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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Susquehanna River at Unadilla Observed crest: 4.67 ft at 9:45am Nov 21 Observed: 4.67 ft at 9:45am Nov 21 Observed: 4.62 ft at 12:00pm Nov 21 Observed: 4.53 ft at 3:45pm Nov 21 Observed: 4.48 ft at 6:00pm Nov 21 Observed: 4.4 ft at 9:45pm Nov 21 Observed: 4.36 ft at 12:00am Nov 22 Observed: 4.29 ft at 3:45am Nov 22 Observed: 4.26 ft at 6:00am Nov 22 Observed: 4.22 ft at 9:45am Nov 22 Observed: 4.19 ft at 12:00pm Nov 22 Observed: 4.16 ft at 3:45pm Nov 22 Observed: 4.14 ft at 6:00pm Nov 22 Observed: 4.1 ft at 9:45pm Nov 22 Observed: 4.08 ft at 12:00am Nov 23 Observed: 4.06 ft at 3:45am Nov 23 Observed: 4.05 ft at 6:00am Nov 23 Observed: 4.04 ft at 9:45am Nov 23 Observed: 4.03 ft at 12:00pm Nov 23 Observed: 4.01 ft at 3:45pm Nov 23 Observed: 4 ft at 6:00pm Nov 23 Observed: 3.99 ft at 9:45pm Nov 23 Observed: 3.98 ft at 12:00am Nov 24 Observed: 3.97 ft at 3:45am Nov 24 Observed: 3.97 ft at 6:00am Nov 24 Graph Created (6:46am Nov 24, 2009) Observed USGS--Water Resources of the United States UNDN6 (plotting HGIRP) Gage 0 Datum: 997.25 Latest observed value: 3.97 ft at 6:00 AM EST 24-Nov-2009. Flood Stage is 11.0 ft. Stage (ft) Flow (kcfs)
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NOTE: Forecasts for the Susquehanna River at Unadilla are issued as needed during times of high water, but are not routinely available.

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Downstream Gauge Downstream Gauge - at Bainbridge

Flood Categories (in feet)
Major Flood Stage:14.5
Moderate Flood Stage:13
Flood Stage:11
Action Stage:9

Historical Crests
(1) 17.72 ft on 06/29/2006
(2) 16.60 ft on 03/18/1936
(3) 14.64 ft on 03/14/1977
(4) 14.25 ft on 04/04/1960
(5) 14.24 ft on 01/19/1996
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Low Water Records
(1) 1.4 ft on 10/17/1964
(1) 1.4 ft on 09/25/1964
(3) 1.5 ft on 08/22/1966
(3) 1.5 ft on 08/30/1965
(3) 1.5 ft on 09/22/1959

 Susquehanna River at Unadilla location map

Flood Impacts & Photos Collapse
17.5 MAJOR FLOODING IN SIDNEY INCLUDING EAST AND WEST MAIN STREET AND RIVER STREET.
14.5 UNION STREET AND DIVISION STREET IN SIDNEY FLOODED. WATER BEGINS TO THREATEN BRIDGE STREET AND LIBERTY STREET IN SIDNEY.
14.0 FLOODING BEGINS ALONG MAPLE AVENUE IN SIDNEY.
11.0 LOWLAND FLOODING BEGINS FROM OVERFLOW ON THE OTSEGO COUNTY OR NORTH SIDE OF SUSQUEHANNA RIVER NEAR UNADILLA.
Photos
(1) looking upstream
(2) view of gagehouse
(3) looking downstream

About This Location Collapse
Latitude: 42.321700° N, Longitude: 75.316900° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 29 997.25 ft 1008.25 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 Unadilla

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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.

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Johnson City, NY 13790
(607) 729-1597
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