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ALERT: Update on status of the nationwide data transmission error that prevents stream gauge data collected at affected locations from being displayed on the Advanced Hydrologic Prediction Services (AHPS) webpages. The USGS has restored the transmission from all of their gauges or has placed them in a seasonal outage (some Alaska gauges). There are a few USGS gauges that the NWS is not yet receiving the new transmissions and NWS is working to get that data by alternate means. A map of the status of USGS gauges is here. The status map of gauge outages from other agencies is here. The situation has greatly improved and will continue to improve but at a slower pace. The outage maps will now be updated once per week on Thursday. We apologize for the service interruption and hope to have the data restored as soon as possible.

Hydrograph River at a Glance Download
Allegheny River at Kittanning Lock and Dam Pool (ft)Flow (kcfs)Highest Forecast: 13.3 ft 7:00AM Nov 13, 2018Highest Forecast: 13.3 ft 1:00PM Nov 13, 2018Highest Forecast: 13.3 ft 7:00PM Nov 13, 2018Highest Forecast: 13.3 ft 1:00AM Nov 14, 2018Forecast: 13.2 ft 7:00AM Nov 14, 2018Forecast: 13.2 ft 1:00PM Nov 14, 2018Forecast: 13.2 ft 7:00PM Nov 14, 2018Forecast: 13.1 ft 1:00AM Nov 15, 2018Forecast: 13 ft 7:00AM Nov 15, 2018Forecast: 13 ft 1:00PM Nov 15, 2018Forecast: 12.9 ft 7:00PM Nov 15, 2018Forecast: 12.4 ft 1:00AM Nov 16, 2018Forecast: 12.4 ft 7:00AM Nov 16, 2018Forecast: 12.3 ft 1:00PM Nov 16, 2018Forecast: 12.3 ft 7:00PM Nov 16, 2018Forecast: 12.2 ft 1:00AM Nov 17, 2018Forecast: 12.1 ft 7:00AM Nov 17, 2018USGS--Water Resources of the United StatesKTTP1(plotting HPIRG) Graph Created (1:17AM Nov 13, 2018)ObservedForecast (issued 9:47AM Nov 12)Latest observed value: 14.14 ft at 12:00 PM EST 8-Nov-2018. Flood Stage is 21 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
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 Kittanning Lock and Dam are issued routinely year-round.

Return to Area Map
Upstream Gauge - at Mosgrove Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Clinton Lock and Dam
Flood Categories (in feet)
Major Flood Stage: 23
Moderate Flood Stage: 22
Flood Stage: 21
Action Stage: 17
Low Stage (in feet): -9999

Historic Crests
(1) 30.70 ft on 03/26/1913
(2) 24.80 ft on 03/10/1964
(3) 24.60 ft on 01/22/1959
(4) 24.20 ft on 03/18/1936
(5) 23.70 ft on 06/23/1972
(6) 23.70 ft on 12/30/1942
(7) 22.70 ft on 01/20/1996
(8) 22.20 ft on 02/14/1966
(9) 22.20 ft on 09/18/2004
(10) 21.70 ft on 02/20/1981
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 20.47 ft on 03/16/2007
(2) 22.20 ft on 09/18/2004
(3) 22.70 ft on 01/20/1996
(4) 19.70 ft on 12/31/1990
(5) 19.50 ft on 02/25/1985
(6) 20.90 ft on 02/14/1984
(7) 21.70 ft on 02/20/1981
(8) 21.30 ft on 02/17/1976
(9) 23.70 ft on 06/23/1972
(10) 22.20 ft on 02/14/1966
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
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
28.6 Water overtops flood wall from near Chestnut Street to Ewing Street above the dam.
24.8 County Health Center on South McKean Street floods.
21.2 South Water Street, Mulberry Street and Arch Street flood.
19.6 Lock walls overtopped.
17 Navigation suspended, lock out of service.
About This Location Collapse

Latitude: 40.820278° N, Longitude: 79.531667° 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)
(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 29 773.4 ft 794.4 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 10:38 PM
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