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Hydrograph River at a Glance Download
Little Lehigh Creek near Allentown Stage (ft)Flow (kcfs)Observed: 0.11 ft at 7:15PM Sep 23, 2022Observed: 0.11 ft at 7:30PM Sep 23, 2022Observed: 0.11 ft at 7:45PM Sep 23, 2022Observed: 0.11 ft at 8:00PM Sep 23, 2022Observed: 0.11 ft at 8:15PM Sep 23, 2022Observed: 0.11 ft at 8:30PM Sep 23, 2022Observed: 0.11 ft at 8:45PM Sep 23, 2022Observed: 0.11 ft at 9:00PM Sep 23, 2022Observed: 0.1 ft at 9:15PM Sep 23, 2022Observed: 0.11 ft at 9:30PM Sep 23, 2022Observed: 0.11 ft at 9:45PM Sep 23, 2022Observed: 0.11 ft at 10:00PM Sep 23, 2022Observed: 0.1 ft at 10:15PM Sep 23, 2022Observed: 0.1 ft at 10:30PM Sep 23, 2022Observed: 0.1 ft at 10:45PM Sep 23, 2022Observed: 0.1 ft at 11:00PM Sep 23, 2022Observed: 0.1 ft at 11:15PM Sep 23, 2022Observed: 0.1 ft at 11:30PM Sep 23, 2022Observed: 0.1 ft at 11:45PM Sep 23, 2022Observed: 0.1 ft at 12:00AM Sep 24, 2022Observed: 0.1 ft at 12:15AM Sep 24, 2022Observed: 0.1 ft at 12:30AM Sep 24, 2022Observed: 0.1 ft at 12:45AM Sep 24, 2022Observed: 0.1 ft at 1:00AM Sep 24, 2022Observed: 0.1 ft at 1:15AM Sep 24, 2022Observed: 0.1 ft at 1:30AM Sep 24, 2022Observed: 0.1 ft at 1:45AM Sep 24, 2022Observed: 0.1 ft at 2:00AM Sep 24, 2022Observed: 0.1 ft at 2:15AM Sep 24, 2022Observed: 0.1 ft at 2:30AM Sep 24, 2022Observed: 0.1 ft at 2:45AM Sep 24, 2022Observed: 0.1 ft at 3:00AM Sep 24, 2022Observed: 0.1 ft at 3:15AM Sep 24, 2022Observed: 0.1 ft at 3:30AM Sep 24, 2022Observed: 0.1 ft at 3:45AM Sep 24, 2022Observed: 0.1 ft at 4:00AM Sep 24, 2022Observed: 0.1 ft at 4:15AM Sep 24, 2022Observed: 0.1 ft at 4:30AM Sep 24, 2022Observed: 0.1 ft at 4:45AM Sep 24, 2022Observed: 0.1 ft at 5:00AM Sep 24, 2022Observed: 0.1 ft at 5:15AM Sep 24, 2022Observed: 0.1 ft at 5:30AM Sep 24, 2022Observed: 0.1 ft at 5:45AM Sep 24, 2022Observed: 0.1 ft at 6:00AM Sep 24, 2022Observed: 0.1 ft at 6:15AM Sep 24, 2022Observed: 0.1 ft at 6:30AM Sep 24, 2022Observed: 0.1 ft at 6:45AM Sep 24, 2022Observed: 0.1 ft at 7:00AM Sep 24, 2022Observed: 0.1 ft at 7:15AM Sep 24, 2022Observed: 0.1 ft at 7:30AM Sep 24, 2022Observed: 0.1 ft at 7:45AM Sep 24, 2022Observed: 0.1 ft at 8:00AM Sep 24, 2022Observed: 0.1 ft at 8:15AM Sep 24, 2022Observed: 0.1 ft at 8:30AM Sep 24, 2022Observed: 0.1 ft at 8:45AM Sep 24, 2022Observed: 0.1 ft at 9:00AM Sep 24, 2022Observed: 0.1 ft at 9:15AM Sep 24, 2022Observed: 0.1 ft at 9:30AM Sep 24, 2022Observed: 0.1 ft at 9:45AM Sep 24, 2022Observed: 0.1 ft at 10:00AM Sep 24, 2022Observed: 0.1 ft at 10:15AM Sep 24, 2022Observed: 0.1 ft at 10:30AM Sep 24, 2022Observed: 0.1 ft at 10:45AM Sep 24, 2022Observed: 0.1 ft at 11:00AM Sep 24, 2022Observed: 0.1 ft at 11:15AM Sep 24, 2022Observed: 0.1 ft