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Hydrograph River at a Glance Download
Lehigh River at Bethlehem Stage (ft)Flow (kcfs)Observed: 2.14 ft at 3:45PM May 07, 2024Observed: 2.14 ft at 4:00PM May 07, 2024Observed: 2.14 ft at 4:15PM May 07, 2024Observed: 2.14 ft at 4:30PM May 07, 2024Observed: 2.14 ft at 4:45PM May 07, 2024Observed: 2.13 ft at 5:00PM May 07, 2024Observed: 2.14 ft at 5:15PM May 07, 2024Observed: 2.14 ft at 5:30PM May 07, 2024Observed: 2.14 ft at 5:45PM May 07, 2024Observed: 2.13 ft at 6:00PM May 07, 2024Observed: 2.14 ft at 6:15PM May 07, 2024Observed: 2.13 ft at 6:30PM May 07, 2024Observed: 2.13 ft at 6:45PM May 07, 2024Observed: 2.13 ft at 7:00PM May 07, 2024Observed: 2.14 ft at 7:15PM May 07, 2024Observed: 2.13 ft at 7:30PM May 07, 2024Observed: 2.13 ft at 7:45PM May 07, 2024Observed: 2.13 ft at 8:00PM May 07, 2024Observed: 2.13 ft at 8:15PM May 07, 2024Observed: 2.13 ft at 8:30PM May 07, 2024Observed: 2.13 ft at 8:45PM May 07, 2024Observed: 2.13 ft at 9:00PM May 07, 2024Observed: 2.13 ft at 9:15PM May 07, 2024Observed: 2.14 ft at 9:30PM May 07, 2024Observed: 2.13 ft at 9:45PM May 07, 2024Observed: 2.13 ft at 10:00PM May 07, 2024Observed: 2.13 ft at 10:15PM May 07, 2024Observed: 2.13 ft at 10:30PM May 07, 2024Observed: 2.13 ft at 10:45PM May 07, 2024Observed: 2.13 ft at 11:00PM May 07, 2024Observed: 2.13 ft at 11:15PM May 07, 2024Observed: 2.12 ft at 11:30PM May 07, 2024Observed: 2.13 ft at 11:45PM May 07, 2024Observed: 2.13 ft at 12:00AM May 08, 2024Observed: 2.13 ft at 12:15AM May 08, 2024Observed: 2.12 ft at 12:30AM May 08, 2024Observed: 2.12 ft at 12:45AM May 08, 2024Observed: 2.12 ft at 1:00AM May 08, 2024Observed: 2.12 ft at 1:15AM May 08, 2024Observed: 2.12 ft at 1:30AM May 08, 2024Observed: 2.12 ft at 1:45AM May 08, 2024Observed: 2.12 ft at 2:00AM May 08, 2024Observed: 2.12 ft at 2:15AM May 08, 2024Observed: 2.11 ft at 2:30AM May 08, 2024Observed: 2.11 ft at 2:45AM May 08, 2024Observed: 2.11 ft at 3:00AM May 08, 2024Observed: 2.11 ft at 3:15AM May 08, 2024Observed: 2.11 ft at 3:30AM May 08, 2024Observed: 2.11 ft at 3:45AM May 08, 2024Observed: 2.11 ft at 4:00AM May 08, 2024Observed: 2.11 ft at 4:15AM May 08, 2024Observed: 2.1 ft at 4:30AM May 08, 2024Observed: 2.1 ft at 4:45AM May 08, 2024Observed: 2.1 ft at 5:00AM May 08, 2024Observed: 2.1 ft at 5:15AM May 08, 2024Observed: 2.1 ft at 5:30AM May 08, 2024Observed: 2.1 ft at 5:45AM May 08, 2024Observed: 2.1 ft at 6:00AM May 08, 2024Observed: 2.1 ft at 6:15AM May 08, 2024Observed: 2.11 ft at 6:30AM May 08, 2024Observed: 2.15 ft at 6:45AM May 08, 2024Observed: 2.13 ft at 7:00AM May 08, 2024Observed: 2.12 ft at 7:15AM May 08, 2024Observed: 2.12 ft at 7:30AM May 08, 2024Observed: 2.12 ft at 7:45AM May 