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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Monongahela River at Charleroi L&D Forecast crest: 10 ft at 1:00am Nov 26 Observed crest: 10.45 ft at 7:00am Nov 21 Observed: 10.17 ft at 8:00pm Nov 20 Observed: 10.11 ft at 9:00pm Nov 20 Observed: 10.19 ft at 10:00pm Nov 20 Observed: 10.17 ft at 11:00pm Nov 20 Observed: 10.25 ft at 12:00am Nov 21 Observed: 10.31 ft at 1:00am Nov 21 Observed: 10.29 ft at 2:00am Nov 21 Observed: 10.36 ft at 3:00am Nov 21 Observed: 10.37 ft at 4:00am Nov 21 Observed: 10.36 ft at 5:00am Nov 21 Observed: 10.36 ft at 6:00am Nov 21 Observed: 10.45 ft at 7:00am Nov 21 Observed: 10.36 ft at 8:00am Nov 21 Observed: 10.36 ft at 9:00am Nov 21 Observed: 10.34 ft at 10:00am Nov 21 Observed: 10.37 ft at 11:00am Nov 21 Observed: 10.31 ft at 12:00pm Nov 21 Observed: 10.31 ft at 1:00pm Nov 21 Observed: 10.34 ft at 2:00pm Nov 21 Observed: 10.37 ft at 3:00pm Nov 21 Observed: 10.39 ft at 4:00pm Nov 21 Observed: 10.34 ft at 5:00pm Nov 21 Observed: 10.23 ft at 6:00pm Nov 21 Observed: 10.22 ft at 7:00pm Nov 21 Observed: 10.19 ft at 8:00pm Nov 21 Observed: 10.11 ft at 9:00pm Nov 21 Observed: 10.08 ft at 10:00pm Nov 21 Observed: 10.06 ft at 11:00pm Nov 21 Observed: 10.02 ft at 12:00am Nov 22 Observed: 9.99 ft at 1:00am Nov 22 Observed: 9.97 ft at 2:00am Nov 22 Observed: 9.92 ft at 3:00am Nov 22 Observed: 9.97 ft at 4:00am Nov 22 Observed: 9.86 ft at 5:00am Nov 22 Observed: 9.85 ft at 6:00am Nov 22 Observed: 9.86 ft at 7:00am Nov 22 Observed: 9.79 ft at 8:00am Nov 22 Observed: 9.82 ft at 9:00am Nov 22 Observed: 9.79 ft at 10:00am Nov 22 Observed: 9.77 ft at 11:00am Nov 22 Observed: 9.79 ft at 12:00pm Nov 22 Observed: 9.74 ft at 1:00pm Nov 22 Observed: 9.77 ft at 2:00pm Nov 22 Observed: 9.76 ft at 3:00pm Nov 22 Observed: 9.82 ft at 4:00pm Nov 22 Observed: 9.72 ft at 5:00pm Nov 22 Observed: 9.74 ft at 6:00pm Nov 22 Observed: 9.76 ft at 7:00pm Nov 22 Observed: 9.72 ft at 8:00pm Nov 22 Observed: 9.72 ft at 9:00pm Nov 22 Observed: 9.77 ft at 10:00pm Nov 22 Observed: 9.76 ft at 11:00pm Nov 22 Observed: 9.82 ft at 12:00am Nov 23 Observed: 9.82 ft at 1:00am Nov 23 Observed: 9.77 ft at 2:00am Nov 23 Observed: 9.82 ft at 3:00am Nov 23 Observed: 9.74 ft at 4:00am Nov 23 Observed: 9.85 ft at 5:00am Nov 23 Observed: 9.79 ft at 6:00am Nov 23 Observed: 9.8 ft at 7:00am Nov 23 Observed: 9.82 ft at 8:00am Nov 23 Observed: 9.85 ft at 9:00am Nov 23 Observed: 9.85 ft at 10:00am Nov 23 Observed: 9.86 ft at 11:00am Nov 23 Observed: 9.88 ft at 12:00pm Nov 23 Observed: 9.79 ft at 1:00pm Nov 23 Observed: 9.8 ft at 2:00pm Nov 23 Observed: 9.77 ft at 3:00pm Nov 23 Forecast: 9.8 ft at 1:00pm Nov 23 Forecast: 9.8 ft at 7:00pm Nov 23 Forecast: 9.7 ft at 1:00am Nov 24 Forecast: 9.7 ft at 7:00am Nov 24 Forecast: 9.7 ft at 1:00pm Nov 24 Forecast: 9.8 ft at 7:00pm Nov 24 Forecast: 9.9 ft at 1:00am Nov 25 Forecast: 9.8 ft at 7:00am Nov 25 Forecast: 9.7 ft at 1:00pm Nov 25 Forecast: 9.8 ft at 7:00pm Nov 25 Forecast: 10 ft at 1:00am Nov 26 Forecast: 9.8 ft at 7:00am Nov 26 Forecast: 9.6 ft at 1:00pm Nov 26 Forecast: 9.8 ft at 7:00pm Nov 26 Forecast: 9.9 ft at 1:00am Nov 27 Forecast: 9.8 ft at 7:00am Nov 27 Forecast: 9.6 ft at 1:00pm Nov 27 Forecast: 9.7 ft at 7:00pm Nov 27 Forecast: 9.9 ft at 1:00am Nov 28 Forecast: 9.7 ft at 7:00am Nov 28 Graph Created (7:34pm Nov 23, 2009) Observed Forecast (issued 9:03am Nov 23) CHRP1 (plotting HTIRG) Gage 0 Datum: 717.90 Latest observed value: 9.77 ft at 3:00 PM EST 23-Nov-2009. Flood Stage is 28.0 ft. Tailwater (ft) Flow (kcfs)
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NOTE: The above river forecast includes future rainfall. Forecast stages may be different if the rainfall does not occur.

