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Hydrograph River at a Glance Download
Allegheny River at Sharpsburg Lock and Dam Pool (ft)Flow (kcfs)Observed: 11.9 ft at 5:30AM Mar 25, 2024Observed: 11.89 ft at 5:45AM Mar 25, 2024Observed: 11.9 ft at 6:00AM Mar 25, 2024Observed: 11.9 ft at 6:15AM Mar 25, 2024Observed: 11.89 ft at 6:30AM Mar 25, 2024Observed: 11.88 ft at 6:45AM Mar 25, 2024Observed: 11.9 ft at 7:00AM Mar 25, 2024Observed: 11.88 ft at 7:15AM Mar 25, 2024Observed: 11.91 ft at 7:30AM Mar 25, 2024Observed: 11.9 ft at 7:45AM Mar 25, 2024Observed: 11.91 ft at 8:00AM Mar 25, 2024Observed: 11.88 ft at 8:15AM Mar 25, 2024Observed: 11.91 ft at 8:30AM Mar 25, 2024Observed: 11.91 ft at 8:45AM Mar 25, 2024Observed: 11.9 ft at 9:00AM Mar 25, 2024Observed: 11.89 ft at 9:15AM Mar 25, 2024Observed: 11.92 ft at 9:30AM Mar 25, 2024Observed: 11.91 ft at 9:45AM Mar 25, 2024Observed: 11.92 ft at 10:00AM Mar 25, 2024Observed: 11.93 ft at 10:15AM Mar 25, 2024Observed: 11.93 ft at 10:30AM Mar 25, 2024Observed: 11.92 ft at 10:45AM Mar 25, 2024Observed: 11.92 ft at 11:00AM Mar 25, 2024Observed: 11.95 ft at 11:15AM Mar 25, 2024Observed: 11.93 ft at 11:30AM Mar 25, 2024Observed: 11.94 ft at 11:45AM Mar 25, 2024Observed: 11.93 ft at 12:00PM Mar 25, 2024Observed: 11.92 ft at 12:15PM Mar 25, 2024Observed: 11.91 ft at 12:30PM Mar 25, 2024Observed: 11.93 ft at 12:45PM Mar 25, 2024Observed: 11.94 ft at 1:00PM Mar 25, 2024Observed: 11.92 ft at 1:15PM Mar 25, 2024Observed: 11.94 ft at 1:30PM Mar 25, 2024Observed: 11.91 ft at 1:45PM Mar 25, 2024Observed: 11.94 ft at 2:00PM Mar 25, 2024Observed: 11.93 ft at 2:15PM Mar 25, 2024Observed: 11.92 ft at 2:30PM Mar 25, 2024Observed: 11.91 ft at 2:45PM Mar 25, 2024Observed: 11.91 ft at 3:00PM Mar 25, 2024Observed: 11.92 ft at 3:15PM Mar 25, 2024Observed: 11.92 ft at 3:30PM Mar 25, 2024Observed: 11.92 ft at 3:45PM Mar 25, 2024Observed: 11.93 ft at 4:00PM Mar 25, 2024Observed: 11.9 ft at 4:15PM Mar 25, 2024Observed: 11.92 ft at 4:30PM Mar 25, 2024Observed: 11.92 ft at 4:45PM Mar 25, 2024Observed: 11.88 ft at 5:00PM Mar 25, 2024Observed: 11.87 ft at 5:15PM Mar 25, 2024Observed: 11.88 ft at 5:30PM Mar 25, 2024Observed: 11.9 ft at 5:45PM Mar 25, 2024Observed: 11.88 ft at 6:00PM Mar 25, 2024Observed: 11.87 ft at 6:15PM Mar 25, 2024Observed: 11.85 ft at 6:30PM Mar 25, 2024Observed: 11.86 ft at 6:45PM Mar 25, 2024Observed: 11.85 ft at 7:00PM Mar 25, 2024Observed: 11.83 ft at 7:15PM Mar 25, 2024Observed: 11.81 ft at 7:30PM Mar 25, 2024Observed: 11.82 ft at 7:45PM Mar 25, 2024Observed: 11.81 ft at 8:00PM Mar 25, 2024Observed: 11.77 ft at 8:15PM Mar 25, 2024Observed: 11.79 ft at 8:30PM Mar 25, 2024Observed: 11.78 ft at 8:45PM Mar 25, 2024Observed: 11.76 ft at 9:00PM Mar 25, 2024Observed: 11.77 ft at 9:15PM Mar 25, 2024Observed: 11.74 ft at 9:30PM Mar 25, 2024Observed: 11.73 ft at 9:45PM Mar 25, 2024Observed: 11.74 ft at 10:00PM Mar 25, 2024Observed: 11.71 ft at 10:15PM Mar 25, 2024Observed: 11.73 ft at 10:30PM Mar 25, 2024Observed: 11.7 ft at 10:45PM Mar 25, 2024Observed: 11.73 ft at 11:00PM Mar 25, 2024Observed: 11.73 ft at 11:15PM Mar 25, 2024Observed: 11.72 ft at 11:30PM Mar 25, 2024Observed: 11.72 ft