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Hydrograph River at a Glance Download
Monongahela River at Maxwell Lock and Dam Tailwater (ft)Flow (kcfs)Observed: 9.83 ft at 6:45PM Oct 20, 2017Observed: 9.88 ft at 7:00PM Oct 20, 2017Observed: 10.01 ft at 7:15PM Oct 20, 2017Observed: 9.97 ft at 7:30PM Oct 20, 2017Observed: 9.84 ft at 7:45PM Oct 20, 2017Observed: 9.84 ft at 8:00PM Oct 20, 2017Observed: 10.03 ft at 8:15PM Oct 20, 2017Observed: 10.01 ft at 8:30PM Oct 20, 2017Observed: 9.85 ft at 8:45PM Oct 20, 2017Observed: 10.03 ft at 9:00PM Oct 20, 2017Observed: 10.03 ft at 9:15PM Oct 20, 2017Observed: 10 ft at 9:30PM Oct 20, 2017Observed: 10.04 ft at 9:45PM Oct 20, 2017Observed: 10.08 ft at 10:00PM Oct 20, 2017Observed: 9.96 ft at 10:15PM Oct 20, 2017Observed: 9.96 ft at 10:30PM Oct 20, 2017Observed: 10.13 ft at 10:45PM Oct 20, 2017Observed: 10.17 ft at 11:00PM Oct 20, 2017Observed: 10.01 ft at 11:15PM Oct 20, 2017Observed: 10.16 ft at 11:30PM Oct 20, 2017Observed: 10.09 ft at 11:45PM Oct 20, 2017Observed: 10.11 ft at 12:00AM Oct 21, 2017Observed: 10.13 ft at 12:15AM Oct 21, 2017Observed: 10.17 ft at 12:30AM Oct 21, 2017Observed: 10.32 ft at 7:45AM Oct 21, 2017Observed: 10.28 ft at 8:00AM Oct 21, 2017Observed: 10.31 ft at 8:15AM Oct 21, 2017Observed: 10.22 ft at 8:30AM Oct 21, 2017Observed: 10.18 ft at 8:45AM Oct 21, 2017Observed: 10.27 ft at 9:00AM Oct 21, 2017Observed: 10.44 ft at 9:15AM Oct 21, 2017Observed: 10.38 ft at 9:30AM Oct 21, 2017Observed: 10.36 ft at 9:45AM Oct 21, 2017Observed: 10.26 ft at 10:00AM Oct 21, 2017Observed: 10.36 ft at 10:15AM Oct 21, 2017Observed: 10.36 ft at 10:30AM Oct 21, 2017Observed: 10.38 ft at 10:45AM Oct 21, 2017Observed: 10.24 ft at 11:00AM Oct 21, 2017Observed: 10.17 ft at 11:15AM Oct 21, 2017Observed: 10.24 ft at 11:30AM Oct 21, 2017Observed: 10.35 ft at 11:45AM Oct 21, 2017Observed: 10.3 ft at 12:00PM Oct 21, 2017Observed: 10.44 ft at 12:15PM Oct 21, 2017Observed: 10.27 ft at 12:30PM Oct 21, 2017Observed: 10.33 ft at 12:45PM Oct 21, 2017Observed: 10.35 ft at 1:00PM Oct 21, 2017Observed: 10.38 ft at 1:15PM Oct 21, 2017Observed: 10.27 ft at 1:30PM Oct 21, 2017Observed: 10.16 ft at 1:45PM Oct 21, 2017Observed: 10.19 ft at 2:00PM Oct 21, 2017Observed: 10.24 ft at 2:15PM Oct 21, 2017Observed: 10.26 ft at 2:30PM Oct 21, 2017Observed: 10.33 ft at 2:45PM Oct 21, 2017Observed: 10.25 ft at 3:00PM Oct 21, 2017Observed: 10.32 ft at 3:15PM Oct 21, 2017Observed: 10.36 ft at 3:30PM Oct 21, 2017Observed: 10.27 ft at 3:45PM Oct 21, 2017Observed: 10.27 ft at 4:00PM Oct 21, 2017Observed: 10.15 ft at 4:15PM Oct 21, 2017Observed: 10.19 ft at 4:30PM Oct 21, 2017Observed: 10.12 ft at 4:45PM Oct 21, 2017Observed: 10.24 ft at 5:00PM Oct 21, 2017Observed: 10.29 ft at 5:15PM Oct 21, 2017Observed: 10.14 ft at 5:30PM Oct 21, 