NOTE: Forecasts for the Monongahela River at Charleroi L&D are issued routinely year-round.

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Upstream Gauge - at Maxwell L&D Upstream Gauge Downstream Gauge Downstream Gauge - at Elizabeth L&D

Flood Categories (in feet)
Major Flood Stage:35
Moderate Flood Stage:31
Flood Stage:28
Action Stage:22.6

Historical Crests
(1) 42.70 ft on 11/05/1985
(2) 41.10 ft on 03/09/1967
(3) 39.90 ft on 03/18/1936
(4) 39.80 ft on 01/20/1996
(5) 39.40 ft on 03/05/1963
(6) 39.20 ft on 06/04/1941
(7) 38.50 ft on 02/19/2000
(8) 38.00 ft on 10/16/1954
(9) 37.20 ft on 08/06/1956
(10) 36.10 ft on 03/28/1963

Low Water Records
(1) 0.0 ft on 01/01/1980

 Monongahela River at Charleroi L&D location map

Flood Impacts Collapse
37.0 50 HOMES ARE FLOODED IN ROSCOE. FLOODING ALSO OCCURS IN THE TOWNS OF ELKO...ALLENPORT...AND STOCKDALE
36.0 SEVERAL HOMES ARE FLOODED ON LYNN STREET IN ROSCOE
35.0 BACKWATER FLOODING IN MONONGAHELA ALONG PIGEON CREEK CAUSES FLOOD WATERS UP TO 4.5 FEET IN BUSINESSES IN THE LOWEST BUILDING IN PENOS PLAZA AND UP TO 6 FEET IN ARMSTRONG PARK. BACKWATER FLOODING SPREADS UPSTREAM ALONG PIGEON CREEK TO THE ROUTE 43 OVERPASS ON PARK AVENUE.
34.1 DIVISION OF AMERICAN CHAIN AND CABLE CO. IN MONESSEN FLOODS.
33.0 FLOODING IS WIDSPREAD IN FAYETTE CITY
32.0 FLOODING OCCURS ON CONNELLSVILLE...FOURTH...COOK...AND MAIN STREETS IN FAYETTE CITY
31.6 Lock walls overtopped.
30.0 BACKWATER FLOODING ALONG PIGEON CREEK IN MONONGAHELA...BEGINS TO FLOOD the LOWEST BUILDING IN PENOS PLAZA...ARMSTRONG PARK...AND CLOSES WALL STREET BRIDGE ACROSS PIGEON CREEK.
29.0 Navigation suspended, lock out of service.
28.0 IN MONONGAHELA...BACKWATER FLOODING ALONG PIGEON CREEK BEGINS FROM THE INTERSECTION OF PARK WAY AND PARK AVENUE.
26.0 RT 201 IN CLOSED DUE TO FLOODING ALONG DONNER'S RUN

About This Location Collapse
Latitude: 40.149444° N, Longitude: 79.901666° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 28 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 29 717.900024414062 ft 745.900024414062 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:
Corps of Engineers (COE) Info for Charleroi L&D

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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
Pittsburgh Weather Forecast Office
192 Shafer Road
Moon Township, PA 15108
(412) 262-1591
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