mar 23, 2023Observed: 1.49 ft at 11:30AM Mar 23, 2023Observed: 1.49 ft at 11:45AM Mar 23, 2023Observed: 1.5 ft at 12:00PM Mar 23, 2023Observed: 1.51 ft at 12:15PM Mar 23, 2023Observed: 1.52 ft at 12:30PM Mar 23, 2023Observed: 1.53 ft at 12:45PM Mar 23, 2023Observed: 1.54 ft at 1:00PM Mar 23, 2023Observed: 1.54 ft at 1:01PM Mar 23, 2023Observed: 1.55 ft at 1:15PM Mar 23, 2023Observed: 1.56 ft at 1:30PM Mar 23, 2023Observed: 1.57 ft at 1:45PM Mar 23, 2023Observed: 1.58 ft at 2:00PM Mar 23, 2023Observed: 1.6 ft at 2:15PM Mar 23, 2023Observed: 1.61 ft at 2:30PM Mar 23, 2023Observed: 1.62 ft at 2:45PM Mar 23, 2023Observed: 1.63 ft at 3:00PM Mar 23, 2023Observed: 1.64 ft at 3:15PM Mar 23, 2023Observed: 1.65 ft at 3:30PM Mar 23, 2023Observed: 1.65 ft at 3:45PM Mar 23, 2023Observed: 1.66 ft at 4:00PM Mar 23, 2023Observed: 1.67 ft at 4:15PM Mar 23, 2023Observed: 1.67 ft at 4:30PM Mar 23, 2023Observed: 1.67 ft at 4:45PM Mar 23, 2023Observed: 1.68 ft at 5:00PM Mar 23, 2023Observed: 1.68 ft at 5:15PM Mar 23, 2023Observed: 1.69 ft at 5:30PM Mar 23, 2023Observed: 1.7 ft at 5:45PM Mar 23, 2023Observed: 1.71 ft at 6:00PM Mar 23, 2023Observed: 1.72 ft at 6:15PM Mar 23, 2023Observed: 1.74 ft at 6:30PM Mar 23, 2023Observed: 1.75 ft at 6:45PM Mar 23, 2023Observed: 1.76 ft at 7:00PM Mar 23, 2023Observed: 1.77 ft at 7:15PM Mar 23, 2023Observed: 1.78 ft at 7:30PM Mar 23, 2023Observed: 1.79 ft at 7:45PM Mar 23, 2023Observed: 1.8 ft at 8:00PM Mar 23, 2023Observed: 1.81 ft at 8:15PM Mar 23, 2023Observed: 1.82 ft at 8:30PM Mar 23, 2023Observed: 1.82 ft at 8:45PM Mar 23, 2023Observed: 1.83 ft at 9:00PM Mar 23, 2023Observed: 1.84 ft at 9:15PM Mar 23, 2023Observed: 1.85 ft at 9:30PM Mar 23, 2023Observed: 1.86 ft at 9:45PM Mar 23, 2023Observed: 1.86 ft at 10:00PM Mar 23, 2023Observed: 1.87 ft at 10:15PM Mar 23, 2023Observed: 1.87 ft at 10:30PM Mar 23, 2023Observed: 1.87 ft at 10:45PM Mar 23, 2023Highest Observation: 1.88 ft at 11:00PM Mar 23, 2023Highest Observation: 1.88 ft at 11:15PM Mar 23, 2023Observed: 1.87 ft at 11:30PM Mar 23, 2023Highest Observation: 1.88 ft at 11:45PM Mar 23, 2023Highest Observation: 1.88 ft at 12:00AM Mar 24, 2023Observed: 1.87 ft at 12:15AM Mar 24, 2023Highest Observation: 1.88 ft at 12:30AM Mar 24, 2023Highest Observation: 1.88 ft at 12:45AM Mar 24, 2023Observed: 1.87 ft at 1:00AM Mar 24, 2023Observed: 1.87 ft at 1:01AM Mar 24, 2023Observed: 1.87 ft at 1:15AM Mar 24, 2023Observed: 1.87 ft at 1:30AM Mar 24, 2023Observed: 1.87 ft at 1:45AM Mar 24, 2023Observed: 1.87 ft at 2:00AM Mar 24, 2023Observed: 1.87 ft at 2:15AM Mar 24, 2023Observed: 1.87 ft at 2:30AM Mar 24, 2023Observed: 1.87 ft at 2:45AM Mar 24, 2023Observed: 1.87 ft at 3:00AM Mar 24, 2023Observed: 1.87 ft at 3:15AM Mar 24, 2023Observed: 1.87 ft at 3:30AM Mar 24, 2023Observed: 1.87 ft at 3:45AM Mar 24, 2023Observed: 1.87 ft at 4:00AM Mar 24, 2023Observed: 1.87 ft at 