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Hydrograph River at a Glance Download Inundation
Mapping
Susquehanna River at Sunbury Stage (ft)Flow (kcfs)Observed: 10.77 ft at 12:30AM May 20, 2024Observed: 10.77 ft at 12:45AM May 20, 2024Observed: 10.77 ft at 1:00AM May 20, 2024Observed: 10.78 ft at 1:15AM May 20, 2024Observed: 10.79 ft at 1:30AM May 20, 2024Observed: 10.81 ft at 1:45AM May 20, 2024Observed: 10.81 ft at 2:00AM May 20, 2024Observed: 10.81 ft at 2:15AM May 20, 2024Observed: 10.81 ft at 2:30AM May 20, 2024Observed: 10.79 ft at 2:45AM May 20, 2024Observed: 10.79 ft at 3:00AM May 20, 2024Observed: 10.8 ft at 3:15AM May 20, 2024Observed: 10.81 ft at 3:30AM May 20, 2024Observed: 10.81 ft at 3:45AM May 20, 2024Observed: 10.81 ft at 4:00AM May 20, 2024Observed: 10.8 ft at 4:15AM May 20, 2024Observed: 10.8 ft at 4:30AM May 20, 2024Observed: 10.8 ft at 4:45AM May 20, 2024Observed: 10.81 ft at 5:00AM May 20, 2024Observed: 10.81 ft at 5:15AM May 20, 2024Observed: 10.82 ft at 5:30AM May 20, 2024Observed: 10.82 ft at 5:31AM May 20, 2024Highest Observation: 10.83 ft at 5:45AM May 20, 2024Observed: 10.81 ft at 6:00AM May 20, 2024Observed: 10.8 ft at 6:15AM May 20, 2024Observed: 10.81 ft at 6:30AM May 20, 2024Observed: 10.81 ft at 6:45AM May 20, 2024Observed: 10.81 ft at 7:00AM May 20, 2024Observed: 10.79 ft at 7:15AM May 20, 2024Observed: 10.79 ft at 7:30AM May 20, 2024Observed: 10.79 ft at 7:45AM May 20, 2024Observed: 10.78 ft at 8:00AM May 20, 2024Observed: 10.76 ft at 8:15AM May 20, 2024Observed: 10.76 ft at 8:30AM May 20, 2024Observed: 10.76 ft at 8:45AM May 20, 2024Observed: 10.75 ft at 9:00AM May 20, 2024Observed: 10.71 ft at 9:15AM May 20, 2024Observed: 10.7 ft at 9:30AM May 20, 2024Observed: 10.7 ft at 9:45AM May 20, 2024Observed: 10.7 ft at 10:00AM May 20, 2024Observed: 10.71 ft at 10:15AM May 20, 2024Observed: 10.72 ft at 10:30AM May 20, 2024Observed: 10.72 ft at 10:45AM May 20, 2024Observed: 10.73 ft at 11:00AM May 20, 2024Observed: 10.71 ft at 11:15AM May 20, 2024Observed: 10.7 ft at 11:30AM May 20, 2024Observed: 10.71 ft at 11:45AM May 20, 2024Observed: 10.71 ft at 12:00PM May 20, 2024Observed: 10.71 ft at 12:15PM May 20, 2024Observed: 10.71 ft at 12:30PM May 20, 2024Observed: 10.71 ft at 12:45PM May 20, 2024Observed: 10.68 ft at 1:00PM May 20, 2024Observed: 10.67 ft at 1:15PM May 20, 2024Observed: 10.66 ft at 1:30PM May 20, 2024Observed: 10.66 ft at 1:45PM May 20, 2024Observed: 10.66 ft at 2:00PM May 20, 2024Observed: 10.66 ft at 2:15PM May 20, 2024Observed: 10.67 ft at 2:30PM May 20, 2024Observed: 10.66 ft at 2:45PM May 20, 2024Observed: 10.63 ft at 3:00PM May 20, 2024Observed: 10.6 ft at 3:15PM May 20, 2024Observed: 10.57 ft at 3:30PM May 20, 2024Observed: 10.56 ft at 3:45PM May 20, 2024Observed: 10.55 ft at 4:00PM May 20, 2024Observed: 10.55 ft at 4:15PM May 20, 2024Observed: 10.56 ft at 4:30PM May 20, 2024Observed: 10.56 ft at 4:45PM May 20, 2024Observed: 10.56 ft at 5:00PM May 20, 2024Observed: 10.57 ft at 5:15PM May 20, 2024Observed: 10.57 ft at 5:30PM May 20, 2024Observed: 10.57 ft at 5:45PM May 20, 2024Observed: 10.56 ft at 6:00PM