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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.



Hydrograph River at a Glance Download
West Branch Perkiomen Creek at Hillegass Stage (ft)Flow (kcfs)Observed: 0.79 ft at 4:30AM May 30, 2023Observed: 0.79 ft at 4:45AM May 30, 2023Observed: 0.79 ft at 5:00AM May 30, 2023Observed: 0.79 ft at 5:15AM May 30, 2023Observed: 0.79 ft at 5:30AM May 30, 2023Observed: 0.79 ft at 5:45AM May 30, 2023Observed: 0.79 ft at 6:00AM May 30, 2023Observed: 0.79 ft at 6:15AM May 30, 2023Observed: 0.79 ft at 6:30AM May 30, 2023Observed: 0.79 ft at 6:45AM May 30, 2023Observed: 0.79 ft at 7:00AM May 30, 2023Observed: 0.79 ft at 7:15AM May 30, 2023Observed: 0.79 ft at 7:30AM May 30, 2023Observed: 0.79 ft at 7:45AM May 30, 2023Observed: 0.79 ft at 8:00AM May 30, 2023Observed: 0.79 ft at 8:15AM May 30, 2023Observed: 0.79 ft at 8:30AM May 30, 2023Observed: 0.79 ft at 8:45AM May 30, 2023Observed: 0.79 ft at 9:00AM May 30, 2023Observed: 0.79 ft at 9:15AM May 30, 2023Observed: 0.79 ft at 9:30AM May 30, 2023Observed: 0.79 ft at 9:45AM May 30, 2023Observed: 0.79 ft at 10:00AM May 30, 2023Observed: 0.79 ft at 10:15AM May 30, 2023Observed: 0.79 ft at 10:30AM May 30, 2023Observed: 0.79 ft at 10:45AM May 30, 2023Observed: 0.79 ft at 11:00AM May 30, 2023Observed: 0.79 ft at 11:15AM May 30, 2023Observed: 0.79 ft at 11:30AM May 30, 2023Observed: 0.79 ft at 11:45AM May 30, 2023Observed: 0.79 ft at 12:00PM May 30, 2023Observed: 0.79 ft at 12:15PM May 30, 2023Observed: 0.79 ft at 12:30PM May 30, 2023Observed: 0.79 ft at 12:45PM May 30, 2023Observed: 0.79 ft at 1:00PM May 30, 2023Observed: 0.79 ft at 1:15PM May 30, 2023Observed: 0.79 ft at 1:30PM May 30, 2023Observed: 0.79 ft at 1:45PM May 30, 2023Observed: 0.79 ft at 2:00PM May 30, 2023Observed: 0.79 ft at 2:15PM May 30, 2023Observed: 0.79 ft at 2:30PM May 30, 2023Observed: 0.79 ft at 2:45PM May 30, 2023Observed: 0.79 ft at 3:00PM May 30, 2023Observed: 0.79 ft at 3:15PM May 30, 2023Observed: 0.79 ft at 3:30PM May 30, 2023Observed: 0.79 ft at 3:45PM May 30, 2023Observed: 0.79 ft at 4:00PM May 30, 2023Observed: 0.79 ft at 4:15PM May 30, 2023Observed: 0.79 ft at 4:30PM May 30, 2023Observed: 0.79 ft at 4:45PM May 30, 2023Observed: 0.79 ft at 5:00PM May 30, 2023Observed: 0.79 ft at 5:15PM May 30, 2023Observed: 0.79 ft at 5:30PM May 30, 2023Observed: 0.79 ft at 5:45PM May 30, 2023Observed: 0.79 ft at 6:00PM May 30, 2023Observed: 0.79 ft at 6:15PM May 30, 2023Observed: 0.79 ft at 6:16PM May 30, 2023Observed: 0.79 ft at 6:30PM May 30, 2023Observed: 0.79 ft at 6:45PM May 30, 2023Observed: 