at 11:30AM Sep 24, 2022Observed: 0.1 ft at 11:45AM Sep 24, 2022Observed: 0.1 ft at 12:00PM Sep 24, 2022Observed: 0.1 ft at 12:15PM Sep 24, 2022Observed: 0.1 ft at 12:30PM Sep 24, 2022Observed: 0.1 ft at 12:45PM Sep 24, 2022Observed: 0.1 ft at 1:00PM Sep 24, 2022Observed: 0.1 ft at 1:15PM Sep 24, 2022Observed: 0.1 ft at 1:30PM Sep 24, 2022Observed: 0.1 ft at 1:45PM Sep 24, 2022Observed: 0.1 ft at 2:00PM Sep 24, 2022Observed: 0.1 ft at 2:15PM Sep 24, 2022Observed: 0.1 ft at 2:30PM Sep 24, 2022Observed: 0.1 ft at 2:45PM Sep 24, 2022Observed: 0.1 ft at 3:00PM Sep 24, 2022Observed: 0.1 ft at 3:15PM Sep 24, 2022Observed: 0.1 ft at 3:30PM Sep 24, 2022Observed: 0.1 ft at 3:45PM Sep 24, 2022Observed: 0.1 ft at 4:00PM Sep 24, 2022Observed: 0.1 ft at 4:15PM Sep 24, 2022Observed: 0.1 ft at 4:30PM Sep 24, 2022Observed: 0.1 ft at 4:45PM Sep 24, 2022Observed: 0.1 ft at 5:00PM Sep 24, 2022Observed: 0.1 ft at 5:15PM Sep 24, 2022Observed: 0.1 ft at 5:30PM Sep 24, 2022Observed: 0.1 ft at 5:45PM Sep 24, 2022Observed: 0.1 ft at 6:00PM Sep 24, 2022Observed: 0.1 ft at 6:15PM Sep 24, 2022Observed: 0.1 ft at 6:30PM Sep 24, 2022Observed: 0.1 ft at 6:45PM Sep 24, 2022Observed: 0.1 ft at 7:00PM Sep 24, 2022Observed: 0.1 ft at 7:15PM Sep 24, 2022Observed: 0.1 ft at 7:30PM Sep 24, 2022Observed: 0.1 ft at 7:45PM Sep 24, 2022Observed: 0.1 ft at 8:00PM Sep 24, 2022Observed: 0.1 ft at 8:15PM Sep 24, 2022Observed: 0.1 ft at 8:30PM Sep 24, 2022Observed: 0.1 ft at 8:45PM Sep 24, 2022Observed: 0.1 ft at 9:00PM Sep 24, 2022Observed: 0.1 ft at 9:15PM Sep 24, 2022Observed: 0.1 ft at 9:30PM Sep 24, 2022Observed: 0.1 ft at 9:45PM Sep 24, 2022Observed: 0.1 ft at 10:00PM Sep 24, 2022Observed: 0.1 ft at 10:15PM Sep 24, 2022Observed: 0.1 ft at 10:30PM Sep 24, 2022Observed: 0.1 ft at 10:45PM Sep 24, 2022Observed: 0.1 ft at 11:00PM Sep 24, 2022Observed: 0.1 ft at 11:15PM Sep 24, 2022Observed: 0.1 ft at 11:30PM Sep 24, 2022Observed: 0.1 ft at 11:45PM Sep 24, 2022Observed: 0.1 ft at 12:00AM Sep 25, 2022Observed: 0.1 ft at 12:15AM Sep 25, 2022Observed: 0.1 ft at 12:16AM Sep 25, 2022Observed: 0.09 ft at 12:30AM Sep 25, 2022Observed: 0.09 ft at 12:45AM Sep 25, 2022Observed: 0.1 ft at 1:00AM Sep 25, 2022Observed: 0.09 ft at 1:15AM Sep 25, 2022Observed: 0.09 ft at 1:30AM Sep 25, 2022Observed: 0.09 ft at 1:45AM Sep 25, 2022Observed: 0.09 ft at 2:00AM Sep 25, 2022Observed: 0.09 ft at 2:15AM Sep 25, 2022Observed: 0.1 ft at 2:30AM Sep 25, 2022Observed: 0.09 ft at 2:45AM Sep 25, 2022Observed: 0.1 ft at 3:00AM Sep 25, 2022Observed: 0.09 ft at 3:15AM Sep 25, 2022Observed: 0.1 ft at 3:30AM Sep 25, 2022Observed: 0.1 ft at 3:45AM Sep 25, 2022Observed: 0.1 ft at 4:00AM Sep 25, 2022Observed: 0.1 ft at 4:15AM Sep 25, 2022Observed: 0.1 ft at 4:30AM