08, 2024Observed: 2.12 ft at 8:00AM May 08, 2024Observed: 2.12 ft at 8:15AM May 08, 2024Observed: 2.14 ft at 8:30AM May 08, 2024Observed: 2.14 ft at 8:45AM May 08, 2024Observed: 2.15 ft at 9:00AM May 08, 2024Observed: 2.15 ft at 9:15AM May 08, 2024Observed: 2.16 ft at 9:30AM May 08, 2024Observed: 2.15 ft at 9:45AM May 08, 2024Observed: 2.15 ft at 10:00AM May 08, 2024Observed: 2.14 ft at 10:15AM May 08, 2024Observed: 2.14 ft at 10:30AM May 08, 2024Observed: 2.14 ft at 10:45AM May 08, 2024Observed: 2.14 ft at 11:00AM May 08, 2024Observed: 2.13 ft at 11:15AM May 08, 2024Observed: 2.13 ft at 11:30AM May 08, 2024Observed: 2.13 ft at 11:45AM May 08, 2024Observed: 2.14 ft at 12:00PM May 08, 2024Observed: 2.13 ft at 12:15PM May 08, 2024Observed: 2.13 ft at 12:30PM May 08, 2024Observed: 2.14 ft at 12:45PM May 08, 2024Observed: 2.14 ft at 1:00PM May 08, 2024Observed: 2.14 ft at 1:15PM May 08, 2024Observed: 2.14 ft at 1:30PM May 08, 2024Observed: 2.14 ft at 1:45PM May 08, 2024Observed: 2.14 ft at 2:00PM May 08, 2024Observed: 2.14 ft at 2:15PM May 08, 2024Observed: 2.14 ft at 2:30PM May 08, 2024Observed: 2.14 ft at 2:45PM May 08, 2024Observed: 2.14 ft at 3:00PM May 08, 2024Observed: 2.14 ft at 3:15PM May 08, 2024Observed: 2.14 ft at 3:30PM May 08, 2024Observed: 2.14 ft at 3:45PM May 08, 2024Observed: 2.14 ft at 4:00PM May 08, 2024Observed: 2.14 ft at 4:15PM May 08, 2024Observed: 2.14 ft at 4:30PM May 08, 2024Observed: 2.13 ft at 4:45PM May 08, 2024Observed: 2.13 ft at 5:00PM May 08, 2024Observed: 2.13 ft at 5:15PM May 08, 2024Observed: 2.12 ft at 5:30PM May 08, 2024Observed: 2.13 ft at 5:45PM May 08, 2024Observed: 2.12 ft at 6:00PM May 08, 2024Observed: 2.12 ft at 6:15PM May 08, 2024Observed: 2.12 ft at 6:30PM May 08, 2024Observed: 2.11 ft at 6:45PM May 08, 2024Observed: 2.11 ft at 7:00PM May 08, 2024Observed: 2.11 ft at 7:15PM May 08, 2024Observed: 2.1 ft at 7:30PM May 08, 2024Observed: 2.1 ft at 7:45PM May 08, 2024Observed: 2.1 ft at 8:00PM May 08, 2024Observed: 2.09 ft at 8:15PM May 08, 2024Observed: 2.08 ft at 8:30PM May 08, 2024Observed: 2.08 ft at 8:45PM May 08, 2024Observed: 2.08 ft at 9:00PM May 08, 2024Observed: 2.07 ft at 9:15PM May 08, 2024Observed: 2.07 ft at 9:30PM May 08, 2024Observed: 2.07 ft at 9:45PM May 08, 2024Observed: 2.07 ft at 10:00PM May 08, 2024Observed: 2.07 ft at 10:15PM May 08, 2024Observed: 2.07 ft at 10:30PM May 08, 2024Observed: 2.06 ft at 10:45PM May 08, 2024Observed: 2.06 ft at 11:00PM May 08, 2024Observed: 2.07 ft at 11:15PM May 08, 2024Observed: 2.06 ft at 11:30PM May 08, 2024Observed: 2.06 ft at 11:45PM May 08, 2024Observed: 2.06 ft at 12:00AM May 09, 2024Observed: 2.06 ft at 12:15AM May 09, 2024Observed: 2.06 ft at 12:30AM May 09, 2024Observed: 2.05 ft at 12:45AM