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Hydrograph River at a Glance Download
Allegheny River at Clinton Lock and Dam Pool (ft)Flow (kcfs)Observed: 9.67 ft at 8:00PM Sep 16, 2021Observed: 9.67 ft at 8:15PM Sep 16, 2021Observed: 9.67 ft at 8:30PM Sep 16, 2021Observed: 9.68 ft at 8:45PM Sep 16, 2021Observed: 9.68 ft at 9:00PM Sep 16, 2021Observed: 9.68 ft at 9:15PM Sep 16, 2021Observed: 9.68 ft at 9:30PM Sep 16, 2021Observed: 9.68 ft at 9:45PM Sep 16, 2021Observed: 9.69 ft at 10:00PM Sep 16, 2021Observed: 9.69 ft at 10:15PM Sep 16, 2021Observed: 9.69 ft at 10:30PM Sep 16, 2021Observed: 9.69 ft at 10:45PM Sep 16, 2021Observed: 9.69 ft at 11:00PM Sep 16, 2021Observed: 9.69 ft at 11:15PM Sep 16, 2021Observed: 9.69 ft at 11:30PM Sep 16, 2021Observed: 9.69 ft at 11:45PM Sep 16, 2021Observed: 9.7 ft at 12:00AM Sep 17, 2021Observed: 9.69 ft at 12:15AM Sep 17, 2021Observed: 9.71 ft at 12:30AM Sep 17, 2021Observed: 9.71 ft at 12:45AM Sep 17, 2021Observed: 9.71 ft at 1:00AM Sep 17, 2021Observed: 9.71 ft at 1:15AM Sep 17, 2021Observed: 9.71 ft at 1:30AM Sep 17, 2021Observed: 9.71 ft at 1:45AM Sep 17, 2021Observed: 9.71 ft at 2:00AM Sep 17, 2021Observed: 9.7 ft at 2:15AM Sep 17, 2021Observed: 9.72 ft at 2:30AM Sep 17, 2021Observed: 9.71 ft at 2:45AM Sep 17, 2021Observed: 9.7 ft at 3:00AM Sep 17, 2021Observed: 9.7 ft at 3:15AM Sep 17, 2021Observed: 9.72 ft at 3:30AM Sep 17, 2021Observed: 9.72 ft at 3:45AM Sep 17, 2021Observed: 9.72 ft at 4:00AM Sep 17, 2021Observed: 9.73 ft at 4:15AM Sep 17, 2021Observed: 9.73 ft at 4:30AM Sep 17, 2021Observed: 9.72 ft at 4:45AM Sep 17, 2021Observed: 9.73 ft at 5:00AM Sep 17, 2021Observed: 9.73 ft at 5:15AM Sep 17, 2021Observed: 9.72 ft at 5:30AM Sep 17, 2021Observed: 9.73 ft at 5:45AM Sep 17, 2021Observed: 9.73 ft at 6:00AM Sep 17, 2021Observed: 9.73 ft at 6:15AM Sep 17, 2021Observed: 9.72 ft at 6:30AM Sep 17, 2021Observed: 9.73 ft at 6:45AM Sep 17, 2021Observed: 9.72 ft at 7:00AM Sep 17, 2021Observed: 9.72 ft at 7:15AM Sep 17, 2021Observed: 9.72 ft at 7:30AM Sep 17, 2021Observed: 9.73 ft at 7:45AM Sep 17, 2021Observed: 9.73 ft at 8:00AM Sep 17, 2021Observed: 9.73 ft at 8:15AM Sep 17, 2021Observed: 9.73 ft at 8:30AM Sep 17, 2021Observed: 9.73 ft at 8:45AM Sep 17, 2021Observed: 9.73 ft at 9:00AM Sep 17, 2021Observed: 9.71 ft at 9:15AM Sep 17, 2021Observed: 9.74 ft at 9:30AM Sep 17, 2021Observed: 9.72 ft at 9:45AM Sep 17, 2021Observed: 9.73 ft at 10:00AM Sep 17, 2021Observed: 9.71 ft at 10:15AM Sep 17, 2021Observed: 9.71 ft at 10:30AM Sep 17, 2021Observed: 9.66 ft at 10:45AM Sep 17, 2021Observed: 9.67 ft at 11:00AM Sep 17, 2021Observed: 9.67 ft at 11:15AM Sep 17, 2021Observed: 9.69 ft at 11:30AM Sep 17, 2021Observed: 9.69 ft at 11:45AM Sep 17, 2021Observed: 9.7 ft at 12:00PM Sep 17, 2021Observed: 9.7 ft at 12:15PM Sep 17, 2021Observed: 9.68 ft at 12:30PM Sep 17, 