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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Youghiogheny River at Confluence Observed crest: 2.94 ft at 1:00am Nov 21 Observed: 2.94 ft at 1:00am Nov 21 Observed: 2.93 ft at 2:00am Nov 21 Observed: 2.93 ft at 3:00am Nov 21 Observed: 2.92 ft at 4:00am Nov 21 Observed: 2.91 ft at 5:00am Nov 21 Observed: 2.9 ft at 6:00am Nov 21 Observed: 2.88 ft at 7:00am Nov 21 Observed: 2.88 ft at 8:00am Nov 21 Observed: 2.87 ft at 9:00am Nov 21 Observed: 2.76 ft at 10:00am Nov 21 Observed: 2.57 ft at 11:00am Nov 21 Observed: 2.54 ft at 12:00pm Nov 21 Observed: 2.53 ft at 1:00pm Nov 21 Observed: 2.53 ft at 2:00pm Nov 21 Observed: 2.52 ft at 3:00pm Nov 21 Observed: 2.52 ft at 4:00pm Nov 21 Observed: 2.51 ft at 5:00pm Nov 21 Observed: 2.5 ft at 6:00pm Nov 21 Observed: 2.49 ft at 7:00pm Nov 21 Observed: 2.48 ft at 8:00pm Nov 21 Observed: 2.48 ft at 9:00pm Nov 21 Observed: 2.47 ft at 10:00pm Nov 21 Observed: 2.46 ft at 11:00pm Nov 21 Observed: 2.46 ft at 12:00am Nov 22 Observed: 2.45 ft at 1:00am Nov 22 Observed: 2.45 ft at 2:00am Nov 22 Observed: 2.44 ft at 3:00am Nov 22 Observed: 2.44 ft at 4:00am Nov 22 Observed: 2.44 ft at 5:00am Nov 22 Observed: 2.43 ft at 6:00am Nov 22 Observed: 2.43 ft at 7:00am Nov 22 Observed: 2.42 ft at 8:00am Nov 22 Observed: 2.42 ft at 9:00am Nov 22 Observed: 2.42 ft at 10:00am Nov 22 Observed: 2.41 ft at 11:00am Nov 22 Observed: 2.41 ft at 12:00pm Nov 22 Observed: 2.41 ft at 1:00pm Nov 22 Observed: 2.41 ft at 2:00pm Nov 22 Observed: 2.4 ft at 3:00pm Nov 22 Observed: 2.4 ft at 4:00pm Nov 22 Observed: 2.4 ft at 5:00pm Nov 22 Observed: 2.39 ft at 6:00pm Nov 22 Observed: 2.39 ft at 7:00pm Nov 22 Observed: 2.39 ft at 8:00pm Nov 22 Observed: 2.38 ft at 9:00pm Nov 22 Observed: 2.38 ft at 10:00pm Nov 22 Observed: 2.38 ft at 11:00pm Nov 22 Observed: 2.37 ft at 12:00am Nov 23 Observed: 2.37 ft at 1:00am Nov 23 Observed: 2.37 ft at 2:00am Nov 23 Observed: 2.37 ft at 3:00am Nov 23 Observed: 2.36 ft at 4:00am Nov 23 Observed: 2.36 ft at 5:00am Nov 23 Observed: 2.36 ft at 6:00am Nov 23 Observed: 2.36 ft at 7:00am Nov 23 Observed: 2.36 ft at 8:00am Nov 23 Observed: 2.36 ft at 9:00am Nov 23 Observed: 2.4 ft at 10:00am Nov 23 Observed: 2.5 ft at 11:00am Nov 23 Observed: 2.51 ft at 12:00pm Nov 23 Observed: 2.51 ft at 1:00pm Nov 23 Observed: 2.51 ft at 2:00pm Nov 23 Observed: 2.51 ft at 3:00pm Nov 23 Observed: 2.51 ft at 4:00pm Nov 23 Observed: 2.51 ft at 5:00pm Nov 23 Observed: 2.5 ft at 6:00pm Nov 23 Observed: 2.5 ft at 7:00pm Nov 23 Observed: 2.5 ft at 8:00pm Nov 23 Observed: 2.5 ft at 9:00pm Nov 23 Observed: 2.5 ft at 10:00pm Nov 23 Observed: 2.5 ft at 11:00pm Nov 23 Graph Created (12:58am Nov 24, 2009) Observed USGS--Water Resources of the United States CNFP1 (plotting HGIRG) Gage 0 Datum: 1302.80 Latest observed value: 2.5 ft at 11:00 PM EST 23-Nov-2009. Flood Stage is 12.0 ft. Stage (ft) Flow (kcfs)
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NOTE: Forecasts for the Youghiogheny River at Confluence are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Youghiogheny Dam Tailwater Upstream Gauge Downstream Gauge Downstream Gauge - at Ohiopyle

Flood Categories (in feet)
Major Flood Stage:17
Moderate Flood Stage:14
Flood Stage:12
Action Stage:7

Historical Crests
(1) 21.60 ft on 03/17/1936
(2) 19.92 ft on 10/15/1954
(3) 17.62 ft on 01/19/1996
(4) 13.08 ft on 09/14/1971
(5) 12.37 ft on 03/06/1967
Show More Historical Crests

Low Water Records
(1) 0.3 ft on 10/14/1943
(2) 0.4 ft on 10/14/1963

 Youghiogheny River at Confluence location map

Flood Impacts Collapse
20.0 Over half of the town of Confluence would be affected by flood waters prior to the construction of the flood control structures.
18.0 Flood waters cover Route 281 just downstream of the bridge over the Youghiogheny.
16.0 Significant flooding is expected on the Youghiogheny River in the vicintiy of Confluence. Areas adjacent to the river which are not protected by flood control structures are inundated.
14.0 State Route 3003 is closed due to high water. High water covers the road about one tenth of a mile downstream of the confluence of the Casselman and Youghiogheny rivers.
12.0 The right bank of the river overflows downstream of Confluence and about 1/4 mile upstream from the gaging station.
7.0 The Youghiogheny Reservoir is expected to begin curtailing releases due to high water downstream of the dam. River interests are encouraged to monitor conditions in their vicinity and to be prepared if further rises occur.

About This Location Collapse
Latitude: 39.833300° N, Longitude: 79.366700° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 12 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 1302.8 ft 1314.8 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 Confluence

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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.

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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