2017Observed: 10.26 ft at 5:45PM Oct 21, 2017Highest Observation: 10.45 ft at 6:00PM Oct 21, 2017Observed: 10.25 ft at 6:15PM Oct 21, 2017Observed: 10.24 ft at 6:30PM Oct 21, 2017Observed: 10.16 ft at 6:45PM Oct 21, 2017Observed: 10.18 ft at 7:00PM Oct 21, 2017Observed: 10.1 ft at 7:15PM Oct 21, 2017Observed: 10.18 ft at 7:30PM Oct 21, 2017Observed: 10.26 ft at 7:45PM Oct 21, 2017Observed: 10.13 ft at 8:00PM Oct 21, 2017Observed: 10.15 ft at 8:15PM Oct 21, 2017Observed: 10.41 ft at 8:30PM Oct 21, 2017Observed: 10.19 ft at 8:45PM Oct 21, 2017Observed: 10.27 ft at 9:00PM Oct 21, 2017Observed: 10.13 ft at 9:15PM Oct 21, 2017Observed: 10.11 ft at 9:30PM Oct 21, 2017Observed: 10.08 ft at 9:45PM Oct 21, 2017Observed: 10.08 ft at 10:00PM Oct 21, 2017Observed: 10.22 ft at 10:15PM Oct 21, 2017Observed: 10.1 ft at 10:30PM Oct 21, 2017Observed: 10.06 ft at 10:45PM Oct 21, 2017Observed: 10.24 ft at 11:00PM Oct 21, 2017Observed: 10.1 ft at 11:15PM Oct 21, 2017Observed: 10.22 ft at 11:30PM Oct 21, 2017Observed: 10.1 ft at 11:45PM Oct 21, 2017Observed: 10.04 ft at 12:00AM Oct 22, 2017Observed: 10.05 ft at 12:15AM Oct 22, 2017Observed: 10.01 ft at 12:30AM Oct 22, 2017Observed: 10.17 ft at 12:45AM Oct 22, 2017Observed: 10.05 ft at 1:00AM Oct 22, 2017Observed: 10.01 ft at 1:15AM Oct 22, 2017Observed: 10.09 ft at 1:30AM Oct 22, 2017Observed: 10.07 ft at 1:45AM Oct 22, 2017Observed: 10.08 ft at 2:00AM Oct 22, 2017Observed: 10.05 ft at 2:15AM Oct 22, 2017Observed: 9.96 ft at 2:30AM Oct 22, 2017Observed: 9.91 ft at 2:45AM Oct 22, 2017Observed: 9.93 ft at 3:00AM Oct 22, 2017Observed: 10.03 ft at 3:15AM Oct 22, 2017Observed: 10 ft at 3:30AM Oct 22, 2017Observed: 9.94 ft at 3:45AM Oct 22, 2017Observed: 9.9 ft at 4:00AM Oct 22, 2017Observed: 9.98 ft at 4:15AM Oct 22, 2017Observed: 9.95 ft at 4:30AM Oct 22, 2017Observed: 9.95 ft at 4:45AM Oct 22, 2017Observed: 9.89 ft at 5:00AM Oct 22, 2017Observed: 9.84 ft at 5:15AM Oct 22, 2017Observed: 9.94 ft at 5:30AM Oct 22, 2017Observed: 9.91 ft at 5:45AM Oct 22, 2017Observed: 9.95 ft at 6:00AM Oct 22, 2017Observed: 9.93 ft at 6:15AM Oct 22, 2017Observed: 9.87 ft at 6:30AM Oct 22, 2017Observed: 9.94 ft at 6:45AM Oct 22, 2017Observed: 9.92 ft at 7:00AM Oct 22, 2017Observed: 9.85 ft at 7:15AM Oct 22, 2017Observed: 9.89 ft at 7:30AM Oct 22, 2017Observed: 9.75 ft at 7:45AM Oct 22, 2017Observed: 9.88 ft at 8:00AM Oct 22, 2017Observed: 9.89 ft at 8:15AM Oct 22, 2017Observed: 9.89 ft at 8:30AM Oct 22, 2017Observed: 9.9 ft at 8:45AM Oct 22, 2017Observed: 9.96 ft at 9:00AM Oct 22, 2017Observed: 9.88 ft at 9:15AM Oct 22, 2017Observed: 9.9 ft at 9:30AM Oct 22, 2017Observed: 9.87 ft at 9:45AM Oct 22, 2017Observed: 9.88 ft at 10:00AM Oct 22, 2017Observed: 9.86 ft at 10:15AM Oct 22, 2017Observed: 9.82 ft at 10:30AM Oct 22, 2017Observed: 9.9 ft