0.79 ft at 7:00PM May 30, 2023Observed: 0.79 ft at 7:15PM May 30, 2023Observed: 0.79 ft at 7:30PM May 30, 2023Observed: 0.79 ft at 7:45PM May 30, 2023Observed: 0.79 ft at 8:00PM May 30, 2023Observed: 0.79 ft at 8:15PM May 30, 2023Observed: 0.79 ft at 8:30PM May 30, 2023Observed: 0.79 ft at 8:45PM May 30, 2023Observed: 0.79 ft at 9:00PM May 30, 2023Observed: 0.79 ft at 9:15PM May 30, 2023Observed: 0.79 ft at 9:30PM May 30, 2023Observed: 0.79 ft at 9:45PM May 30, 2023Observed: 0.79 ft at 10:00PM May 30, 2023Observed: 0.79 ft at 10:15PM May 30, 2023Observed: 0.79 ft at 10:30PM May 30, 2023Observed: 0.79 ft at 10:45PM May 30, 2023Observed: 0.79 ft at 11:00PM May 30, 2023Observed: 0.79 ft at 11:15PM May 30, 2023Observed: 0.79 ft at 11:30PM May 30, 2023Observed: 0.79 ft at 11:45PM May 30, 2023Observed: 0.79 ft at 12:00AM May 31, 2023Observed: 0.79 ft at 12:15AM May 31, 2023Observed: 0.79 ft at 12:30AM May 31, 2023Observed: 0.79 ft at 12:45AM May 31, 2023Observed: 0.79 ft at 1:00AM May 31, 2023Observed: 0.79 ft at 1:15AM May 31, 2023Observed: 0.79 ft at 1:30AM May 31, 2023Observed: 0.79 ft at 1:45AM May 31, 2023Observed: 0.79 ft at 2:00AM May 31, 2023Observed: 0.79 ft at 2:15AM May 31, 2023Observed: 0.79 ft at 2:30AM May 31, 2023Observed: 0.79 ft at 2:45AM May 31, 2023Observed: 0.79 ft at 3:00AM May 31, 2023Observed: 0.79 ft at 3:15AM May 31, 2023Observed: 0.79 ft at 3:30AM May 31, 2023Observed: 0.79 ft at 3:45AM May 31, 2023Observed: 0.79 ft at 4:00AM May 31, 2023Observed: 0.79 ft at 4:15AM May 31, 2023Observed: 0.79 ft at 4:30AM May 31, 2023Observed: 0.79 ft at 4:45AM May 31, 2023Observed: 0.79 ft at 5:00AM May 31, 2023Observed: 0.79 ft at 5:15AM May 31, 2023Observed: 0.79 ft at 5:30AM May 31, 2023Observed: 0.79 ft at 5:45AM May 31, 2023Observed: 0.79 ft at 6:00AM May 31, 2023Observed: 0.79 ft at 6:15AM May 31, 2023Observed: 0.79 ft at 6:16AM May 31, 2023Observed: 0.79 ft at 6:30AM May 31, 2023Observed: 0.79 ft at 6:45AM May 31, 2023Observed: 0.79 ft at 7:00AM May 31, 2023Observed: 0.79 ft at 7:15AM May 31, 2023Observed: 0.79 ft at 7:30AM May 31, 2023Observed: 0.79 ft at 7:45AM May 31, 2023Observed: 0.79 ft at 8:00AM May 31, 2023Observed: 0.79 ft at 8:15AM May 31, 2023Observed: 0.79 ft at 8:30AM May 31, 2023Observed: 0.79 ft at 8:45AM May 31, 2023Observed: 0.79 ft at 9:00AM May 31, 2023Observed: 0.79 ft at 9:15AM May 31, 2023Observed: 0.79 ft at 9:30AM May 31, 2023Observed: 0.79 ft at 9:45AM May 31, 2023Observed: 0.79 ft at 10:00AM May 31, 2023Observed: 0.79 ft at 10:15AM May 31, 2023Observed: 0.79 ft at 10:30AM May 31, 2023Observed: 0.79 ft at 10:45AM