May 20, 2024Observed: 10.55 ft at 6:15PM May 20, 2024Observed: 10.55 ft at 6:30PM May 20, 2024Observed: 10.55 ft at 6:45PM May 20, 2024Observed: 10.56 ft at 7:00PM May 20, 2024Observed: 10.56 ft at 7:15PM May 20, 2024Observed: 10.56 ft at 7:30PM May 20, 2024Observed: 10.55 ft at 7:45PM May 20, 2024Observed: 10.51 ft at 8:00PM May 20, 2024Observed: 10.48 ft at 8:15PM May 20, 2024Observed: 10.47 ft at 8:30PM May 20, 2024Observed: 10.46 ft at 8:45PM May 20, 2024Observed: 10.46 ft at 9:00PM May 20, 2024Observed: 10.47 ft at 9:15PM May 20, 2024Observed: 10.47 ft at 9:30PM May 20, 2024Observed: 10.47 ft at 9:45PM May 20, 2024Observed: 10.48 ft at 10:00PM May 20, 2024Observed: 10.47 ft at 10:15PM May 20, 2024Observed: 10.46 ft at 10:30PM May 20, 2024Observed: 10.45 ft at 10:45PM May 20, 2024Observed: 10.45 ft at 11:00PM May 20, 2024Observed: 10.45 ft at 11:15PM May 20, 2024Observed: 10.43 ft at 11:30PM May 20, 2024Observed: 10.41 ft at 11:45PM May 20, 2024Observed: 10.4 ft at 12:00AM May 21, 2024Observed: 10.39 ft at 12:15AM May 21, 2024Observed: 10.39 ft at 12:30AM May 21, 2024Observed: 10.4 ft at 12:45AM May 21, 2024Observed: 10.4 ft at 1:00AM May 21, 2024Observed: 10.4 ft at 1:15AM May 21, 2024Observed: 10.41 ft at 1:30AM May 21, 2024Observed: 10.38 ft at 1:45AM May 21, 2024Observed: 10.36 ft at 2:00AM May 21, 2024Observed: 10.36 ft at 2:15AM May 21, 2024Observed: 10.36 ft at 2:30AM May 21, 2024Observed: 10.36 ft at 2:45AM May 21, 2024Observed: 10.35 ft at 3:00AM May 21, 2024Observed: 10.35 ft at 3:15AM May 21, 2024Observed: 10.33 ft at 3:30AM May 21, 2024Observed: 10.32 ft at 3:45AM May 21, 2024Observed: 10.32 ft at 4:00AM May 21, 2024Observed: 10.32 ft at 4:15AM May 21, 2024Observed: 10.31 ft at 4:30AM May 21, 2024Observed: 10.31 ft at 4:45AM May 21, 2024Observed: 10.31 ft at 5:00AM May 21, 2024Observed: 10.3 ft at 5:15AM May 21, 2024Observed: 10.3 ft at 5:30AM May 21, 2024Observed: 10.3 ft at 5:32AM May 21, 2024Observed: 10.3 ft at 5:45AM May 21, 2024Observed: 10.3 ft at 6:00AM May 21, 2024Observed: 10.3 ft at 6:15AM May 21, 2024Observed: 10.29 ft at 6:30AM May 21, 2024Observed: 10.29 ft at 6:45AM May 21, 2024Observed: 10.29 ft at 7:00AM May 21, 2024Observed: 10.28 ft at 7:15AM May 21, 2024Observed: 10.27 ft at 7:30AM May 21, 2024Observed: 10.24 ft at 7:45AM May 21, 2024Observed: 10.23 ft at 8:00AM May 21, 2024Observed: 10.23 ft at 8:15AM May 21, 2024Observed: 10.23 ft at 8:30AM May 21, 2024Observed: 10.22 ft at 8:45AM May 21, 2024Observed: 10.22 ft at 9:00AM May 21, 2024Observed: 10.22 ft at 9:15AM May 21, 2024Observed: 10.22 ft at 9:30AM May 21, 2024Observed: 10.22 ft at 9:45AM May 21, 2024Observed: 10.22 ft at 10:00AM May 21, 2024Observed: 10.22 ft at 10:15AM May 21, 2024Observed: 10.21 ft at 10:30AM May 21, 2024Observed: 10.21 ft at 10:45AM May 21, 2024Observed: 10.21 ft at 11:00AM May 21, 2024Observed: 10.21 ft at 11:15AM May 21, 2024Observed: 10.21 ft at 11:30AM May 21, 2024Observed: 10.21 ft at 11:45AM May 21, 2024Observed: 10.2 ft at 12:00PM May 21, 2024Observed: 10.19 ft at 12:15PM May 21, 2024Observed: 10.18 ft at 12:30PM May 21, 2024Observed: 10.18 ft