at 10:45AM Oct 22, 2017Observed: 9.96 ft at 11:00AM Oct 22, 2017Observed: 9.94 ft at 11:15AM Oct 22, 2017Observed: 9.96 ft at 11:30AM Oct 22, 2017Observed: 9.94 ft at 11:45AM Oct 22, 2017Observed: 9.88 ft at 12:00PM Oct 22, 2017Observed: 9.91 ft at 12:15PM Oct 22, 2017Observed: 9.88 ft at 12:30PM Oct 22, 2017Observed: 9.87 ft at 12:45PM Oct 22, 2017Observed: 9.91 ft at 1:00PM Oct 22, 2017Observed: 9.85 ft at 1:15PM Oct 22, 2017Observed: 9.88 ft at 1:30PM Oct 22, 2017Observed: 9.94 ft at 1:45PM Oct 22, 2017Observed: 9.95 ft at 2:00PM Oct 22, 2017Observed: 10.03 ft at 2:15PM Oct 22, 2017Observed: 9.89 ft at 2:30PM Oct 22, 2017Observed: 9.98 ft at 2:45PM Oct 22, 2017Observed: 9.9 ft at 3:00PM Oct 22, 2017Observed: 9.86 ft at 3:15PM Oct 22, 2017Observed: 9.95 ft at 3:30PM Oct 22, 2017Observed: 9.9 ft at 3:45PM Oct 22, 2017Observed: 9.76 ft at 4:00PM Oct 22, 2017Observed: 9.93 ft at 4:15PM Oct 22, 2017Observed: 9.93 ft at 4:30PM Oct 22, 2017Observed: 10.02 ft at 4:45PM Oct 22, 2017Observed: 9.84 ft at 5:00PM Oct 22, 2017Observed: 9.91 ft at 5:15PM Oct 22, 2017Observed: 10.02 ft at 5:30PM Oct 22, 2017Observed: 10 ft at 5:45PM Oct 22, 2017Observed: 9.88 ft at 6:00PM Oct 22, 2017Observed: 9.88 ft at 6:15PM Oct 22, 2017Observed: 9.8 ft at 6:30PM Oct 22, 2017Observed: 9.9 ft at 6:45PM Oct 22, 2017Observed: 9.92 ft at 7:00PM Oct 22, 2017Observed: 9.96 ft at 7:15PM Oct 22, 2017Observed: 9.93 ft at 7:30PM Oct 22, 2017Observed: 9.88 ft at 7:45PM Oct 22, 2017Observed: 10.13 ft at 8:00PM Oct 22, 2017Observed: 10.15 ft at 8:15PM Oct 22, 2017Observed: 9.92 ft at 8:30PM Oct 22, 2017Observed: 9.93 ft at 8:45PM Oct 22, 2017Observed: 9.86 ft at 9:00PM Oct 22, 2017Observed: 9.93 ft at 9:15PM Oct 22, 2017Observed: 9.96 ft at 9:30PM Oct 22, 2017Observed: 9.9 ft at 9:45PM Oct 22, 2017Observed: 10.05 ft at 10:00PM Oct 22, 2017Observed: 9.86 ft at 10:15PM Oct 22, 2017Observed: 10.07 ft at 10:30PM Oct 22, 2017Observed: 10.15 ft at 10:45PM Oct 22, 2017Observed: 10.09 ft at 11:00PM Oct 22, 2017Observed: 9.95 ft at 11:15PM Oct 22, 2017Observed: 9.88 ft at 11:30PM Oct 22, 2017Observed: 9.93 ft at 11:45PM Oct 22, 2017Observed: 10.02 ft at 12:00AM Oct 23, 2017Observed: 9.93 ft at 12:15AM Oct 23, 2017Observed: 10.07 ft at 12:30AM Oct 23, 2017Observed: 9.98 ft at 12:45AM Oct 23, 2017Observed: 10.02 ft at 1:00AM Oct 23, 2017Observed: 10.1 ft at 1:15AM Oct 23, 2017Observed: 10.09 ft at 1:30AM Oct 23, 2017Observed: 10.05 ft at 1:45AM Oct 23, 2017Observed: 9.93 ft at 2:00AM Oct 23, 2017Observed: 9.95 ft at 2:15AM Oct 23, 2017Observed: 10.05 ft at 2:30AM Oct 23, 2017Observed: 9.91 ft at 2:45AM Oct 23, 2017Observed: 10.01 ft at 3:00AM Oct 23, 2017Observed: 10.04 ft at 3:15AM Oct 23, 2017Observed: 9.99 ft at 3:30AM Oct 23, 2017Observed: 10.09 ft at 3:45AM Oct 23, 2017Observed: 9.99 