at 11:45PM Mar 25, 2024Observed: 11.72 ft at 12:00AM Mar 26, 2024Observed: 11.73 ft at 12:15AM Mar 26, 2024Observed: 11.7 ft at 12:30AM Mar 26, 2024Observed: 11.69 ft at 12:45AM Mar 26, 2024Observed: 11.71 ft at 1:00AM Mar 26, 2024Observed: 11.71 ft at 1:15AM Mar 26, 2024Observed: 11.73 ft at 1:30AM Mar 26, 2024Observed: 11.72 ft at 1:45AM Mar 26, 2024Observed: 11.74 ft at 2:00AM Mar 26, 2024Observed: 11.75 ft at 2:15AM Mar 26, 2024Observed: 11.76 ft at 2:30AM Mar 26, 2024Observed: 11.76 ft at 2:45AM Mar 26, 2024Observed: 11.77 ft at 3:00AM Mar 26, 2024Observed: 11.77 ft at 3:15AM Mar 26, 2024Observed: 11.74 ft at 3:30AM Mar 26, 2024Observed: 11.78 ft at 3:45AM Mar 26, 2024Observed: 11.76 ft at 4:00AM Mar 26, 2024Observed: 11.79 ft at 4:15AM Mar 26, 2024Observed: 11.78 ft at 4:30AM Mar 26, 2024Observed: 11.79 ft at 4:45AM Mar 26, 2024Observed: 11.79 ft at 5:00AM Mar 26, 2024Observed: 11.79 ft at 5:15AM Mar 26, 2024Observed: 11.79 ft at 5:30AM Mar 26, 2024Observed: 11.8 ft at 5:45AM Mar 26, 2024Observed: 11.79 ft at 6:00AM Mar 26, 2024Observed: 11.79 ft at 6:15AM Mar 26, 2024Observed: 11.79 ft at 6:30AM Mar 26, 2024Observed: 11.79 ft at 6:45AM Mar 26, 2024Observed: 11.79 ft at 7:00AM Mar 26, 2024Observed: 11.79 ft at 7:15AM Mar 26, 2024Observed: 11.79 ft at 7:30AM Mar 26, 2024Observed: 11.79 ft at 7:45AM Mar 26, 2024Observed: 11.79 ft at 8:00AM Mar 26, 2024Observed: 11.79 ft at 8:15AM Mar 26, 2024Observed: 11.8 ft at 8:30AM Mar 26, 2024Observed: 11.77 ft at 8:45AM Mar 26, 2024Observed: 11.79 ft at 9:00AM Mar 26, 2024Observed: 11.79 ft at 9:15AM Mar 26, 2024Observed: 11.77 ft at 9:30AM Mar 26, 2024Observed: 11.8 ft at 9:45AM Mar 26, 2024Observed: 11.8 ft at 10:00AM Mar 26, 2024Observed: 11.77 ft at 10:15AM Mar 26, 2024Observed: 11.8 ft at 10:30AM Mar 26, 2024Observed: 11.8 ft at 10:45AM Mar 26, 2024Observed: 11.82 ft at 11:00AM Mar 26, 2024Observed: 11.82 ft at 11:15AM Mar 26, 2024Observed: 11.83 ft at 11:30AM Mar 26, 2024Observed: 11.83 ft at 11:45AM Mar 26, 2024Observed: 11.81 ft at 12:00PM Mar 26, 2024Observed: 11.84 ft at 12:15PM Mar 26, 2024Observed: 11.84 ft at 12:30PM Mar 26, 2024Observed: 11.85 ft at 12:45PM Mar 26, 2024Observed: 11.86 ft at 1:00PM Mar 26, 2024Observed: 11.86 ft at 1:15PM Mar 26, 2024Observed: 11.86 ft at 1:30PM Mar 26, 2024Observed: 11.85 ft at 1:45PM Mar 26, 2024Observed: 11.86 ft at 2:00PM Mar 26, 2024Observed: 11.85 ft at 2:15PM Mar 26, 2024Observed: 11.85 ft at 2:30PM Mar 26, 2024Observed: 11.83 ft at 2:45PM Mar 26, 2024Observed: 11.83 ft at 3:00PM Mar 26, 2024Observed: 11.85 ft at 3:15PM Mar 26, 2024Observed: 11.84 ft at 3:30PM Mar 26, 2024Observed: 11.82 ft at 3:45PM Mar 26, 2024Observed: 11.83 ft at 4:00PM Mar 26, 2024Observed: 11.85 ft at 4:15PM Mar 26, 2024Observed: 11.84 ft at 4:30PM Mar 26, 2024Observed: 11.84 ft at 4:45PM Mar 26, 2024Observed: 11.79 ft at 5:00PM Mar 26, 2024Observed: 11.81 ft at 5:15PM Mar 26, 2024Observed: 11.8 ft at 5:30PM Mar 26, 2024Observed: 11.8 ft at 5:45PM Mar 26, 2024Observed: 11.8 ft at 6:00PM Mar 26, 2024Observed: 11.78 ft at 6:15PM Mar 26, 2024Observed: 11.79 ft at 6:30PM Mar 26, 2024Observed: 11.77 ft at 6:45PM Mar 26, 2024Observed: 11.74 ft at 7:00PM