May 31, 2023Observed: 0.79 ft at 11:00AM May 31, 2023Observed: 0.79 ft at 11:15AM May 31, 2023Observed: 0.79 ft at 11:30AM May 31, 2023Observed: 0.79 ft at 11:45AM May 31, 2023Observed: 0.79 ft at 12:00PM May 31, 2023Observed: 0.79 ft at 12:15PM May 31, 2023Observed: 0.79 ft at 12:30PM May 31, 2023Observed: 0.79 ft at 12:45PM May 31, 2023Observed: 0.79 ft at 1:00PM May 31, 2023Observed: 0.79 ft at 1:15PM May 31, 2023Observed: 0.79 ft at 1:30PM May 31, 2023Observed: 0.79 ft at 1:45PM May 31, 2023Observed: 0.79 ft at 2:00PM May 31, 2023Observed: 0.79 ft at 2:15PM May 31, 2023Observed: 0.79 ft at 2:30PM May 31, 2023Observed: 0.79 ft at 2:45PM May 31, 2023Observed: 0.79 ft at 3:00PM May 31, 2023Observed: 0.79 ft at 3:15PM May 31, 2023Observed: 0.79 ft at 3:30PM May 31, 2023Observed: 0.79 ft at 3:45PM May 31, 2023Observed: 0.79 ft at 4:00PM May 31, 2023Observed: 0.79 ft at 4:15PM May 31, 2023Observed: 0.79 ft at 4:30PM May 31, 2023Observed: 0.79 ft at 4:45PM May 31, 2023Observed: 0.79 ft at 5:00PM May 31, 2023Observed: 0.79 ft at 5:15PM May 31, 2023Highest Observation: 0.8 ft at 5:30PM May 31, 2023Highest Observation: 0.8 ft at 5:45PM May 31, 2023Observed: 0.79 ft at 6:00PM May 31, 2023Observed: 0.79 ft at 6:15PM May 31, 2023Observed: 0.79 ft at 6:16PM May 31, 2023Observed: 0.79 ft at 6:30PM May 31, 2023Observed: 0.79 ft at 6:45PM May 31, 2023Observed: 0.79 ft at 7:00PM May 31, 2023Observed: 0.79 ft at 7:15PM May 31, 2023Observed: 0.79 ft at 7:30PM May 31, 2023Observed: 0.79 ft at 7:45PM May 31, 2023Observed: 0.79 ft at 8:00PM May 31, 2023Observed: 0.79 ft at 8:15PM May 31, 2023Observed: 0.79 ft at 8:30PM May 31, 2023Observed: 0.79 ft at 8:45PM May 31, 2023Observed: 0.79 ft at 9:00PM May 31, 2023Observed: 0.79 ft at 9:15PM May 31, 2023Observed: 0.79 ft at 9:30PM May 31, 2023Highest Observation: 0.8 ft at 9:45PM May 31, 2023Highest Observation: 0.8 ft at 10:00PM May 31, 2023Observed: 0.79 ft at 10:15PM May 31, 2023Observed: 0.79 ft at 10:30PM May 31, 2023Observed: 0.79 ft at 10:45PM May 31, 2023Observed: 0.79 ft at 11:00PM May 31, 2023Observed: 0.79 ft at 11:15PM May 31, 2023Observed: 0.79 ft at 11:30PM May 31, 2023Observed: 0.79 ft at 11:45PM May 31, 2023Observed: 0.79 ft at 12:00AM Jun 01, 2023Observed: 0.79 ft at 12:15AM Jun 01, 2023Observed: 0.79 ft at 12:30AM Jun 01, 2023Observed: 0.79 ft at 12:45AM Jun 01, 2023Observed: 0.79 ft at 1:00AM Jun 01, 2023Observed: 0.79 ft at 1:15AM Jun 01, 2023Observed: 0.79 ft at 1:30AM Jun 01, 2023Observed: 0.79 ft at 1:45AM Jun 01, 2023Observed: 0.79 ft at 2:00AM Jun 01, 2023Observed: 0.79 ft at 2:15AM Jun 01, 