ft at 4:00AM Oct 23, 2017Observed: 10.09 ft at 4:15AM Oct 23, 2017Observed: 9.97 ft at 4:30AM Oct 23, 2017Observed: 9.93 ft at 4:45AM Oct 23, 2017Observed: 9.98 ft at 5:00AM Oct 23, 2017Observed: 10 ft at 5:15AM Oct 23, 2017Observed: 9.97 ft at 5:30AM Oct 23, 2017Observed: 10.05 ft at 5:45AM Oct 23, 2017Observed: 9.99 ft at 6:00AM Oct 23, 2017Observed: 10.08 ft at 6:15AM Oct 23, 2017Observed: 9.99 ft at 6:30AM Oct 23, 2017Observed: 10.1 ft at 6:45AM Oct 23, 2017Observed: 10.13 ft at 7:00AM Oct 23, 2017Observed: 9.96 ft at 7:15AM Oct 23, 2017Observed: 9.96 ft at 7:30AM Oct 23, 2017Observed: 10.03 ft at 7:45AM Oct 23, 2017Observed: 9.97 ft at 8:00AM Oct 23, 2017Observed: 9.98 ft at 8:15AM Oct 23, 2017Observed: 9.97 ft at 8:30AM Oct 23, 2017Observed: 10.05 ft at 8:45AM Oct 23, 2017Observed: 10.03 ft at 9:00AM Oct 23, 2017Observed: 10.01 ft at 9:15AM Oct 23, 2017Observed: 10.14 ft at 9:30AM Oct 23, 2017Observed: 10.13 ft at 9:45AM Oct 23, 2017Observed: 10.08 ft at 10:00AM Oct 23, 2017Observed: 10.02 ft at 10:15AM Oct 23, 2017Observed: 10 ft at 10:30AM Oct 23, 2017Observed: 10 ft at 10:45AM Oct 23, 2017Observed: 9.95 ft at 11:00AM Oct 23, 2017Observed: 9.99 ft at 11:15AM Oct 23, 2017Observed: 10.03 ft at 11:30AM Oct 23, 2017Observed: 10.15 ft at 11:45AM Oct 23, 2017Observed: 10 ft at 12:00PM Oct 23, 2017Observed: 10.01 ft at 12:15PM Oct 23, 2017Observed: 10.05 ft at 12:30PM Oct 23, 2017Observed: 9.92 ft at 12:45PM Oct 23, 2017Observed: 10.03 ft at 1:00PM Oct 23, 2017Observed: 10.04 ft at 1:15PM Oct 23, 2017Observed: 9.93 ft at 1:30PM Oct 23, 2017Observed: 9.9 ft at 1:45PM Oct 23, 2017Observed: 9.9 ft at 2:00PM Oct 23, 2017Observed: 10.18 ft at 2:15PM Oct 23, 2017Observed: 10.14 ft at 2:30PM Oct 23, 2017Observed: 10.02 ft at 2:45PM Oct 23, 2017Observed: 10.07 ft at 3:00PM Oct 23, 2017Observed: 10.04 ft at 3:15PM Oct 23, 2017Observed: 10 ft at 3:30PM Oct 23, 2017Observed: 10.09 ft at 3:45PM Oct 23, 2017Observed: 10.01 ft at 4:00PM Oct 23, 2017Observed: 9.93 ft at 4:15PM Oct 23, 2017Observed: 10.02 ft at 4:30PM Oct 23, 2017Observed: 10.06 ft at 4:45PM Oct 23, 2017Observed: 10.17 ft at 5:00PM Oct 23, 2017Observed: 9.95 ft at 5:15PM Oct 23, 2017Observed: 10.03 ft at 5:30PM Oct 23, 2017Forecast: 10.1 ft 8:00PM Oct 23, 2017Forecast: 10.5 ft 2:00AM Oct 24, 2017Forecast: 11.1 ft 8:00AM Oct 24, 2017Forecast: 11.6 ft 2:00PM Oct 24, 2017Highest Forecast: 12.4 ft 8:00PM Oct 24, 2017Forecast: 12.2 ft 2:00AM Oct 25, 2017Forecast: 11.4 ft 8:00AM Oct 25, 2017Forecast: 11 ft 2:00PM Oct 25, 2017Forecast: 10.9 ft 8:00PM Oct 25, 2017Forecast: 10.8 ft 2:00AM Oct 26, 2017Forecast: 10.6 ft 8:00AM Oct 26, 2017Forecast: 10.4 ft 2:00PM Oct 26, 2017Forecast: 10.3 ft 8:00PM Oct 26, 2017Forecast: 10.3 ft 2:00AM Oct 27, 2017Forecast: 10.2 ft 8:00AM Oct 27, 2017Forecast: 10.1 ft 2:00PM Oct 27, 2017Forecast: 10.1 ft 8:00PM Oct 27, 2017Forecast: 10.1 ft 2:00AM Oct 28, 2017Forecast: 10 ft 8:00AM Oct 28, 2017MAXP1(plotting HTIRG) Graph Created (6:32PM Oct 23, 2017)ObservedForecast (issued 10:35AM Oct 23)Latest observed value: 10.03 ft at 5:30 PM EDT 23-Oct-2017. Flood Stage is 32 ft