at 12:45PM May 21, 2024Observed: 10.17 ft at 1:00PM May 21, 2024Observed: 10.17 ft at 1:15PM May 21, 2024Observed: 10.16 ft at 1:30PM May 21, 2024Observed: 10.16 ft at 1:45PM May 21, 2024Observed: 10.16 ft at 2:00PM May 21, 2024Observed: 10.13 ft at 2:15PM May 21, 2024Observed: 10.1 ft at 2:30PM May 21, 2024Observed: 10.08 ft at 2:45PM May 21, 2024Observed: 10.07 ft at 3:00PM May 21, 2024Observed: 10.06 ft at 3:15PM May 21, 2024Observed: 10.07 ft at 3:30PM May 21, 2024Observed: 10.07 ft at 3:45PM May 21, 2024Observed: 10.06 ft at 4:00PM May 21, 2024Observed: 10.05 ft at 4:15PM May 21, 2024Observed: 10.06 ft at 4:30PM May 21, 2024Observed: 10.07 ft at 4:45PM May 21, 2024Observed: 10.07 ft at 5:00PM May 21, 2024Observed: 10.08 ft at 5:15PM May 21, 2024Observed: 10.09 ft at 5:30PM May 21, 2024Observed: 10.09 ft at 5:45PM May 21, 2024Observed: 10.09 ft at 6:00PM May 21, 2024Observed: 10.08 ft at 6:15PM May 21, 2024Observed: 10.07 ft at 6:30PM May 21, 2024Observed: 10.06 ft at 6:45PM May 21, 2024Observed: 10.05 ft at 7:00PM May 21, 2024Observed: 10.05 ft at 7:15PM May 21, 2024Observed: 10.05 ft at 7:30PM May 21, 2024Observed: 10.04 ft at 7:45PM May 21, 2024Observed: 10.03 ft at 8:00PM May 21, 2024Observed: 10.04 ft at 8:15PM May 21, 2024Observed: 10.04 ft at 8:30PM May 21, 2024Observed: 10.05 ft at 8:45PM May 21, 2024Observed: 10.05 ft at 9:00PM May 21, 2024Observed: 10.06 ft at 9:15PM May 21, 2024Observed: 10.04 ft at 9:30PM May 21, 2024Observed: 10.04 ft at 9:45PM May 21, 2024Observed: 10.04 ft at 10:00PM May 21, 2024Observed: 10.04 ft at 10:15PM May 21, 2024Observed: 10.04 ft at 10:30PM May 21, 2024Observed: 10.04 ft at 10:45PM May 21, 2024Observed: 10.03 ft at 11:00PM May 21, 2024Observed: 10.02 ft at 11:15PM May 21, 2024Observed: 10.02 ft at 11:30PM May 21, 2024Observed: 10.01 ft at 11:45PM May 21, 2024Observed: 9.99 ft at 12:00AM May 22, 2024Observed: 9.98 ft at 12:15AM May 22, 2024Observed: 9.98 ft at 12:30AM May 22, 2024Observed: 9.98 ft at 12:45AM May 22, 2024Observed: 9.98 ft at 1:00AM May 22, 2024Observed: 9.97 ft at 1:15AM May 22, 2024Observed: 9.97 ft at 1:30AM May 22, 2024Observed: 9.97 ft at 1:45AM May 22, 2024Observed: 9.98 ft at 2:00AM May 22, 2024Observed: 9.97 ft at 2:15AM May 22, 2024Observed: 9.96 ft at 2:30AM May 22, 2024Observed: 9.97 ft at 2:45AM May 22, 2024Observed: 9.97 ft at 3:00AM May 22, 2024Observed: 9.96 ft at 3:15AM May 22, 2024Observed: 9.96 ft at 3:30AM May 22, 2024Observed: 9.95 ft at 3:45AM May 22, 2024Observed: 9.94 ft at 4:00AM May 22, 2024Observed: 9.93 ft at 4:15AM May 22, 2024Observed: 9.91 ft at 4:30AM May 22, 2024Observed: 9.89 ft at 4:45AM May 22, 2024Observed: 9.88 ft at 5:00AM May 22, 2024Observed: 9.88 ft at 5:15AM May 22, 2024Observed: 9.88 ft at 5:30AM May 22, 2024Observed: 9.88 ft at 5:31AM May 22, 2024Observed: 9.88 ft at 5:45AM May 22, 2024Observed: 9.88 ft at 6:00AM May 22, 2024Observed: 9.88 ft at 6:15AM May 22, 2024Observed: 9.88 ft at 6:30AM May 22, 2024Observed: 9.88 ft at 6:45AM May 22, 2024Observed: 9.88 ft at 7:00AM May 22, 2024Observed: 9.88 ft at 7:15AM May 22, 2024Observed: 9.88 ft at 7:30AM May 22, 