4:15AM Mar 24, 2023Observed: 1.86 ft at 4:30AM Mar 24, 2023Observed: 1.86 ft at 4:45AM Mar 24, 2023Observed: 1.87 ft at 5:00AM Mar 24, 2023Observed: 1.86 ft at 5:15AM Mar 24, 2023Observed: 1.86 ft at 5:30AM Mar 24, 2023Observed: 1.86 ft at 5:45AM Mar 24, 2023Observed: 1.86 ft at 6:00AM Mar 24, 2023Observed: 1.86 ft at 6:15AM Mar 24, 2023Observed: 1.86 ft at 6:30AM Mar 24, 2023Observed: 1.86 ft at 6:45AM Mar 24, 2023Observed: 1.85 ft at 7:00AM Mar 24, 2023Observed: 1.85 ft at 7:15AM Mar 24, 2023Observed: 1.85 ft at 7:30AM Mar 24, 2023Observed: 1.85 ft at 7:45AM Mar 24, 2023Observed: 1.85 ft at 8:00AM Mar 24, 2023Observed: 1.85 ft at 8:15AM Mar 24, 2023Observed: 1.85 ft at 8:30AM Mar 24, 2023Observed: 1.85 ft at 8:45AM Mar 24, 2023Observed: 1.84 ft at 9:00AM Mar 24, 2023Observed: 1.84 ft at 9:15AM Mar 24, 2023Observed: 1.84 ft at 9:30AM Mar 24, 2023Observed: 1.84 ft at 9:45AM Mar 24, 2023Observed: 1.84 ft at 10:00AM Mar 24, 2023Observed: 1.84 ft at 10:15AM Mar 24, 2023Observed: 1.84 ft at 10:30AM Mar 24, 2023Observed: 1.84 ft at 10:45AM Mar 24, 2023Observed: 1.84 ft at 11:00AM Mar 24, 2023Observed: 1.84 ft at 11:15AM Mar 24, 2023Forecast: 1.8 ft 2:00PM Mar 24, 2023Forecast: 1.9 ft 8:00PM Mar 24, 2023Forecast: 1.7 ft 2:00AM Mar 25, 2023Forecast: 1.7 ft 8:00AM Mar 25, 2023Forecast: 2.2 ft 2:00PM Mar 25, 2023Forecast: 2.8 ft 8:00PM Mar 25, 2023Highest Forecast: 3 ft 2:00AM Mar 26, 2023Forecast: 2.6 ft 8:00AM Mar 26, 2023Forecast: 2.2 ft 2:00PM Mar 26, 2023Forecast: 2.1 ft 8:00PM Mar 26, 2023Forecast: 2 ft 2:00AM Mar 27, 2023Forecast: 1.9 ft 8:00AM Mar 27, 2023USGS--Water Resources of the United StatesGRAP1(plotting HGIRG) Graph Created (12:18PM Mar 24, 2023)ObservedForecast (issued 9:48AM Mar 24)Latest observed value: 1.84 ft at 11:15 AM EDT 24-Mar-2023. Flood Stage is 11 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Perkiomen Creek at Graterford are issued routinely year-round.
Return to Area Map
Upstream Gauge - at East Greenville Upstream Gauge
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.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 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 Collapse
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 Street 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. Ninth Avenue begins to flood in Collegeville.
About This Location Collapse

Latitude: 40.229444° N, Longitude: 75.451944° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 112.66 ft 123.66 ft 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:
Additional Information Collapse
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)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

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.
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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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