May 09, 2024Observed: 2.05 ft at 1:00AM May 09, 2024Observed: 2.05 ft at 1:15AM May 09, 2024Observed: 2.05 ft at 1:30AM May 09, 2024Observed: 2.05 ft at 1:45AM May 09, 2024Observed: 2.05 ft at 2:00AM May 09, 2024Observed: 2.04 ft at 2:15AM May 09, 2024Observed: 2.05 ft at 2:30AM May 09, 2024Observed: 2.04 ft at 2:45AM May 09, 2024Observed: 2.04 ft at 3:00AM May 09, 2024Observed: 2.05 ft at 3:15AM May 09, 2024Observed: 2.04 ft at 3:30AM May 09, 2024Observed: 2.04 ft at 3:45AM May 09, 2024Observed: 2.04 ft at 4:00AM May 09, 2024Observed: 2.04 ft at 4:15AM May 09, 2024Observed: 2.04 ft at 4:30AM May 09, 2024Observed: 2.04 ft at 4:45AM May 09, 2024Observed: 2.03 ft at 5:00AM May 09, 2024Observed: 2.03 ft at 5:15AM May 09, 2024Observed: 2.03 ft at 5:30AM May 09, 2024Observed: 2.04 ft at 5:45AM May 09, 2024Observed: 2.03 ft at 6:00AM May 09, 2024Observed: 2.03 ft at 6:15AM May 09, 2024Observed: 2.03 ft at 6:30AM May 09, 2024Observed: 2.03 ft at 6:45AM May 09, 2024Observed: 2.03 ft at 7:00AM May 09, 2024Observed: 2.03 ft at 7:15AM May 09, 2024Observed: 2.02 ft at 7:30AM May 09, 2024Observed: 2.03 ft at 7:45AM May 09, 2024Observed: 2.03 ft at 8:00AM May 09, 2024Observed: 2.03 ft at 8:15AM May 09, 2024Observed: 2.03 ft at 8:30AM May 09, 2024Observed: 2.03 ft at 8:45AM May 09, 2024Observed: 2.03 ft at 9:00AM May 09, 2024Observed: 2.03 ft at 9:15AM May 09, 2024Observed: 2.03 ft at 9:30AM May 09, 2024Observed: 2.03 ft at 9:45AM May 09, 2024Observed: 2.03 ft at 10:00AM May 09, 2024Observed: 2.03 ft at 10:15AM May 09, 2024Observed: 2.03 ft at 10:30AM May 09, 2024Observed: 2.03 ft at 10:45AM May 09, 2024Observed: 2.02 ft at 11:00AM May 09, 2024Observed: 2.03 ft at 11:15AM May 09, 2024Observed: 2.03 ft at 11:30AM May 09, 2024Observed: 2.03 ft at 11:45AM May 09, 2024Observed: 2.03 ft at 12:00PM May 09, 2024Observed: 2.03 ft at 12:15PM May 09, 2024Observed: 2.02 ft at 12:30PM May 09, 2024Observed: 2.03 ft at 12:45PM May 09, 2024Observed: 2.02 ft at 1:00PM May 09, 2024Observed: 2.03 ft at 1:15PM May 09, 2024Observed: 2.03 ft at 1:30PM May 09, 2024Observed: 2.02 ft at 1:45PM May 09, 2024Observed: 2.02 ft at 2:00PM May 09, 2024Observed: 2.02 ft at 2:15PM May 09, 2024Observed: 2.02 ft at 2:30PM May 09, 2024Observed: 2.02 ft at 2:45PM May 09, 2024Observed: 2.02 ft at 3:00PM May 09, 2024Observed: 2.02 ft at 3:15PM May 09, 2024Observed: 2.02 ft at 3:30PM May 09, 2024Observed: 2.02 ft at 3:45PM May 09, 2024Observed: 2.02 ft at 4:00PM May 09, 2024Observed: 2.01 ft at 4:15PM May 09, 2024Observed: 2.02 ft at 4:30PM May 09, 2024Observed: 2.01 ft at 4:45PM May 09, 2024Observed: 2.02 ft at 5:00PM May 09, 2024Observed: 2.01 ft at 5:15PM May 09, 2024Observed: 2.01 ft at 5:30PM May 09, 2024Observed: 2.01 ft at 5:45PM