Sep 25, 2022Observed: 0.1 ft at 4:45AM Sep 25, 2022Observed: 0.1 ft at 5:00AM Sep 25, 2022Observed: 0.1 ft at 5:15AM Sep 25, 2022Observed: 0.1 ft at 5:30AM Sep 25, 2022Observed: 0.1 ft at 5:45AM Sep 25, 2022Observed: 0.1 ft at 6:00AM Sep 25, 2022Observed: 0.1 ft at 6:15AM Sep 25, 2022Observed: 0.1 ft at 6:30AM Sep 25, 2022Observed: 0.1 ft at 6:45AM Sep 25, 2022Observed: 0.1 ft at 7:00AM Sep 25, 2022Observed: 0.1 ft at 7:15AM Sep 25, 2022Observed: 0.1 ft at 7:30AM Sep 25, 2022Observed: 0.1 ft at 7:45AM Sep 25, 2022Observed: 0.1 ft at 8:00AM Sep 25, 2022Observed: 0.1 ft at 8:15AM Sep 25, 2022Observed: 0.1 ft at 8:30AM Sep 25, 2022Observed: 0.1 ft at 8:45AM Sep 25, 2022Observed: 0.1 ft at 9:00AM Sep 25, 2022Observed: 0.1 ft at 9:15AM Sep 25, 2022Observed: 0.1 ft at 9:30AM Sep 25, 2022Observed: 0.1 ft at 9:45AM Sep 25, 2022Observed: 0.1 ft at 10:00AM Sep 25, 2022Observed: 0.1 ft at 10:15AM Sep 25, 2022Observed: 0.1 ft at 10:30AM Sep 25, 2022Observed: 0.1 ft at 10:45AM Sep 25, 2022Observed: 0.1 ft at 11:00AM Sep 25, 2022Observed: 0.1 ft at 11:15AM Sep 25, 2022Observed: 0.1 ft at 11:30AM Sep 25, 2022Observed: 0.1 ft at 11:45AM Sep 25, 2022Observed: 0.1 ft at 12:00PM Sep 25, 2022Observed: 0.1 ft at 12:15PM Sep 25, 2022Observed: 0.1 ft at 12:30PM Sep 25, 2022Observed: 0.1 ft at 12:45PM Sep 25, 2022Observed: 0.1 ft at 1:00PM Sep 25, 2022Observed: 0.1 ft at 1:15PM Sep 25, 2022Observed: 0.1 ft at 1:30PM Sep 25, 2022Observed: 0.1 ft at 1:45PM Sep 25, 2022Observed: 0.1 ft at 2:00PM Sep 25, 2022Observed: 0.11 ft at 2:15PM Sep 25, 2022Observed: 0.11 ft at 2:30PM Sep 25, 2022Observed: 0.12 ft at 2:45PM Sep 25, 2022Observed: 0.12 ft at 3:00PM Sep 25, 2022Observed: 0.12 ft at 3:15PM Sep 25, 2022Observed: 0.13 ft at 3:30PM Sep 25, 2022Observed: 0.13 ft at 3:45PM Sep 25, 2022Observed: 0.13 ft at 4:00PM Sep 25, 2022Observed: 0.13 ft at 4:15PM Sep 25, 2022Observed: 0.13 ft at 4:30PM Sep 25, 2022Observed: 0.13 ft at 4:45PM Sep 25, 2022Observed: 0.13 ft at 5:00PM Sep 25, 2022Observed: 0.13 ft at 5:15PM Sep 25, 2022Observed: 0.13 ft at 5:30PM Sep 25, 2022Observed: 0.14 ft at 5:45PM Sep 25, 2022Observed: 0.14 ft at 6:00PM Sep 25, 2022Observed: 0.15 ft at 6:15PM Sep 25, 2022Observed: 0.15 ft at 6:30PM Sep 25, 2022Observed: 0.14 ft at 6:45PM Sep 25, 2022Observed: 0.14 ft at 7:00PM Sep 25, 2022Observed: 0.13 ft at 7:15PM Sep 25, 2022Observed: 0.13 ft at 7:30PM Sep 25, 2022Observed: 0.13 ft at 7:45PM Sep 25, 2022Observed: 0.14 ft at 8:00PM Sep 25, 2022Observed: 0.16 ft at 8:15PM Sep 25, 2022Observed: 0.3 ft at 8:30PM Sep 25, 2022Observed: 0.3 ft at 8:31PM Sep 25, 2022Observed: 0.31 ft at 8:45PM Sep 25, 2022Observed: 0.38 ft at 9:00PM Sep 25, 2022Observed: 0.45 ft at 9:15PM Sep 25, 2022Highest Observation: 0.48 