Mar 26, 2024Observed: 11.78 ft at 7:15PM Mar 26, 2024Observed: 11.77 ft at 7:30PM Mar 26, 2024Observed: 11.75 ft at 7:45PM Mar 26, 2024Observed: 11.77 ft at 8:00PM Mar 26, 2024Observed: 11.75 ft at 8:15PM Mar 26, 2024Observed: 11.75 ft at 8:30PM Mar 26, 2024Observed: 11.71 ft at 8:45PM Mar 26, 2024Observed: 11.7 ft at 9:00PM Mar 26, 2024Observed: 11.73 ft at 9:15PM Mar 26, 2024Observed: 11.73 ft at 9:30PM Mar 26, 2024Observed: 11.72 ft at 9:45PM Mar 26, 2024Observed: 11.73 ft at 10:00PM Mar 26, 2024Observed: 11.7 ft at 10:15PM Mar 26, 2024Observed: 11.71 ft at 10:30PM Mar 26, 2024Observed: 11.73 ft at 10:45PM Mar 26, 2024Observed: 11.72 ft at 11:00PM Mar 26, 2024Observed: 11.73 ft at 11:15PM Mar 26, 2024Observed: 11.7 ft at 11:30PM Mar 26, 2024Observed: 11.7 ft at 11:45PM Mar 26, 2024Observed: 11.73 ft at 12:00AM Mar 27, 2024Observed: 11.74 ft at 12:15AM Mar 27, 2024Observed: 11.74 ft at 12:30AM Mar 27, 2024Observed: 11.74 ft at 12:45AM Mar 27, 2024Observed: 11.75 ft at 1:00AM Mar 27, 2024Observed: 11.73 ft at 1:15AM Mar 27, 2024Observed: 11.74 ft at 1:30AM Mar 27, 2024Observed: 11.76 ft at 1:45AM Mar 27, 2024Observed: 11.77 ft at 2:00AM Mar 27, 2024Observed: 11.76 ft at 2:15AM Mar 27, 2024Observed: 11.78 ft at 2:30AM Mar 27, 2024Observed: 11.78 ft at 2:45AM Mar 27, 2024Observed: 11.79 ft at 3:00AM Mar 27, 2024Observed: 11.79 ft at 3:15AM Mar 27, 2024Observed: 11.81 ft at 3:30AM Mar 27, 2024Observed: 11.8 ft at 3:45AM Mar 27, 2024Observed: 11.8 ft at 4:00AM Mar 27, 2024Observed: 11.82 ft at 4:15AM Mar 27, 2024Observed: 11.81 ft at 4:30AM Mar 27, 2024Observed: 11.84 ft at 4:45AM Mar 27, 2024Observed: 11.83 ft at 5:00AM Mar 27, 2024Observed: 11.86 ft at 5:15AM Mar 27, 2024Observed: 11.85 ft at 5:30AM Mar 27, 2024Observed: 11.84 ft at 6:00AM Mar 27, 2024Observed: 11.87 ft at 6:30AM Mar 27, 2024Observed: 11.87 ft at 6:45AM Mar 27, 2024Observed: 11.88 ft at 7:00AM Mar 27, 2024Observed: 11.85 ft at 7:15AM Mar 27, 2024Observed: 11.88 ft at 7:30AM Mar 27, 2024Observed: 11.86 ft at 7:45AM Mar 27, 2024Observed: 11.9 ft at 8:00AM Mar 27, 2024Observed: 11.89 ft at 8:15AM Mar 27, 2024Observed: 11.86 ft at 8:30AM Mar 27, 2024Observed: 11.91 ft at 8:45AM Mar 27, 2024Observed: 11.9 ft at 9:00AM Mar 27, 2024Observed: 11.88 ft at 9:15AM Mar 27, 2024Observed: 11.92 ft at 9:30AM Mar 27, 2024Observed: 11.89 ft at 9:45AM Mar 27, 2024Observed: 11.9 ft at 10:00AM Mar 27, 2024Observed: 11.93 ft at 10:15AM Mar 27, 2024Observed: 11.93 ft at 10:30AM Mar 27, 2024Observed: 11.92 ft at 10:45AM Mar 27, 2024Observed: 11.94 ft at 11:00AM Mar 27, 2024Observed: 11.95 ft at 11:15AM Mar 27, 2024Observed: 11.94 ft at 11:30AM Mar 27, 2024Observed: 11.95 ft at 11:45AM Mar 27, 2024Observed: 11.94 ft at 12:00PM Mar 27, 2024Observed: 11.97 ft at 12:15PM Mar 27, 2024Observed: 11.99 ft at 12:30PM Mar 27, 2024Observed: 11.96 ft at 12:45PM Mar 27, 2024Observed: 11.96 ft at 1:00PM Mar 27, 2024Observed: 12 ft at 1:15PM Mar 27, 2024Observed: 11.99 ft at 1:30PM Mar 27, 2024Observed: 12 ft at 1:45PM Mar 27, 2024Observed: 12 ft at 2:00PM Mar 27, 2024Observed: 12.03 ft at 2:15PM Mar 27, 2024Observed: 12.04 ft at 2:30PM Mar 27, 2024Observed: 12.03 ft at 2:45PM Mar 27, 