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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 Monongahela River at Maxwell Lock and Dam are issued routinely year-round.

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Upstream Gauge - at Grays Landing Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Charleroi Lock and Dam
Flood Categories (in feet)
Major Flood Stage: 36
Moderate Flood Stage: 34
Flood Stage: 32
Action Stage: 23.5
Low Stage (in feet): -9999

Historic Crests
(1) 44.40 ft on 11/05/1985
(2) 38.20 ft on 03/07/1967
(3) 38.00 ft on 03/05/1963
(4) 37.80 ft on 01/20/1996
(5) 36.50 ft on 02/19/2000
(6) 35.40 ft on 03/20/1963
(7) 33.32 ft on 07/30/2017
(8) 32.60 ft on 06/24/1972
(9) 32.50 ft on 05/25/1968
(10) 32.30 ft on 02/10/1994
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 33.32 ft on 07/30/2017
(2) 21.50 ft on 03/15/2015
(3) 30.89 ft on 03/05/2015
(4) 27.30 ft on 05/05/2009
(5) 23.90 ft on 06/05/2008
(6) 29.40 ft on 12/14/2007
(7) 31.40 ft on 11/20/2003
(8) 26.80 ft on 02/24/2003
(9) 36.50 ft on 02/19/2000
(10) 37.80 ft on 01/20/1996
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/01/1980
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
40.5 Flooding begins on the lower side of Main Street in Brownsville
35 Homes flood on Middle Street, Liberty Street, Water Street, Broadway Street, River Street, and Axton Street in West Brownsville.
33.5 Lock walls overtopped.
33.32 Water levels reach the flood levels of the flood of July 30, 2017.
32 Low lying areas of West Brownsville begin to flood.
31 Navigation suspended, lock out of service.
28 Middle Street and Liberty Street in West Brownsville are closed due to storm drain system backups, and several homes have basement flooding.
27 Brownsville Road at Albany Tunnel (near Assad Iron and Metal) in Fayette County is closed due to high water.
About This Location Collapse

Latitude: 40.001667° N, Longitude: 79.961111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 32 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 29 734.5 ft 766.5 ft 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
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics.

Click individual graphics to enlarge.

Resources Collapse
Hydrologic Resources Additional Resources
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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Page last modified: 21-Dec-2016 5:21 PM
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