2021Observed: 9.71 ft at 12:45PM Sep 17, 2021Observed: 9.69 ft at 1:00PM Sep 17, 2021Observed: 9.7 ft at 1:15PM Sep 17, 2021Observed: 9.72 ft at 1:30PM Sep 17, 2021Observed: 9.72 ft at 1:45PM Sep 17, 2021Observed: 9.7 ft at 2:00PM Sep 17, 2021Observed: 9.74 ft at 3:15PM Sep 17, 2021Observed: 9.72 ft at 3:30PM Sep 17, 2021Observed: 9.72 ft at 3:45PM Sep 17, 2021Observed: 9.72 ft at 4:00PM Sep 17, 2021Observed: 9.74 ft at 4:15PM Sep 17, 2021Observed: 9.72 ft at 4:30PM Sep 17, 2021Observed: 9.73 ft at 4:45PM Sep 17, 2021Observed: 9.72 ft at 5:00PM Sep 17, 2021Observed: 9.72 ft at 5:15PM Sep 17, 2021Observed: 9.69 ft at 5:30PM Sep 17, 2021Observed: 9.71 ft at 5:45PM Sep 17, 2021Observed: 9.69 ft at 6:00PM Sep 17, 2021Observed: 9.71 ft at 6:15PM Sep 17, 2021Observed: 9.69 ft at 6:30PM Sep 17, 2021Observed: 9.69 ft at 6:45PM Sep 17, 2021Observed: 9.69 ft at 7:00PM Sep 17, 2021Observed: 9.71 ft at 7:15PM Sep 17, 2021Observed: 9.7 ft at 7:30PM Sep 17, 2021Observed: 9.72 ft at 7:45PM Sep 17, 2021Observed: 9.71 ft at 8:00PM Sep 17, 2021Observed: 9.7 ft at 8:15PM Sep 17, 2021Observed: 9.71 ft at 8:30PM Sep 17, 2021Observed: 9.72 ft at 8:45PM Sep 17, 2021Observed: 9.71 ft at 9:00PM Sep 17, 2021Observed: 9.72 ft at 9:15PM Sep 17, 2021Observed: 9.72 ft at 9:30PM Sep 17, 2021Observed: 9.7 ft at 9:45PM Sep 17, 2021Observed: 9.72 ft at 10:00PM Sep 17, 2021Observed: 9.72 ft at 10:15PM Sep 17, 2021Observed: 9.72 ft at 10:30PM Sep 17, 2021Observed: 9.7 ft at 10:45PM Sep 17, 2021Observed: 9.7 ft at 11:00PM Sep 17, 2021Observed: 9.71 ft at 11:15PM Sep 17, 2021Observed: 9.72 ft at 11:30PM Sep 17, 2021Observed: 9.71 ft at 11:45PM Sep 17, 2021Observed: 9.72 ft at 12:00AM Sep 18, 2021Observed: 9.71 ft at 12:15AM Sep 18, 2021Observed: 9.72 ft at 12:30AM Sep 18, 2021Observed: 9.72 ft at 12:45AM Sep 18, 2021Observed: 9.72 ft at 1:00AM Sep 18, 2021Observed: 9.73 ft at 1:15AM Sep 18, 2021Observed: 9.71 ft at 1:30AM Sep 18, 2021Observed: 9.72 ft at 1:45AM Sep 18, 2021Observed: 9.72 ft at 2:00AM Sep 18, 2021Observed: 9.73 ft at 2:15AM Sep 18, 2021Observed: 9.72 ft at 2:30AM Sep 18, 2021Observed: 9.73 ft at 2:45AM Sep 18, 2021Observed: 9.72 ft at 3:00AM Sep 18, 2021Observed: 9.73 ft at 3:15AM Sep 18, 2021Observed: 9.74 ft at 3:30AM Sep 18, 2021Observed: 9.75 ft at 3:45AM Sep 18, 2021Observed: 9.76 ft at 4:00AM Sep 18, 2021Observed: 9.74 ft at 4:15AM Sep 18, 2021Observed: 9.74 ft at 4:30AM Sep 18, 2021Observed: 9.75 ft at 4:45AM Sep 18, 2021Observed: 9.77 ft at 5:00AM Sep 18, 2021Observed: 9.76 ft at 5:15AM Sep 18, 2021Observed: 9.77 ft at 5:30AM Sep 18, 2021Observed: 9.76 ft at 5:45AM Sep 18, 2021Observed: 9.78 ft at 6:00AM Sep 18, 2021Observed: 9.76 ft at 6:15AM Sep 18, 2021Observed: 9.77 ft at 6:30AM Sep 18, 2021Observed: 9.8 ft at 6:45AM Sep 18, 2021Observed: 9.81 ft at 7:00AM Sep 18, 2021Observed: 9.8 ft at 7:15AM Sep 18, 2021Observed: 