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      West Branch Susquehanna River at Jersey Shore, PA (JRSP1)


      Data Type




      Inundation Levels
      NAVD88 Stage

      552.5*40.0*
      551.5*39.0*
      Record Crest: 38.2 ft
      550.538.0
      549.537.0
      548.536.0
      547.535.0
      546.534.0
      545.533.0
      544.532.0
      543.531.0
      542.530.0

      Major Flooding Begins

      541.529.0

      Moderate Flooding Begins

      540.528.0
      539.527.0

      Minor Flooding Begins

      538.526.0
      537.525.0
      536.524.0

      Near Flooding Begins

      535.523.0

      Below Flooding Begins

      * = Extended rating
      Weather Forecast Office State College, PA Middle Atlantic River Forecast Center
      Hydrograph River at a Glance Download Inundation
      Mapping
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      Click on mapped inundation to see water depth values for that location, or hold shift and drag to zoom to area.

      Current Stage:
      8.4 ft at 12/12/2019 17:15:00 UTC
      Selected Inundation
      Mouse Location

      North Arrow

      Inundation Legend
      Depth in feet
      USGS Gauge Location Gauge Location
      What is UTC time? Map Help

      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.

      Gauge Information Collapse

      Map Overlays

      Flood Categories (in feet)
      Major Flood Stage: 29
      Moderate Flood Stage: 28
      Flood Stage: 26
      Action Stage: 23
      Low Stage (in feet): 0

      Historic Crests
      (1) 38.20 ft on 06/23/1972
      (2) 37.90 ft on 03/19/1936
      (3) 37.30 ft on 06/01/1889
      (4) 32.80 ft on 11/25/1950
      (5) 30.74 ft on 09/18/2004
      Show More Historic Crests

      (P): Preliminary values subject to further review.

      Recent Crests
      (1) 30.74 ft on 09/18/2004
      (2) 29.50 ft on 01/20/1996
      (3) 23.00 ft on 04/02/1993
      (4) 27.00 ft on 02/15/1984
      (5) 25.50 ft on 03/06/1979
      Show More Recent Crests

      (P): Preliminary values subject to further review.

      Low Water Records
      Currently none available.

      Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

      Site-specific information:

      The scientific publication for these maps is available from the USGS at:  http://pubs.usgs.gov/sir/2010/5057/

      These maps represent unobstructed flow conditions and may be unrepresentative when ice jams and/or debris are in place.

      Extended rating:
      Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

      Flood Impacts Collapse
      If you notice any errors in the below information, please contact our Webmaster
      44 Approximate level of the FEMA 0.2% Annual Chance Flood level (500-year flood).
      38 Flood of record from Hurricane Agnes in 1972. Approximate level of the FEMA 1% Annual Chance Flood level (100-year flood). Flood waters begin to reach the Route 44 Bridge in Antes Fort.
      36.5 Approximate level of the FEMA 2% Annual Chance Flood level (50-year flood).
      32.5 Flood waters begin to reach the Route 44 Bridge in Jersey Shore.
      32 Most of Jersey Shore adjacent to the river is flooded.
      31.5 Approximate level of the FEMA 10% Annual Chance Flood level (10-year flood).
      29 Many homes and businesses in Jersey Shore are affected by high water.
      28 The left, or north bank overflows. Some homes adjacent to the river are flooded.
      26 The river overflows onto Log Island.
      23 Long Island (Route 44) and North Main Street in Jersey Shore may be closed to traffic.
      Other Data Sources Collapse
      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
      3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
      SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

      Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

      See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

      Click individual graphics to enlarge.

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      Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.