2023Observed: 0.79 ft at 2:30AM Jun 01, 2023Observed: 0.79 ft at 2:45AM Jun 01, 2023Observed: 0.79 ft at 3:00AM Jun 01, 2023Observed: 0.79 ft at 3:15AM Jun 01, 2023Observed: 0.79 ft at 3:30AM Jun 01, 2023Observed: 0.79 ft at 3:45AM Jun 01, 2023Observed: 0.79 ft at 4:00AM Jun 01, 2023Observed: 0.79 ft at 4:15AM Jun 01, 2023Observed: 0.79 ft at 4:30AM Jun 01, 2023Observed: 0.79 ft at 4:45AM Jun 01, 2023Observed: 0.79 ft at 5:00AM Jun 01, 2023Observed: 0.79 ft at 5:15AM Jun 01, 2023Observed: 0.79 ft at 5:30AM Jun 01, 2023Observed: 0.79 ft at 5:45AM Jun 01, 2023Observed: 0.79 ft at 6:00AM Jun 01, 2023Observed: 0.79 ft at 6:15AM Jun 01, 2023Observed: 0.79 ft at 6:30AM Jun 01, 2023Observed: 0.79 ft at 6:32AM Jun 01, 2023Observed: 0.79 ft at 6:45AM Jun 01, 2023Observed: 0.79 ft at 7:00AM Jun 01, 2023Observed: 0.79 ft at 7:15AM Jun 01, 2023Observed: 0.79 ft at 7:30AM Jun 01, 2023Observed: 0.79 ft at 7:45AM Jun 01, 2023Observed: 0.79 ft at 8:00AM Jun 01, 2023Observed: 0.79 ft at 8:15AM Jun 01, 2023Observed: 0.79 ft at 8:30AM Jun 01, 2023Observed: 0.79 ft at 8:45AM Jun 01, 2023Observed: 0.79 ft at 9:00AM Jun 01, 2023Observed: 0.79 ft at 9:15AM Jun 01, 2023Observed: 0.79 ft at 9:30AM Jun 01, 2023Observed: 0.79 ft at 9:45AM Jun 01, 2023Observed: 0.79 ft at 10:00AM Jun 01, 2023Observed: 0.79 ft at 10:15AM Jun 01, 2023Observed: 0.79 ft at 10:30AM Jun 01, 2023Observed: 0.79 ft at 10:45AM Jun 01, 2023Observed: 0.79 ft at 11:00AM Jun 01, 2023Observed: 0.79 ft at 11:15AM Jun 01, 2023Observed: 0.79 ft at 11:30AM Jun 01, 2023Observed: 0.79 ft at 11:45AM Jun 01, 2023Observed: 0.79 ft at 12:00PM Jun 01, 2023Observed: 0.79 ft at 12:15PM Jun 01, 2023Observed: 0.79 ft at 12:30PM Jun 01, 2023Observed: 0.79 ft at 12:45PM Jun 01, 2023Observed: 0.79 ft at 1:00PM Jun 01, 2023Observed: 0.78 ft at 1:15PM Jun 01, 2023Observed: 0.78 ft at 1:30PM Jun 01, 2023Observed: 0.78 ft at 1:45PM Jun 01, 2023Observed: 0.79 ft at 2:00PM Jun 01, 2023Observed: 0.79 ft at 2:15PM Jun 01, 2023Observed: 0.79 ft at 2:30PM Jun 01, 2023Observed: 0.79 ft at 2:45PM Jun 01, 2023Observed: 0.79 ft at 3:00PM Jun 01, 2023Observed: 0.79 ft at 3:15PM Jun 01, 2023Observed: 0.79 ft at 3:30PM Jun 01, 2023Observed: 0.79 ft at 3:45PM Jun 01, 2023Observed: 0.79 ft at 4:00PM Jun 01, 2023Observed: 0.79 ft at 4:15PM Jun 01, 2023Observed: 0.79 ft at 4:30PM Jun 01, 2023Observed: 0.79 ft at 4:45PM Jun 01, 2023Observed: 0.79 ft at 5:00PM Jun 01, 2023Observed: 0.79 ft at 5:15PM Jun 01, 2023Observed: 0.79 ft at 6:30PM Jun 01, 2023Observed: 0.79 ft at 6:32PM Jun 01, 2023Observed: 0.79 ft at 6:45PM Jun 01, 2023Observed: 0.79 ft at 7:00PM