Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 
Hydrograph River at a Glance Download
East Branch Perkiomen Creek at Shwenksville Stage (ft)Flow (kcfs)Observed: 2.73 ft at 10:30AM Aug 03, 2020Observed: 2.72 ft at 10:45AM Aug 03, 2020Observed: 2.72 ft at 11:00AM Aug 03, 2020Observed: 2.72 ft at 11:15AM Aug 03, 2020Observed: 2.72 ft at 11:30AM Aug 03, 2020Observed: 2.71 ft at 11:45AM Aug 03, 2020Observed: 2.71 ft at 12:00PM Aug 03, 2020Observed: 2.71 ft at 12:15PM Aug 03, 2020Observed: 2.71 ft at 12:30PM Aug 03, 2020Observed: 2.71 ft at 12:45PM Aug 03, 2020Observed: 2.71 ft at 1:00PM Aug 03, 2020Observed: 2.71 ft at 1:15PM Aug 03, 2020Observed: 2.71 ft at 1:30PM Aug 03, 2020Observed: 2.71 ft at 1:45PM Aug 03, 2020Observed: 2.71 ft at 2:00PM Aug 03, 2020Observed: 2.71 ft at 2:15PM Aug 03, 2020Observed: 2.71 ft at 2:30PM Aug 03, 2020Observed: 2.71 ft at 2:45PM Aug 03, 2020Observed: 2.7 ft at 3:00PM Aug 03, 2020Observed: 2.71 ft at 3:15PM Aug 03, 2020Observed: 2.71 ft at 3:30PM Aug 03, 2020Observed: 2.71 ft at 3:45PM Aug 03, 2020Observed: 2.7 ft at 4:00PM Aug 03, 2020Observed: 2.7 ft at 4:15PM Aug 03, 2020Observed: 2.71 ft at 4:30PM Aug 03, 2020Observed: 2.71 ft at 4:45PM Aug 03, 2020Observed: 2.71 ft at 5:00PM Aug 03, 2020Observed: 2.72 ft at 5:15PM Aug 03, 2020Observed: 2.72 ft at 5:30PM Aug 03, 2020Observed: 2.72 ft at 5:45PM Aug 03, 2020Observed: 2.72 ft at 6:00PM Aug 03, 2020Observed: 2.72 ft at 6:15PM Aug 03, 2020Observed: 2.72 ft at 6:30PM Aug 03, 2020Observed: 2.72 ft at 6:45PM Aug 03, 2020Observed: 2.72 ft at 7:00PM Aug 03, 2020Observed: 2.72 ft at 7:15PM Aug 03, 2020Observed: 2.72 ft at 7:30PM Aug 03, 2020Observed: 2.72 ft at 7:45PM Aug 03, 2020Observed: 2.72 ft at 8:00PM Aug 03, 2020Observed: 2.72 ft at 8:15PM Aug 03, 2020Observed: 2.72 ft at 8:16PM Aug 03, 2020Observed: 2.72 ft at 8:30PM Aug 03, 2020Observed: 2.72 ft at 8:45PM Aug 03, 2020Observed: 2.72 ft at 9:00PM Aug 03, 2020Observed: 2.72 ft at 9:15PM Aug 03, 2020Observed: 2.73 ft at 10:30PM Aug 03, 2020Observed: 2.73 ft at 10:45PM Aug 03, 2020Observed: 2.73 ft at 11:00PM Aug 03, 2020Observed: 2.73 ft at 11:15PM Aug 03, 2020Observed: 2.73 ft at 11:30PM Aug 03, 2020Observed: 2.73 ft at 11:45PM Aug 03, 2020Observed: 2.73 ft at 12:00AM Aug 04, 2020Observed: 2.73 ft at 12:15AM Aug 04, 2020Observed: 2.73 ft at 12:30AM Aug 04, 2020Observed: 2.73 ft at 12:45AM Aug 04, 2020Observed: 2.73 ft at 1:00AM Aug 04, 2020Observed: 2.73 ft at 1:15AM Aug 04, 2020Observed: 2.73 ft at 1:30AM Aug 04, 2020Observed: 2.73 ft at 1:45AM Aug 04, 2020Observed: 2.73 ft at 2:00AM Aug 04, 2020Observed: 2.73 ft at 2:15AM Aug 04, 2020Observed: 2.73 ft at 2:30AM Aug 04, 2020Observed: 2.72 ft at 2:45AM Aug 04, 2020Observed: 2.73 ft