May 09, 2024Observed: 2.01 ft at 6:00PM May 09, 2024Observed: 2.01 ft at 6:15PM May 09, 2024Observed: 2.01 ft at 6:30PM May 09, 2024Observed: 2.01 ft at 6:45PM May 09, 2024Observed: 2.01 ft at 7:00PM May 09, 2024Observed: 2.01 ft at 7:15PM May 09, 2024Observed: 2.01 ft at 7:30PM May 09, 2024Observed: 2 ft at 7:45PM May 09, 2024Observed: 2 ft at 8:00PM May 09, 2024Observed: 2.01 ft at 8:15PM May 09, 2024Observed: 2.01 ft at 8:30PM May 09, 2024Observed: 2 ft at 8:45PM May 09, 2024Observed: 2 ft at 9:00PM May 09, 2024Observed: 2 ft at 9:15PM May 09, 2024Observed: 2 ft at 9:30PM May 09, 2024Observed: 2 ft at 9:45PM May 09, 2024Observed: 2.01 ft at 10:00PM May 09, 2024Observed: 2.01 ft at 10:15PM May 09, 2024Observed: 2 ft at 10:30PM May 09, 2024Observed: 2 ft at 10:45PM May 09, 2024Observed: 2 ft at 11:00PM May 09, 2024Observed: 2 ft at 11:15PM May 09, 2024Observed: 2 ft at 11:30PM May 09, 2024Observed: 2 ft at 11:45PM May 09, 2024Observed: 2 ft at 12:00AM May 10, 2024Observed: 2.01 ft at 12:15AM May 10, 2024Observed: 2.01 ft at 12:30AM May 10, 2024Observed: 2.02 ft at 12:45AM May 10, 2024Observed: 2.02 ft at 1:00AM May 10, 2024Observed: 2.03 ft at 1:15AM May 10, 2024Observed: 2.03 ft at 1:30AM May 10, 2024Observed: 2.03 ft at 1:45AM May 10, 2024Observed: 2.04 ft at 2:00AM May 10, 2024Observed: 2.05 ft at 2:15AM May 10, 2024Observed: 2.06 ft at 2:30AM May 10, 2024Observed: 2.08 ft at 2:45AM May 10, 2024Observed: 2.09 ft at 3:00AM May 10, 2024Observed: 2.11 ft at 3:15AM May 10, 2024Observed: 2.13 ft at 3:30AM May 10, 2024Observed: 2.14 ft at 3:45AM May 10, 2024Observed: 2.14 ft at 4:00AM May 10, 2024Observed: 2.15 ft at 4:15AM May 10, 2024Observed: 2.15 ft at 4:30AM May 10, 2024Observed: 2.15 ft at 4:45AM May 10, 2024Observed: 2.15 ft at 5:00AM May 10, 2024Observed: 2.15 ft at 5:15AM May 10, 2024Observed: 2.15 ft at 5:30AM May 10, 2024Observed: 2.15 ft at 5:45AM May 10, 2024Observed: 2.14 ft at 6:00AM May 10, 2024Observed: 2.14 ft at 6:15AM May 10, 2024Observed: 2.14 ft at 6:30AM May 10, 2024Observed: 2.13 ft at 6:45AM May 10, 2024Observed: 2.12 ft at 7:00AM May 10, 2024Observed: 2.12 ft at 7:15AM May 10, 2024Observed: 2.11 ft at 7:30AM May 10, 2024Observed: 2.1 ft at 7:45AM May 10, 2024Observed: 2.11 ft at 8:00AM May 10, 2024Observed: 2.1 ft at 8:15AM May 10, 2024Observed: 2.11 ft at 8:30AM May 10, 2024Observed: 2.11 ft at 8:45AM May 10, 2024Observed: 2.12 ft at 9:00AM May 10, 2024Observed: 2.12 ft at 9:15AM May 10, 2024Observed: 2.12 ft at 9:30AM May 10, 2024Observed: 2.12 ft at 9:45AM May 10, 2024Observed: 2.13 ft at 10:00AM May 10, 2024Observed: 2.12 ft at 10:15AM May 10, 2024Observed: 2.13 ft at 10:30AM May 10, 2024Observed: 2.13 ft at 10:45AM May 10, 2024Observed: 2.13 ft at 11:00AM