Jun 01, 2023Observed: 0.79 ft at 7:15PM Jun 01, 2023Observed: 0.79 ft at 7:30PM Jun 01, 2023Observed: 0.79 ft at 7:45PM Jun 01, 2023Observed: 0.79 ft at 8:00PM Jun 01, 2023Observed: 0.79 ft at 8:15PM Jun 01, 2023Observed: 0.79 ft at 8:30PM Jun 01, 2023Observed: 0.79 ft at 8:45PM Jun 01, 2023Observed: 0.79 ft at 9:00PM Jun 01, 2023Observed: 0.79 ft at 9:15PM Jun 01, 2023Observed: 0.79 ft at 9:30PM Jun 01, 2023Observed: 0.79 ft at 9:45PM Jun 01, 2023Observed: 0.79 ft at 10:00PM Jun 01, 2023Observed: 0.79 ft at 10:15PM Jun 01, 2023Observed: 0.79 ft at 10:30PM Jun 01, 2023Observed: 0.79 ft at 10:45PM Jun 01, 2023Observed: 0.79 ft at 11:00PM Jun 01, 2023Observed: 0.79 ft at 11:15PM Jun 01, 2023Observed: 0.79 ft at 11:30PM Jun 01, 2023Observed: 0.79 ft at 11:45PM Jun 01, 2023Observed: 0.79 ft at 12:00AM Jun 02, 2023Observed: 0.79 ft at 12:15AM Jun 02, 2023Observed: 0.79 ft at 12:30AM Jun 02, 2023Observed: 0.79 ft at 12:45AM Jun 02, 2023Observed: 0.79 ft at 1:00AM Jun 02, 2023Observed: 0.79 ft at 1:15AM Jun 02, 2023Observed: 0.79 ft at 1:30AM Jun 02, 2023Observed: 0.79 ft at 1:45AM Jun 02, 2023Observed: 0.79 ft at 2:00AM Jun 02, 2023Observed: 0.79 ft at 2:15AM Jun 02, 2023Observed: 0.79 ft at 2:30AM Jun 02, 2023Observed: 0.79 ft at 2:45AM Jun 02, 2023Observed: 0.79 ft at 3:00AM Jun 02, 2023Observed: 0.79 ft at 3:15AM Jun 02, 2023USGS--Water Resources of the United StatesHLGP1(plotting HGIRG) Graph Created (4:18AM Jun 2, 2023)ObservedLatest observed value: 0.79 ft at 3:15 AM EDT 2-Jun-2023. Flood Stage is 5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the West Branch Perkiomen Creek at Hillegass. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 8
Moderate Flood Stage: 6
Flood Stage: 5
Action Stage: 4
Low Stage (in feet): 0

Historic Crests
(1) 6.68 ft on 08/04/2020 (P)
(2) 6.53 ft on 07/11/2019
(3) 6.45 ft on 10/08/2005
(4) 6.42 ft on 09/02/2021
(5) 6.34 ft on 01/19/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 6.42 ft on 09/02/2021
(2) 5.27 ft on 11/30/2020
(3) 6.68 ft on 08/04/2020 (P)
(4) 6.53 ft on 07/11/2019
(5) 5.43 ft on 11/03/2018
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.
About This Location Collapse

Latitude: 40.373889° N, Longitude: 75.522778° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 290.0 295.0 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:
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Hydrologic Resources Additional Resources
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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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