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This probabilistic forecast is issued by the Middle Atlantic River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left on tab right on
About this graph
Forecasts for the Lehigh River at Walnutport are issued routinely year-round.
Return to Area Map

Upstream Gauge - at Lehighton Upstream Gauge Downstream Gauge Downstream Gauge - at Bethlehem
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 16
Moderate Flood Stage: 12
Flood Stage: 8
Action Stage: 7.5
Low Stage (in feet): 0

Historic Crests
(1) 20.60 ft on 05/23/1942
(2) 17.68 ft on 08/19/1955
(3) 13.19 ft on 09/02/2021
(4) 12.72 ft on 03/11/2011
(5) 12.66 ft on 12/04/1950
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 13.19 ft on 09/02/2021
(2) 9.18 ft on 08/23/2021
(3) 9.40 ft on 12/25/2020
(4) 8.80 ft on 09/09/2011
(5) 7.23 ft on 08/28/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
13 Flooding begins just downstream from the Slatington Walnutport Bridge.
6 Minor flooding begins downstream at Catasaqua and Hokendaqua.

Other Real-time and/or Archive Data Sources:
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.
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
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732 Woodlane Road
Mount Holly, NJ 08060-9615
(609) 261-6600
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