Skip Navigation Link  
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
Navigation Bar End Cap


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
Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey
About this graph
Forecasts for the West Branch Susquehanna River at Lewisburg are issued routinely year-round.
Return to Area Map

Upstream Gauge - at West Milton Upstream Gauge
Zoom Level:13
Flood Categories (in feet)
Major Flood Stage: 28
Moderate Flood Stage: 23
Flood Stage: 18
Action Stage: 14
Low Stage (in feet): 0

Historic Crests
(1) 34.23 ft on 06/24/1972
(2) 32.10 ft on 03/19/1936
(3) 29.80 ft on 06/01/1889
(4) 28.50 ft on 05/21/1894
(5) 28.43 ft on 05/29/1946
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 19.35 ft on 09/12/2018
(2) 25.91 ft on 09/08/2011
(3) 20.13 ft on 04/29/2011
(4) 20.78 ft on 03/12/2011
(5) 20.90 ft on 12/02/2010
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.57 ft on 11/16/1964
(2) 0.65 ft on 09/14/1983
(3) 0.90 ft on 08/22/1988
(4) 0.98 ft on 09/15/1980
(5) 0.99 ft on 10/06/1983
Show More Low Water Records
KML Image
Gauge LocationGauge Map Marker
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
40 Approximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
34.2 Flood of record from Hurricane Agnes in 1972.
32.5 Approximate level of the FEMA 1% Annual Chance Flood level (100-year flood).
32 Flood waters begin to reach the Market Street Bridge. The intersection of 4th and Catherine Streets is inundated. A significant portion of Lewisburg is inundated.
30 Approximate level of the FEMA 2% Annual Chance Flood level (50-year flood).
28 The right, or west bank overflows and affects Lewisburg. Widespread inundation on the left bank affects several mobile home parks. Many residences and businesses on both banks are affected by flood waters.
25.5 Approximate level of the FEMA 10% Annual Chance Flood level (10-year flood).
25 Low lying areas on the right, or west bank are affected. The left bank continues to experience inundation.
23 The mobile home park along Route 405 downstream of the bridge will flood.
21 The left, or east bank experiences substantial overflow.
19 Route 405 is affected downstream of the Lewisburg Bridge.
18 The left, or east bank overflows. Low lying areas will flood.
(1) Downstream
(2) Downstream
(3) Upstream
(4) Upstream
(5) gagehouse

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) 7 Day (NAEFS) 7 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.

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
State College Weather Forecast Office
328 Innovation Boulevard, Suite 330
State College, PA 16803
(814) 954-6400
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:30 PM
Privacy Policy
About Us
Career Opportunities