at 3:00AM Aug 04, 2020Observed: 2.72 ft at 3:15AM Aug 04, 2020Observed: 2.73 ft at 3:30AM Aug 04, 2020Observed: 2.73 ft at 3:45AM Aug 04, 2020Observed: 2.73 ft at 4:00AM Aug 04, 2020Observed: 2.73 ft at 4:15AM Aug 04, 2020Observed: 2.74 ft at 4:30AM Aug 04, 2020Observed: 2.74 ft at 4:45AM Aug 04, 2020Observed: 2.74 ft at 5:00AM Aug 04, 2020Observed: 2.74 ft at 5:15AM Aug 04, 2020Observed: 2.74 ft at 5:30AM Aug 04, 2020Observed: 2.74 ft at 5:45AM Aug 04, 2020Observed: 2.75 ft at 6:00AM Aug 04, 2020Observed: 2.75 ft at 6:15AM Aug 04, 2020Observed: 2.75 ft at 6:30AM Aug 04, 2020Observed: 2.76 ft at 6:45AM Aug 04, 2020Observed: 2.77 ft at 7:00AM Aug 04, 2020Observed: 2.78 ft at 7:15AM Aug 04, 2020Observed: 2.82 ft at 7:30AM Aug 04, 2020Observed: 2.96 ft at 7:45AM Aug 04, 2020Observed: 3.01 ft at 8:00AM Aug 04, 2020Observed: 3.18 ft at 8:15AM Aug 04, 2020Observed: 3.18 ft at 8:16AM Aug 04, 2020Observed: 3.65 ft at 8:30AM Aug 04, 2020Observed: 3.65 ft at 8:31AM Aug 04, 2020Observed: 4.08 ft at 8:45AM Aug 04, 2020Observed: 4.08 ft at 8:46AM Aug 04, 2020Observed: 4.34 ft at 9:00AM Aug 04, 2020Observed: 4.55 ft at 9:15AM Aug 04, 2020Observed: 4.86 ft at 9:30AM Aug 04, 2020Observed: 5.17 ft at 9:45AM Aug 04, 2020Observed: 5.38 ft at 10:00AM Aug 04, 2020Observed: 5.6 ft at 10:15AM Aug 04, 2020Observed: 5.91 ft at 10:30AM Aug 04, 2020Observed: 5.91 ft at 10:31AM Aug 04, 2020Observed: 5.91 ft at 10:32AM Aug 04, 2020Observed: 6.33 ft at 10:45AM Aug 04, 2020Observed: 6.88 ft at 11:00AM Aug 04, 2020Observed: 6.88 ft at 11:01AM Aug 04, 2020Observed: 7.55 ft at 11:15AM Aug 04, 2020Observed: 8.6 ft at 11:45AM Aug 04, 2020Observed: 9.76 ft at 12:30PM Aug 04, 2020Observed: 9.76 ft at 12:31PM Aug 04, 2020Observed: 10.21 ft at 12:45PM Aug 04, 2020Observed: 10.21 ft at 12:46PM Aug 04, 2020Observed: 10.85 ft at 1:00PM Aug 04, 2020Observed: 10.85 ft at 1:01PM Aug 04, 2020Observed: 11.39 ft at 1:15PM Aug 04, 2020Observed: 12.01 ft at 1:30PM Aug 04, 2020Observed: 12.01 ft at 1:31PM Aug 04, 2020Observed: 12.35 ft at 1:45PM Aug 04, 2020Observed: 12.35 ft at 1:46PM Aug 04, 2020Observed: 12.47 ft at 2:00PM Aug 04, 2020Observed: 12.5 ft at 2:15PM Aug 04, 2020Observed: 12.43 ft at 2:30PM Aug 04, 2020Observed: 12.34 ft at 2:45PM Aug 04, 2020Observed: 12.17 ft at 3:00PM Aug 04, 2020Observed: 11.97 ft at 3:15PM Aug 04, 2020Observed: 11.86 ft at 3:30PM Aug 04, 2020Observed: 11.77 ft at 3:45PM Aug 04, 2020Observed: 11.63 ft at 4:00PM Aug 04, 2020Observed: 11.58 ft at 4:15PM Aug 04, 2020Observed: 11.65 ft at 4:30PM Aug 04, 2020Observed: 11.61 ft at 4:45PM Aug 04, 2020Observed: 11.84 ft at 5:00PM Aug 04, 2020Observed: 12.06 ft at 5:15PM Aug 04, 2020Observed: 12.3 ft at 5:30PM Aug 04, 2020Observed: 12.53 ft