2024Observed: 9.88 ft at 7:45AM May 22, 2024Observed: 9.88 ft at 8:00AM May 22, 2024Observed: 9.88 ft at 8:15AM May 22, 2024Observed: 9.88 ft at 8:30AM May 22, 2024Observed: 9.88 ft at 8:45AM May 22, 2024Observed: 9.87 ft at 9:00AM May 22, 2024Observed: 9.86 ft at 9:15AM May 22, 2024Observed: 9.84 ft at 9:30AM May 22, 2024Observed: 9.83 ft at 9:45AM May 22, 2024Observed: 9.82 ft at 10:00AM May 22, 2024Observed: 9.81 ft at 10:15AM May 22, 2024Observed: 9.81 ft at 10:30AM May 22, 2024Observed: 9.81 ft at 10:45AM May 22, 2024Observed: 9.81 ft at 11:00AM May 22, 2024Observed: 9.81 ft at 11:15AM May 22, 2024Observed: 9.82 ft at 11:30AM May 22, 2024Observed: 9.81 ft at 11:45AM May 22, 2024Observed: 9.81 ft at 12:00PM May 22, 2024Observed: 9.81 ft at 12:15PM May 22, 2024Observed: 9.8 ft at 12:30PM May 22, 2024Observed: 9.8 ft at 12:45PM May 22, 2024Observed: 9.79 ft at 1:00PM May 22, 2024Observed: 9.79 ft at 1:15PM May 22, 2024Observed: 9.78 ft at 1:30PM May 22, 2024Observed: 9.77 ft at 1:45PM May 22, 2024Observed: 9.77 ft at 2:00PM May 22, 2024Observed: 9.77 ft at 2:15PM May 22, 2024Observed: 9.75 ft at 2:30PM May 22, 2024Observed: 9.73 ft at 2:45PM May 22, 2024Observed: 9.72 ft at 3:00PM May 22, 2024Observed: 9.7 ft at 3:15PM May 22, 2024Observed: 9.7 ft at 3:30PM May 22, 2024Observed: 9.7 ft at 3:45PM May 22, 2024Observed: 9.69 ft at 4:00PM May 22, 2024Observed: 9.69 ft at 4:15PM May 22, 2024Observed: 9.7 ft at 4:30PM May 22, 2024Observed: 9.7 ft at 4:45PM May 22, 2024Observed: 9.71 ft at 5:00PM May 22, 2024Observed: 9.71 ft at 5:15PM May 22, 2024Observed: 9.72 ft at 5:30PM May 22, 2024Observed: 9.72 ft at 5:45PM May 22, 2024Observed: 9.71 ft at 6:00PM May 22, 2024Observed: 9.71 ft at 6:15PM May 22, 2024Observed: 9.71 ft at 6:30PM May 22, 2024Observed: 9.7 ft at 6:45PM May 22, 2024Observed: 9.7 ft at 7:00PM May 22, 2024Observed: 9.71 ft at 7:15PM May 22, 2024Observed: 9.72 ft at 7:30PM May 22, 2024Observed: 9.73 ft at 7:45PM May 22, 2024Observed: 9.74 ft at 8:00PM May 22, 2024Observed: 9.73 ft at 8:15PM May 22, 2024Observed: 9.73 ft at 8:30PM May 22, 2024Observed: 9.73 ft at 8:45PM May 22, 2024Observed: 9.72 ft at 9:00PM May 22, 2024Observed: 9.72 ft at 9:15PM May 22, 2024Observed: 9.73 ft at 9:30PM May 22, 2024Observed: 9.72 ft at 9:45PM May 22, 2024Observed: 9.73 ft at 10:00PM May 22, 2024Observed: 9.73 ft at 10:15PM May 22, 2024Observed: 9.73 ft at 10:30PM May 22, 2024Observed: 9.73 ft at 10:45PM May 22, 2024Observed: 9.73 ft at 11:00PM May 22, 2024Observed: 9.73 ft at 11:15PM May 22, 2024Observed: 9.73 ft at 11:30PM May 22, 2024Observed: 9.72 ft at 11:45PM May 22, 2024Forecast: 9.7 ft 2:00AM May 23, 2024Forecast: 9.7 ft 8:00AM May 23, 2024Forecast: 9.7 ft 2:00PM May 23, 2024Forecast: 9.8 ft 8:00PM May 23, 2024Forecast: 9.9 ft 2:00AM May 24, 2024Highest Forecast: 10 ft 8:00AM May 24, 2024Highest Forecast: 10 ft 2:00PM May 24, 2024Highest Forecast: 10 ft 8:00PM May 24, 2024Forecast: 9.9 ft 2:00AM May 25, 2024Forecast: 9.9 ft 8:00AM May 25, 2024Forecast: 9.8 ft 2:00PM May 25, 2024Forecast: 9.7 ft 8:00PM May 25, 2024USGS--Water Resources of the United StatesSBYP1(plotting HGIRG) Graph Created (12:18AM May 23, 2024)ObservedForecast (issued 9:22PM May 22)Latest observed value: 9.72 ft at 11:45 PM EDT 22-May-2024. Flood Stage is 24 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts for the Susquehanna River at Sunbury are issued routinely year-round.