9.8 ft at 7:30AM Sep 18, 2021Observed: 9.8 ft at 7:45AM Sep 18, 2021Observed: 9.81 ft at 8:00AM Sep 18, 2021Observed: 9.81 ft at 8:15AM Sep 18, 2021Observed: 9.8 ft at 8:30AM Sep 18, 2021Observed: 9.82 ft at 8:45AM Sep 18, 2021Observed: 9.82 ft at 9:00AM Sep 18, 2021Observed: 9.84 ft at 9:15AM Sep 18, 2021Observed: 9.82 ft at 9:30AM Sep 18, 2021Observed: 9.85 ft at 9:45AM Sep 18, 2021Observed: 9.84 ft at 10:00AM Sep 18, 2021Observed: 9.83 ft at 10:15AM Sep 18, 2021Observed: 9.84 ft at 10:30AM Sep 18, 2021Observed: 9.84 ft at 10:45AM Sep 18, 2021Observed: 9.85 ft at 11:00AM Sep 18, 2021Observed: 9.85 ft at 11:15AM Sep 18, 2021Observed: 9.86 ft at 11:30AM Sep 18, 2021Observed: 9.85 ft at 11:45AM Sep 18, 2021Observed: 9.85 ft at 12:00PM Sep 18, 2021Observed: 9.86 ft at 12:15PM Sep 18, 2021Observed: 9.87 ft at 12:30PM Sep 18, 2021Observed: 9.87 ft at 12:45PM Sep 18, 2021Observed: 9.87 ft at 1:00PM Sep 18, 2021Highest Observation: 9.88 ft at 1:15PM Sep 18, 2021Observed: 9.84 ft at 1:30PM Sep 18, 2021Observed: 9.85 ft at 1:45PM Sep 18, 2021Observed: 9.84 ft at 2:00PM Sep 18, 2021Observed: 9.87 ft at 2:15PM Sep 18, 2021Observed: 9.85 ft at 2:30PM Sep 18, 2021Observed: 9.84 ft at 2:45PM Sep 18, 2021Observed: 9.84 ft at 3:00PM Sep 18, 2021Observed: 9.86 ft at 3:15PM Sep 18, 2021Observed: 9.83 ft at 3:30PM Sep 18, 2021Observed: 9.81 ft at 3:45PM Sep 18, 2021Observed: 9.81 ft at 4:00PM Sep 18, 2021Observed: 9.8 ft at 4:15PM Sep 18, 2021Observed: 9.8 ft at 4:30PM Sep 18, 2021Observed: 9.79 ft at 4:45PM Sep 18, 2021Observed: 9.76 ft at 5:00PM Sep 18, 2021Observed: 9.78 ft at 5:15PM Sep 18, 2021Observed: 9.74 ft at 5:30PM Sep 18, 2021Observed: 9.73 ft at 5:45PM Sep 18, 2021Observed: 9.76 ft at 6:00PM Sep 18, 2021Observed: 9.76 ft at 6:15PM Sep 18, 2021Observed: 9.71 ft at 6:30PM Sep 18, 2021Observed: 9.74 ft at 6:45PM Sep 18, 2021Observed: 9.7 ft at 7:00PM Sep 18, 2021Observed: 9.71 ft at 7:15PM Sep 18, 2021Observed: 9.72 ft at 7:30PM Sep 18, 2021Observed: 9.7 ft at 7:45PM Sep 18, 2021Observed: 9.7 ft at 8:00PM Sep 18, 2021Observed: 9.7 ft at 8:15PM Sep 18, 2021Observed: 9.67 ft at 8:30PM Sep 18, 2021Observed: 9.7 ft at 8:45PM Sep 18, 2021Observed: 9.69 ft at 9:00PM Sep 18, 2021Observed: 9.68 ft at 9:15PM Sep 18, 2021Observed: 9.72 ft at 9:30PM Sep 18, 2021Observed: 9.7 ft at 9:45PM Sep 18, 2021Observed: 9.7 ft at 10:00PM Sep 18, 2021Observed: 9.71 ft at 10:15PM Sep 18, 2021Observed: 9.7 ft at 10:30PM Sep 18, 2021Observed: 9.71 ft at 10:45PM Sep 18, 2021Observed: 9.7 ft at 11:00PM Sep 18, 2021Observed: 9.69 ft at 11:15PM Sep 18, 2021Observed: 9.71 ft at 11:30PM Sep 18, 2021Observed: 9.71 ft at 11:45PM Sep 18, 2021Observed: 9.7 ft at 12:00AM Sep 19, 2021Observed: 9.7 ft at 12:15AM Sep 19, 2021Observed: 9.73 ft at 12:30AM Sep 19, 2021Observed: 9.71 ft at 12:45AM Sep 19, 2021Observed: 9.72 ft at 1:00AM Sep 19, 