Advanced Hydrologic Prediction Service: State College: West Branch Susquehanna River at Williamsport

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Observations
courtesy of

Weather Forecast Office State College, PA	Middle Atlantic River Forecast Center
To see all current watches and warnings, click here.

Hydrograph

River at a Glance

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Weekly Chance of
Exceeding Levels

Chance of Exceeding Levels
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West Branch Susquehanna River at Williamsport

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Tabular Data

Datum: N/A

Metadata

NOTE: Forecasts for the West Branch Susquehanna River at Williamsport are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet)

Major Flood Stage:	30
Moderate Flood Stage:	21
Flood Stage:	20
Action Stage:	10

Historical Crests
(1) 34.75 ft on 06/23/1972
(2) 33.57 ft on 03/18/1936
(3) 32.40 ft on 06/01/1889
(4) 31.00 ft on 05/21/1884
(5) 29.60 ft on 05/28/1946
Show More Historical Crests

Low Water Records
(1) -0.7 ft on 09/03/1966
(1) -0.7 ft on 11/14/1964
(3) -0.6 ft on 09/17/1943
(4) -0.3 ft on 10/24/1981
(4) -0.3 ft on 09/08/1971

West Branch Susquehanna River at Williamsport location map

Flood Impacts & Photos

34.0	Widespread flooding occurs in areas not protected by the levee system.
32.0	Widespread flooding occurs in areas not protected by the levee system. The protective works for Route 220 are closed at this level.
30.0	Many homes and businesses outside the levee system are affected by high water.
27.0	A number of homes in areas not protected by the levee system are affected by high water.
25.0	A number of homes in areas not protected by the levee system are affected by high water.
23.0	Low lying areas on both banks are inundated. A number of homes and businesses in areas not protected by the levee system are affected.
21.0	A number of residences and roads in the area outside the levee system are affected.
20.0	High water affects a few homes and some roadways in areas not protected by the levee system. The camping area west of Williamsport is significantly affected.

Photos
(1) looking upstream
(2) view of the gagehouse
(3) looking downstream

About This Location

Latitude: 41.236000° N, Longitude: 76.997000° W, Horizontal Datum: NAD83

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	20 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	N/A	N/A	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	495 ft	515 ft	Older USGS topographic maps, NGVD29 benchmarks
MSL	N/A	N/A	Older USGS topographic maps, MSL benchmarks
Other	N/A	N/A

Other Data Sources:
U.S. Geological Survey (USGS) Data and Site Info for Williamsport

Resources

Hydrologic Resources

Additional Resources

Collaborative Agencies

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) 231-2408
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Page last modified: 29-Jun-2009 10:11 PM

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