The gage has been converted from NGVD29 to NAVD88 by the USGS. For additional information please visit: https://www.usgs.gov/centers/pennsylvania-water-science-center/updating-pennsylvania-streamgage-datums 

Return to Area Map
Upstream Gauge - at Danville Upstream Gauge Downstream Gauge Downstream Gauge - at Harrisburg
Flood Categories (in feet)
Major Flood Stage: 34
Moderate Flood Stage: 26
Flood Stage: 24
Action Stage: 20
Low Stage (in feet): 0

Historic Crests
(1) 35.80 ft on 06/24/1972
(2) 31.66 ft on 09/09/2011
(3) 30.62 ft on 09/27/1975
(4) 30.44 ft on 09/19/2004
(5) 30.32 ft on 01/20/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 21.17 ft on 09/12/2018
(2) 21.73 ft on 08/15/2018
(3) 22.16 ft on 07/26/2018
(4) 31.66 ft on 09/09/2011
(5) 25.58 ft on 04/29/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4.83 ft on 10/16/1971
(2) 5.16 ft on 08/06/1983
(3) 5.60 ft on 09/30/1980

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:13
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
35 Widespread catastrophic flooding occurs in areas outside the flood wall and levee system. This is the design height of the flood protection works anround Sunbury.
34 Most areas adjacent to the river, which are not protected by the flood wall and levee system, are affected by high water. Catasrophic flooding occurs in some of these areas.
32 Widespread flooding occurs in areas not protected by the flood wall and levee system. Many homes and businesses are affected.
30 Widespread flooding occurs in areas not protected by the flood wall and levee system. Many homes and businesses are affected.
28 Widespread flooding occurs in areas not protected by the flood wall and levee system. Many homes and businesses are affected.
26 High water affects a number of homes and businesses in areas not protected by the flood wall and levee system.
24 Both banks overflow. Areas not protected by the flood wall and levee system are affected.
22 River interests are encouraged to monitor conditions for further rises.
20 River interests are encouraged to monitor conditions for further rises. Shikellamy State Park closed due to high water.
Photos
(1) looking upstream
(2) view of the gagehouse
(3) looking downstream
About This Location Collapse

Latitude: 40.834444° N, Longitude: 76.826944° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 24 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 407.9 431.9 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 408.61 432.61 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) 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.
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
State College Weather Forecast Office
328 Innovation Boulevard, Suite 330
State College, PA 16803
(814) 954-6400
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