2021Observed: 9.72 ft at 1:15AM Sep 19, 2021Observed: 9.71 ft at 1:30AM Sep 19, 2021Observed: 9.73 ft at 1:45AM Sep 19, 2021Observed: 9.73 ft at 2:00AM Sep 19, 2021Observed: 9.72 ft at 2:15AM Sep 19, 2021Observed: 9.71 ft at 2:30AM Sep 19, 2021Observed: 9.72 ft at 2:45AM Sep 19, 2021Observed: 9.73 ft at 3:00AM Sep 19, 2021Observed: 9.73 ft at 3:15AM Sep 19, 2021Observed: 9.73 ft at 3:30AM Sep 19, 2021Observed: 9.73 ft at 3:45AM Sep 19, 2021Observed: 9.73 ft at 4:00AM Sep 19, 2021Observed: 9.74 ft at 4:15AM Sep 19, 2021Observed: 9.74 ft at 4:30AM Sep 19, 2021Observed: 9.72 ft at 4:45AM Sep 19, 2021Observed: 9.71 ft at 5:00AM Sep 19, 2021Observed: 9.71 ft at 5:15AM Sep 19, 2021Observed: 9.75 ft at 5:30AM Sep 19, 2021Observed: 9.72 ft at 5:45AM Sep 19, 2021Observed: 9.74 ft at 6:00AM Sep 19, 2021Observed: 9.74 ft at 6:15AM Sep 19, 2021Observed: 9.74 ft at 6:30AM Sep 19, 2021Observed: 9.74 ft at 6:45AM Sep 19, 2021Observed: 9.77 ft at 7:00AM Sep 19, 2021Observed: 9.77 ft at 7:15AM Sep 19, 2021Observed: 9.75 ft at 7:30AM Sep 19, 2021Observed: 9.75 ft at 7:45AM Sep 19, 2021Observed: 9.78 ft at 8:00AM Sep 19, 2021Observed: 9.79 ft at 8:15AM Sep 19, 2021Observed: 9.79 ft at 8:30AM Sep 19, 2021Observed: 9.77 ft at 8:45AM Sep 19, 2021Observed: 9.79 ft at 9:00AM Sep 19, 2021Observed: 9.8 ft at 9:15AM Sep 19, 2021Observed: 9.79 ft at 9:30AM Sep 19, 2021Observed: 9.81 ft at 9:45AM Sep 19, 2021Observed: 9.82 ft at 10:00AM Sep 19, 2021Observed: 9.79 ft at 10:15AM Sep 19, 2021Observed: 9.81 ft at 10:30AM Sep 19, 2021Observed: 9.82 ft at 10:45AM Sep 19, 2021Observed: 9.81 ft at 11:00AM Sep 19, 2021Observed: 9.83 ft at 11:15AM Sep 19, 2021Observed: 9.81 ft at 11:30AM Sep 19, 2021Observed: 9.83 ft at 11:45AM Sep 19, 2021Observed: 9.81 ft at 12:00PM Sep 19, 2021Observed: 9.82 ft at 12:15PM Sep 19, 2021Observed: 9.81 ft at 12:30PM Sep 19, 2021Observed: 9.81 ft at 12:45PM Sep 19, 2021Observed: 9.81 ft at 1:00PM Sep 19, 2021Observed: 9.81 ft at 1:15PM Sep 19, 2021Observed: 9.83 ft at 1:30PM Sep 19, 2021Observed: 9.78 ft at 1:45PM Sep 19, 2021Observed: 9.81 ft at 2:00PM Sep 19, 2021Observed: 9.79 ft at 2:15PM Sep 19, 2021Observed: 9.78 ft at 2:30PM Sep 19, 2021Observed: 9.78 ft at 2:45PM Sep 19, 2021Observed: 9.81 ft at 3:00PM Sep 19, 2021Observed: 9.8 ft at 3:15PM Sep 19, 2021Observed: 9.8 ft at 3:30PM Sep 19, 2021Observed: 9.75 ft at 3:45PM Sep 19, 2021Observed: 9.78 ft at 4:00PM Sep 19, 2021Observed: 9.73 ft at 4:15PM Sep 19, 2021Observed: 9.78 ft at 4:30PM Sep 19, 2021Observed: 9.75 ft at 4:45PM Sep 19, 2021Observed: 9.76 ft at 5:00PM Sep 19, 2021Observed: 9.75 ft at 5:15PM Sep 19, 2021Observed: 9.76 ft at 5:30PM Sep 19, 2021Observed: 9.77 ft at 5:45PM Sep 19, 2021Observed: 9.74 ft at 6:00PM Sep 19, 2021Observed: 9.74 ft at 6:15PM Sep 19, 2021Observed: 9.75 ft at 6:30PM Sep 19, 2021Observed: 9.73 ft at 6:45PM Sep 19, 