2024Observed: 12.06 ft at 3:00PM Mar 27, 2024Observed: 12.07 ft at 3:15PM Mar 27, 2024Observed: 12.09 ft at 3:45PM Mar 27, 2024Observed: 12.07 ft at 4:00PM Mar 27, 2024Observed: 12.09 ft at 4:15PM Mar 27, 2024Observed: 12.09 ft at 4:30PM Mar 27, 2024Observed: 12.07 ft at 4:45PM Mar 27, 2024Observed: 12.07 ft at 5:00PM Mar 27, 2024Observed: 12.09 ft at 5:15PM Mar 27, 2024Observed: 12.06 ft at 5:30PM Mar 27, 2024Observed: 12.09 ft at 5:45PM Mar 27, 2024Observed: 12.07 ft at 6:00PM Mar 27, 2024Observed: 12.1 ft at 6:15PM Mar 27, 2024Observed: 12.11 ft at 6:30PM Mar 27, 2024Observed: 12.09 ft at 6:45PM Mar 27, 2024Observed: 12.11 ft at 7:00PM Mar 27, 2024Observed: 12.09 ft at 7:15PM Mar 27, 2024Observed: 12.13 ft at 7:30PM Mar 27, 2024Observed: 12.1 ft at 7:45PM Mar 27, 2024Observed: 12.12 ft at 8:00PM Mar 27, 2024Observed: 12.1 ft at 8:15PM Mar 27, 2024Observed: 12.12 ft at 8:30PM Mar 27, 2024Observed: 12.11 ft at 8:45PM Mar 27, 2024Observed: 12.09 ft at 9:00PM Mar 27, 2024Observed: 12.12 ft at 9:15PM Mar 27, 2024Observed: 12.1 ft at 9:30PM Mar 27, 2024Observed: 12.12 ft at 9:45PM Mar 27, 2024Observed: 12.13 ft at 10:00PM Mar 27, 2024Observed: 12.12 ft at 10:15PM Mar 27, 2024Observed: 12.1 ft at 10:30PM Mar 27, 2024Observed: 12.13 ft at 10:45PM Mar 27, 2024Observed: 12.12 ft at 11:00PM Mar 27, 2024Observed: 12.13 ft at 11:15PM Mar 27, 2024Observed: 12.12 ft at 11:30PM Mar 27, 2024Observed: 12.11 ft at 11:45PM Mar 27, 2024Observed: 12.12 ft at 12:00AM Mar 28, 2024Observed: 12.13 ft at 12:15AM Mar 28, 2024Observed: 12.14 ft at 12:30AM Mar 28, 2024Observed: 12.15 ft at 12:45AM Mar 28, 2024Observed: 12.15 ft at 1:00AM Mar 28, 2024Observed: 12.16 ft at 1:15AM Mar 28, 2024Observed: 12.13 ft at 1:30AM Mar 28, 2024Observed: 12.14 ft at 1:45AM Mar 28, 2024Observed: 12.16 ft at 2:00AM Mar 28, 2024Observed: 12.18 ft at 2:15AM Mar 28, 2024Observed: 12.18 ft at 2:30AM Mar 28, 2024Observed: 12.18 ft at 2:45AM Mar 28, 2024Observed: 12.17 ft at 3:00AM Mar 28, 2024Observed: 12.19 ft at 3:15AM Mar 28, 2024Observed: 12.17 ft at 3:30AM Mar 28, 2024Observed: 12.19 ft at 3:45AM Mar 28, 2024Observed: 12.21 ft at 4:00AM Mar 28, 2024Observed: 12.19 ft at 4:15AM Mar 28, 2024Highest Observation: 12.22 ft at 4:30AM Mar 28, 2024Highest Forecast: 12.2 ft 8:00AM Mar 28, 2024Forecast: 12.1 ft 2:00PM Mar 28, 2024Forecast: 12.1 ft 8:00PM Mar 28, 2024Forecast: 12 ft 2:00AM Mar 29, 2024Forecast: 12 ft 8:00AM Mar 29, 2024Forecast: 12 ft 2:00PM Mar 29, 2024Forecast: 12 ft 8:00PM Mar 29, 2024Forecast: 11.9 ft 2:00AM Mar 30, 2024Forecast: 11.9 ft 8:00AM Mar 30, 2024Forecast: 11.8 ft 2:00PM Mar 30, 2024Forecast: 11.8 ft 8:00PM Mar 30, 2024Forecast: 11.7 ft 2:00AM Mar 31, 2024Forecast: 11.7 ft 8:00AM Mar 31, 2024Forecast: 11.6 ft 2:00PM Mar 31, 2024Forecast: 11.6 ft 8:00PM Mar 31, 2024Forecast: 11.6 ft 2:00AM Apr 01, 2024Forecast: 11.6 ft 8:00AM Apr 01, 2024SHRP1(plotting HPIRG) Graph Created (5:18AM Mar 28, 2024)ObservedForecast (issued 9:47AM Mar 27)Latest observed value: 12.22 ft at 4:30 AM EDT 28-Mar-2024. Flood Stage is 21 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
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: Stage may be affected by ice.