at 5:45PM Aug 04, 2020Observed: 12.76 ft at 6:00PM Aug 04, 2020Observed: 12.96 ft at 6:15PM Aug 04, 2020Observed: 13.06 ft at 6:30PM Aug 04, 2020Observed: 13.2 ft at 6:45PM Aug 04, 2020Observed: 13.2 ft at 7:00PM Aug 04, 2020Observed: 13.19 ft at 7:15PM Aug 04, 2020Highest Observation: 13.24 ft at 7:30PM Aug 04, 2020Observed: 13.07 ft at 7:45PM Aug 04, 2020Observed: 12.95 ft at 8:00PM Aug 04, 2020Observed: 12.75 ft at 8:15PM Aug 04, 2020Observed: 12.5 ft at 8:30PM Aug 04, 2020Observed: 12.27 ft at 8:45PM Aug 04, 2020Observed: 11.84 ft at 9:00PM Aug 04, 2020Observed: 11.84 ft at 9:01PM Aug 04, 2020Observed: 11.55 ft at 9:15PM Aug 04, 2020Observed: 11.12 ft at 9:30PM Aug 04, 2020Observed: 10.78 ft at 9:45PM Aug 04, 2020Observed: 10.49 ft at 10:00PM Aug 04, 2020Observed: 10.49 ft at 10:01PM Aug 04, 2020Observed: 9.99 ft at 10:15PM Aug 04, 2020Observed: 9.6 ft at 10:30PM Aug 04, 2020Observed: 9.17 ft at 10:45PM Aug 04, 2020Observed: 9.17 ft at 10:46PM Aug 04, 2020Observed: 8.59 ft at 11:00PM Aug 04, 2020Observed: 8.59 ft at 11:01PM Aug 04, 2020Observed: 7.69 ft at 11:15PM Aug 04, 2020Observed: 6.72 ft at 11:30PM Aug 04, 2020Observed: 6.72 ft at 11:31PM Aug 04, 2020Observed: 6.02 ft at 11:45PM Aug 04, 2020Observed: 6.02 ft at 11:46PM Aug 04, 2020Observed: 5.57 ft at 12:00AM Aug 05, 2020Observed: 5.57 ft at 12:01AM Aug 05, 2020Observed: 5.35 ft at 12:15AM Aug 05, 2020Observed: 5.18 ft at 12:30AM Aug 05, 2020Observed: 5.04 ft at 12:45AM Aug 05, 2020Observed: 4.93 ft at 1:00AM Aug 05, 2020Observed: 4.85 ft at 1:15AM Aug 05, 2020Observed: 4.83 ft at 1:30AM Aug 05, 2020Observed: 4.75 ft at 1:45AM Aug 05, 2020Observed: 4.69 ft at 2:00AM Aug 05, 2020Observed: 4.64 ft at 2:15AM Aug 05, 2020Observed: 4.61 ft at 2:30AM Aug 05, 2020Observed: 4.58 ft at 2:45AM Aug 05, 2020Observed: 4.53 ft at 3:00AM Aug 05, 2020Observed: 4.47 ft at 3:15AM Aug 05, 2020Observed: 4.45 ft at 3:30AM Aug 05, 2020Observed: 4.41 ft at 3:45AM Aug 05, 2020Observed: 4.38 ft at 4:00AM Aug 05, 2020Observed: 4.35 ft at 4:15AM Aug 05, 2020Observed: 4.27 ft at 4:30AM Aug 05, 2020Observed: 4.24 ft at 4:45AM Aug 05, 2020Observed: 4.2 ft at 5:00AM Aug 05, 2020Observed: 4.2 ft at 5:15AM Aug 05, 2020Observed: 4.16 ft at 5:30AM Aug 05, 2020Observed: 4.15 ft at 5:45AM Aug 05, 2020Observed: 4.19 ft at 6:00AM Aug 05, 2020Observed: 4.11 ft at 6:15AM Aug 05, 2020Observed: 4.08 ft at 6:30AM Aug 05, 2020Observed: 4.03 ft at 6:45AM Aug 05, 2020Observed: 4.09 ft at 7:00AM Aug 05, 2020Observed: 4.05 ft at 7:15AM Aug 05, 2020Observed: 3.99 ft at 7:30AM Aug 05, 2020Observed: 3.96 ft at 7:45AM Aug 05, 2020Observed: 3.95 ft at 8:00AM Aug 05, 2020Observed: 3.93 ft at 8:15AM Aug 05, 2020Observed: 3.91 ft at 8:30AM Aug 05, 2020Observed: 