May 10, 2024Observed: 2.14 ft at 11:15AM May 10, 2024Observed: 2.15 ft at 11:30AM May 10, 2024Observed: 2.15 ft at 11:45AM May 10, 2024Observed: 2.16 ft at 12:00PM May 10, 2024Observed: 2.17 ft at 12:15PM May 10, 2024Observed: 2.18 ft at 12:30PM May 10, 2024Observed: 2.19 ft at 12:45PM May 10, 2024Observed: 2.2 ft at 1:00PM May 10, 2024Observed: 2.22 ft at 1:15PM May 10, 2024Observed: 2.24 ft at 1:30PM May 10, 2024Observed: 2.26 ft at 1:45PM May 10, 2024Observed: 2.27 ft at 2:00PM May 10, 2024Observed: 2.28 ft at 2:15PM May 10, 2024Highest Observation: 2.29 ft at 2:30PM May 10, 2024Forecast: 2.5 ft 8:00PM May 10, 2024Highest Forecast: 2.7 ft 2:00AM May 11, 2024Highest Forecast: 2.7 ft 8:00AM May 11, 2024Forecast: 2.6 ft 2:00PM May 11, 2024Forecast: 2.5 ft 8:00PM May 11, 2024Forecast: 2.4 ft 2:00AM May 12, 2024Forecast: 2.4 ft 8:00AM May 12, 2024Forecast: 2.6 ft 2:00PM May 12, 2024Highest Forecast: 2.7 ft 8:00PM May 12, 2024Highest Forecast: 2.7 ft 2:00AM May 13, 2024Forecast: 2.6 ft 8:00AM May 13, 2024USGS--Water Resources of the United StatesBETP1(plotting HGIRG) Graph Created (3:33PM May 10, 2024)ObservedForecast (issued 10:33AM May 10)Latest observed value: 2.29 ft at 2:30 PM EDT 10-May-2024. Flood Stage is 16 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts for the Lehigh River at Bethlehem are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Walnutport Upstream Gauge Downstream Gauge Downstream Gauge - at Glendon
Flood Categories (in feet)
Major Flood Stage: 22
Moderate Flood Stage: 20
Flood Stage: 16
Action Stage: 12
Low Stage (in feet): 0

Historic Crests
(1) 25.90 ft on 05/23/1942
(2) 24.90 ft on 02/28/1902
(3) 23.38 ft on 08/19/1955
(4) 20.02 ft on 06/23/1972
(5) 19.70 ft on 09/18/2004
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 19.53 ft on 09/02/2021
(2) 11.45 ft on 09/09/2011
(3) 11.91 ft on 08/28/2011
(4) 17.17 ft on 03/11/2011
(5) 17.74 ft on 06/28/2006
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.60 ft on 10/15/1910

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
25 Levees in the Bethleham area are topped. Major flooding begins.
16 Wilson Avenue takes on water.
15.5 Sand Island Recreational Area in Bethlehem is flooded.
15 The islands in the Allentown area begin to flood.
14 Flooding begins upstream in Allentown. Backwater begins to effect the Little Lehigh and Jordan creeks.
About This Location Collapse

Latitude: 40.615278° N, Longitude: 75.379167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 16 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 29 210.94 ft 226.94 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.
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
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