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

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Upstream Gauge - at C.W. Bill Young Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Pittsburgh
Flood Categories (in feet)
Major Flood Stage: 23
Moderate Flood Stage: 22
Flood Stage: 21
Action Stage: 16.3
Low Stage (in feet): -9999

Historic Crests
(1) 26.90 ft on 06/24/1972
(2) 22.90 ft on 01/20/1996
(3) 22.10 ft on 09/18/2004
(4) 18.50 ft on 03/16/2007
(5) 16.20 ft on 03/24/2007

(P): Preliminary values subject to further review.

Recent Crests
(1) 16.20 ft on 03/24/2007
(2) 18.50 ft on 03/16/2007
(3) 22.10 ft on 09/18/2004
(4) 22.90 ft on 01/20/1996
(5) 26.90 ft on 06/24/1972

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/01/1980

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:15
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
23.1 13th Street floods in Sharpsburg.
21.7 Trumbull Construction Co on 51st Street floods.
21.3 Flooding begins near the M & M Gas Station on North Main Street in Sharpsburg.
21 Lock wall overtopped.
19 Navigation suspended, lock out of service.
About This Location Collapse

Latitude: 40.487500° N, Longitude: 79.915278° 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 711.5 732.5 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 711.96 732.96  

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) 10 Day (NAEFS) 10 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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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
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Pittsburgh Weather Forecast Office
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Moon Township, PA 15108
(412) 262-1591
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Page last modified: 2-Nov-2020 7:30 PM
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