3.89 ft at 8:45AM Aug 05, 2020Observed: 3.87 ft at 9:00AM Aug 05, 2020Observed: 3.87 ft at 9:15AM Aug 05, 2020Observed: 3.85 ft at 9:30AM Aug 05, 2020Observed: 3.83 ft at 9:45AM Aug 05, 2020Observed: 3.82 ft at 10:00AM Aug 05, 2020Observed: 3.81 ft at 10:15AM Aug 05, 2020Observed: 3.84 ft at 10:30AM Aug 05, 2020Observed: 3.8 ft at 10:45AM Aug 05, 2020Observed: 3.79 ft at 11:00AM Aug 05, 2020Observed: 3.79 ft at 11:15AM Aug 05, 2020Observed: 3.79 ft at 11:30AM Aug 05, 2020Observed: 3.8 ft at 11:45AM Aug 05, 2020Observed: 3.76 ft at 12:00PM Aug 05, 2020Observed: 3.79 ft at 12:15PM Aug 05, 2020Observed: 3.75 ft at 12:30PM Aug 05, 2020Observed: 3.74 ft at 12:45PM Aug 05, 2020Observed: 3.7 ft at 1:00PM Aug 05, 2020Observed: 3.74 ft at 1:15PM Aug 05, 2020Observed: 3.7 ft at 1:30PM Aug 05, 2020Observed: 3.68 ft at 1:45PM Aug 05, 2020Observed: 3.67 ft at 2:00PM Aug 05, 2020Observed: 3.68 ft at 2:15PM Aug 05, 2020Observed: 3.73 ft at 2:30PM Aug 05, 2020Observed: 3.64 ft at 2:45PM Aug 05, 2020Observed: 3.67 ft at 3:00PM Aug 05, 2020Observed: 3.62 ft at 3:15PM Aug 05, 2020Observed: 3.63 ft at 3:30PM Aug 05, 2020Observed: 3.59 ft at 3:45PM Aug 05, 2020Observed: 3.6 ft at 4:00PM Aug 05, 2020Observed: 3.63 ft at 4:15PM Aug 05, 2020Observed: 3.64 ft at 4:30PM Aug 05, 2020Observed: 3.57 ft at 4:45PM Aug 05, 2020Observed: 3.55 ft at 5:00PM Aug 05, 2020Observed: 3.54 ft at 5:15PM Aug 05, 2020Observed: 3.58 ft at 5:30PM Aug 05, 2020Observed: 3.53 ft at 5:45PM Aug 05, 2020Observed: 3.57 ft at 6:00PM Aug 05, 2020Observed: 3.53 ft at 6:15PM Aug 05, 2020Observed: 3.49 ft at 6:30PM Aug 05, 2020Observed: 3.49 ft at 6:45PM Aug 05, 2020Observed: 3.49 ft at 7:00PM Aug 05, 2020Observed: 3.5 ft at 7:15PM Aug 05, 2020Observed: 3.47 ft at 7:30PM Aug 05, 2020Observed: 3.46 ft at 7:45PM Aug 05, 2020Observed: 3.46 ft at 8:00PM Aug 05, 2020Observed: 3.51 ft at 8:15PM Aug 05, 2020Observed: 3.49 ft at 8:30PM Aug 05, 2020Observed: 3.49 ft at 8:45PM Aug 05, 2020Observed: 3.49 ft at 9:00PM Aug 05, 2020Observed: 3.45 ft at 9:15PM Aug 05, 2020Observed: 3.47 ft at 9:30PM Aug 05, 2020Observed: 3.47 ft at 9:45PM Aug 05, 2020Observed: 3.46 ft at 10:00PM Aug 05, 2020Observed: 3.46 ft at 10:15PM Aug 05, 2020Observed: 3.43 ft at 11:30PM Aug 05, 2020Observed: 3.43 ft at 11:45PM Aug 05, 2020Observed: 3.41 ft at 12:00AM Aug 06, 2020Observed: 3.41 ft at 12:01AM Aug 06, 2020Observed: 3.38 ft at 12:15AM Aug 06, 2020Observed: 3.37 ft at 12:30AM Aug 06, 2020Observed: 3.39 ft at 12:45AM Aug 06, 2020Observed: 3.39 ft at 1:00AM Aug 06, 2020Observed: 3.39 ft at 1:15AM Aug 06, 2020Observed: 3.34 ft at 1:30AM Aug 06, 2020Observed: 3.33 ft at 1:45AM Aug 06, 2020Observed: 3.33 ft at 2:00AM Aug 06, 2020Observed: 3.4 ft at 2:15AM