2021Observed: 9.75 ft at 7:00PM Sep 19, 2021Highest Forecast: 9.7 ft 8:00PM Sep 19, 2021Highest Forecast: 9.7 ft 2:00AM Sep 20, 2021Highest Forecast: 9.7 ft 8:00AM Sep 20, 2021Highest Forecast: 9.7 ft 2:00PM Sep 20, 2021Highest Forecast: 9.7 ft 8:00PM Sep 20, 2021Highest Forecast: 9.7 ft 2:00AM Sep 21, 2021Highest Forecast: 9.7 ft 8:00AM Sep 21, 2021Highest Forecast: 9.7 ft 2:00PM Sep 21, 2021Highest Forecast: 9.7 ft 8:00PM Sep 21, 2021Highest Forecast: 9.7 ft 2:00AM Sep 22, 2021Highest Forecast: 9.7 ft 8:00AM Sep 22, 2021Highest Forecast: 9.7 ft 2:00PM Sep 22, 2021Highest Forecast: 9.7 ft 8:00PM Sep 22, 2021Highest Forecast: 9.7 ft 2:00AM Sep 23, 2021Highest Forecast: 9.7 ft 8:00AM Sep 23, 2021Highest Forecast: 9.7 ft 2:00PM Sep 23, 2021Highest Forecast: 9.7 ft 8:00PM Sep 23, 2021Highest Forecast: 9.7 ft 2:00AM Sep 24, 2021Highest Forecast: 9.7 ft 8:00AM Sep 24, 2021CLNP1(plotting HPIRG) Graph Created (7:47PM Sep 19, 2021)ObservedForecast (issued 9:57AM Sep 19)Latest observed value: 9.75 ft at 7:00 PM EDT 19-Sep-2021. Flood Stage is 21 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: The above river forecast includes future rainfall/snowmelt. Forecast stages may be different if the actual rainfall/snowmelt is different than the forecast rainfall/snowmelt.

NOTE: Forecasts for the Allegheny River at Clinton Lock and Dam are issued routinely year-round.

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Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - at Freeport Lock and Dam
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 22
Flood Stage: 21
Action Stage: 17
Low Stage (in feet): -9999

Historic Crests
(1) 26.40 ft on 03/18/1936
(2) 22.00 ft on 06/23/1972
(3) 20.30 ft on 09/18/2004
(4) 19.80 ft on 03/16/2007
(5) 19.20 ft on 12/31/1990
(6) 17.90 ft on 02/08/2019
(7) 16.20 ft on 03/23/2007

(P): Preliminary values subject to further review.

Recent Crests
(1) 17.90 ft on 02/08/2019
(2) 16.20 ft on 03/23/2007
(3) 19.80 ft on 03/16/2007
(4) 20.30 ft on 09/18/2004
(5) 19.20 ft on 12/31/1990
(6) 22.00 ft on 06/23/1972
(7) 26.40 ft on 03/18/1936

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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
26.4 Water reaches the bottom of the first floor window of the powerhouse at Lock 6.
23 Top of rail of the Pennsylvania Railroad across the river from the lock floods.
19 Lock walls overtopped.
17 Navigation suspended, lock out of service.
About This Location Collapse

Latitude: 40.716667° N, Longitude: 79.581111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 21 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 760.4 781.4 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.

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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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