ft at 9:30PM Sep 25, 2022Highest Observation: 0.48 ft at 9:31PM Sep 25, 2022Observed: 0.45 ft at 9:45PM Sep 25, 2022Observed: 0.41 ft at 10:00PM Sep 25, 2022Observed: 0.39 ft at 10:15PM Sep 25, 2022Observed: 0.42 ft at 10:30PM Sep 25, 2022Observed: 0.42 ft at 10:31PM Sep 25, 2022Observed: 0.45 ft at 10:45PM Sep 25, 2022Observed: 0.45 ft at 11:00PM Sep 25, 2022Observed: 0.41 ft at 11:15PM Sep 25, 2022Observed: 0.38 ft at 11:30PM Sep 25, 2022Observed: 0.36 ft at 11:45PM Sep 25, 2022Observed: 0.36 ft at 12:00AM Sep 26, 2022Observed: 0.37 ft at 12:15AM Sep 26, 2022Observed: 0.39 ft at 12:30AM Sep 26, 2022Observed: 0.39 ft at 12:45AM Sep 26, 2022Observed: 0.38 ft at 1:00AM Sep 26, 2022Observed: 0.36 ft at 1:15AM Sep 26, 2022Observed: 0.34 ft at 1:30AM Sep 26, 2022Observed: 0.32 ft at 1:45AM Sep 26, 2022Observed: 0.31 ft at 2:00AM Sep 26, 2022Observed: 0.29 ft at 2:15AM Sep 26, 2022Observed: 0.29 ft at 2:30AM Sep 26, 2022Observed: 0.29 ft at 2:45AM Sep 26, 2022Observed: 0.29 ft at 3:00AM Sep 26, 2022Observed: 0.3 ft at 3:15AM Sep 26, 2022Observed: 0.31 ft at 3:30AM Sep 26, 2022Observed: 0.32 ft at 3:45AM Sep 26, 2022Observed: 0.32 ft at 4:00AM Sep 26, 2022Observed: 0.32 ft at 4:15AM Sep 26, 2022Observed: 0.32 ft at 4:30AM Sep 26, 2022Observed: 0.32 ft at 4:45AM Sep 26, 2022Observed: 0.32 ft at 5:00AM Sep 26, 2022Observed: 0.31 ft at 5:15AM Sep 26, 2022Observed: 0.31 ft at 5:30AM Sep 26, 2022Observed: 0.31 ft at 5:45AM Sep 26, 2022Observed: 0.31 ft at 6:00AM Sep 26, 2022Observed: 0.31 ft at 6:15AM Sep 26, 2022Observed: 0.31 ft at 6:30AM Sep 26, 2022Observed: 0.31 ft at 6:45AM Sep 26, 2022Observed: 0.31 ft at 7:00AM Sep 26, 2022Observed: 0.3 ft at 7:15AM Sep 26, 2022Observed: 0.3 ft at 7:30AM Sep 26, 2022Observed: 0.3 ft at 7:45AM Sep 26, 2022Observed: 0.3 ft at 8:00AM Sep 26, 2022Observed: 0.3 ft at 8:15AM Sep 26, 2022Observed: 0.3 ft at 8:30AM Sep 26, 2022Observed: 0.3 ft at 8:45AM Sep 26, 2022Observed: 0.3 ft at 9:00AM Sep 26, 2022Observed: 0.29 ft at 9:15AM Sep 26, 2022Observed: 0.29 ft at 9:30AM Sep 26, 2022Observed: 0.29 ft at 9:45AM Sep 26, 2022Observed: 0.29 ft at 10:00AM Sep 26, 2022Observed: 0.3 ft at 10:15AM Sep 26, 2022Observed: 0.3 ft at 10:30AM Sep 26, 2022Observed: 0.3 ft at 10:45AM Sep 26, 2022Observed: 0.31 ft at 11:00AM Sep 26, 2022Observed: 0.32 ft at 11:15AM Sep 26, 2022Observed: 0.34 ft at 11:30AM Sep 26, 2022Observed: 0.35 ft at 11:45AM Sep 26, 2022Observed: 0.36 ft at 12:00PM Sep 26, 2022Observed: 0.38 ft at 12:15PM Sep 26, 2022Observed: 0.39 ft at 12:30PM Sep 26, 2022Observed: 0.4 ft at 12:45PM Sep 26, 2022Observed: 0.41 ft at 1:00PM Sep 26, 2022Observed: 0.41 ft at 1:15PM Sep 26, 2022Observed: 0.41 ft at 1:30PM Sep 26, 2022Observed: 0.42 ft at 1:45PM Sep 26, 2022Observed: 0.42 ft at 2:00PM Sep 26, 2022Observed: 0.42 ft at 2:15PM Sep 26, 2022Observed: 0.42 ft at 2:30PM Sep 26, 2022Observed: 0.4 ft at 3:45PM Sep 26, 2022Observed: 0.4 ft at 4:00PM Sep 26, 2022Observed: 0.39 ft at 4:15PM Sep 26, 2022Observed: 0.38 ft at 4:30PM Sep 26, 2022Observed: 0.38 ft at 4:45PM Sep 26, 2022Observed: 0.37 ft at 5:00PM Sep 26, 2022Observed: 0.36 ft at 5:15PM Sep 26, 2022Observed: 0.36 ft at 5:30PM Sep 26, 2022Observed: 0.35 ft at 5:45PM Sep 26, 2022Observed: 0.34 ft at 6:00PM Sep 26, 2022Observed: 0.34 ft at 6:15PM Sep 26, 2022Observed: 0.33 ft at 6:30PM Sep 26, 2022USGS--Water Resources of the United StatesALLP1(plotting HGIRG) Graph Created (7:03PM Sep 26, 2022)ObservedLatest observed value: 0.33 ft at 6:30 PM EDT 26-Sep-2022. 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 Little Lehigh Creek near Allentown. Only observed stages are available for this point.
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Downstream Gauge Downstream Gauge - at Allentown
Flood Categories (in feet)
Major Flood Stage: 10
Moderate Flood Stage: 8
Flood Stage: 5
Action Stage: 4
Low Stage (in feet): 0

Historic Crests
(1) 11.80 ft on 06/22/1972
(2) 10.93 ft on 10/08/2005
(3) 10.76 ft on 01/25/1979
(4) 10.63 ft on 09/18/2004
(5) 9.82 ft on 09/02/2021
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 9.82 ft on 09/02/2021
(2) 5.29 ft on 12/25/2020
(3) 5.15 ft on 12/01/2020
(4) 8.62 ft on 11/03/2018
(5) 7.64 ft on 08/14/2018
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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
7 Significant flooding occurs on both Millcreek Road and Macungie Road in Lower Macungie Township. The roads are impassable with several feet of moving water.
5.5 Millcreek Road at Hauser Road, Wild Cherry Lane, and Macungie Road in Lower Macungie Township begin to flood.
5 Spring Creek Road in Lower Macungie Township begins to flood between Millcreek Road and Millcreek Road. Spring Creek Road in Lower Macungie begins to flood between Heather Road and Laurel Lane. Creamery Road and Mill Race Road in Macungie Township also flood. Road closures and detours are put in place.
4 Water begins to overflow the lowest banks of the Little Lehigh and into designated open field and floodplain. Portions of the Millbrook Farms Recreation Area, the Danfield Run Passive Recreation Area, and the Winding Brook Manor Recreational Area begin to flood.
About This Location Collapse

Latitude: 40.582222° N, Longitude: 75.483333° 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 29 253.41 ft 259.41 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
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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