Aug 06, 2020Observed: 3.44 ft at 2:30AM Aug 06, 2020Observed: 3.43 ft at 2:45AM Aug 06, 2020Observed: 3.44 ft at 3:00AM Aug 06, 2020Observed: 3.43 ft at 3:15AM Aug 06, 2020Observed: 3.42 ft at 3:30AM Aug 06, 2020Observed: 3.42 ft at 3:45AM Aug 06, 2020Observed: 3.28 ft at 4:00AM Aug 06, 2020Observed: 3.27 ft at 4:15AM Aug 06, 2020Observed: 3.32 ft at 4:30AM Aug 06, 2020Observed: 3.31 ft at 4:45AM Aug 06, 2020Observed: 3.3 ft at 5:00AM Aug 06, 2020Observed: 3.28 ft at 5:15AM Aug 06, 2020Observed: 3.27 ft at 5:30AM Aug 06, 2020Observed: 3.25 ft at 5:45AM Aug 06, 2020Observed: 3.27 ft at 6:00AM Aug 06, 2020Observed: 3.26 ft at 6:15AM Aug 06, 2020Observed: 3.26 ft at 6:30AM Aug 06, 2020Observed: 3.27 ft at 6:45AM Aug 06, 2020Observed: 3.29 ft at 7:00AM Aug 06, 2020Observed: 3.23 ft at 7:15AM Aug 06, 2020Observed: 3.25 ft at 7:30AM Aug 06, 2020Observed: 3.25 ft at 7:45AM Aug 06, 2020Observed: 3.26 ft at 8:00AM Aug 06, 2020Observed: 3.27 ft at 8:15AM Aug 06, 2020Observed: 3.23 ft at 8:30AM Aug 06, 2020Observed: 3.24 ft at 8:45AM Aug 06, 2020Observed: 3.22 ft at 9:00AM Aug 06, 2020Observed: 3.22 ft at 9:15AM Aug 06, 2020USGS--Water Resources of the United StatesSWVP1(plotting HGIRG) Graph Created (10:18AM Aug 6, 2020)ObservedLatest observed value: 3.22 ft at 9:15 AM EDT 6-Aug-2020. Flood Stage is 8 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the East Branch Perkiomen Creek at Shwenksville. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 12
Moderate Flood Stage: 10
Flood Stage: 8
Action Stage: 7
Low Stage (in feet): 0

Historic Crests
(1) 14.03 ft on 09/16/1999
(2) 13.21 ft on 10/19/1996
(3) 12.97 ft on 01/19/1996
(4) 12.91 ft on 08/28/2011
(5) 12.18 ft on 06/28/2006
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.37 ft on 09/28/2018
(2) 10.82 ft on 09/08/2011
(3) 12.91 ft on 08/28/2011
(4) 12.18 ft on 06/28/2006
(5) 10.42 ft on 04/03/2005 (P)
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
12 Groff's Mill Road in Lower Salford is impassable. Homes between the river and the road take on water.
10 Groff's mill Road begins to flood and is subject to closures.
8 Bergey's Mill Park in Lower Salford begins to flood. The access road in and out of the park floods.
7 Adjacent fields begin to flood in Lower Salford.
About This Location Collapse

Latitude: 40.258611° N, Longitude: 75.429167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 8 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 29 150.0 157.0 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:
Resources Collapse
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
Ask Questions/Webmaster
Page last modified: 1-Mar-2019 12:35 AM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities