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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Mahoning River at Youngstown Observed crest: 1.88 ft at 1:00am Nov 21 Observed: 1.88 ft at 1:00am Nov 21 Observed: 1.88 ft at 2:00am Nov 21 Observed: 1.88 ft at 3:00am Nov 21 Observed: 1.87 ft at 4:00am Nov 21 Observed: 1.87 ft at 5:00am Nov 21 Observed: 1.87 ft at 6:00am Nov 21 Observed: 1.87 ft at 7:00am Nov 21 Observed: 1.86 ft at 8:00am Nov 21 Observed: 1.86 ft at 9:00am Nov 21 Observed: 1.86 ft at 10:00am Nov 21 Observed: 1.85 ft at 11:00am Nov 21 Observed: 1.85 ft at 12:00pm Nov 21 Observed: 1.85 ft at 1:00pm Nov 21 Observed: 1.84 ft at 2:00pm Nov 21 Observed: 1.83 ft at 3:00pm Nov 21 Observed: 1.84 ft at 4:00pm Nov 21 Observed: 1.84 ft at 5:00pm Nov 21 Observed: 1.83 ft at 6:00pm Nov 21 Observed: 1.83 ft at 7:00pm Nov 21 Observed: 1.83 ft at 8:00pm Nov 21 Observed: 1.82 ft at 9:00pm Nov 21 Observed: 1.82 ft at 10:00pm Nov 21 Observed: 1.82 ft at 11:00pm Nov 21 Observed: 1.81 ft at 12:00am Nov 22 Observed: 1.81 ft at 1:00am Nov 22 Observed: 1.81 ft at 2:00am Nov 22 Observed: 1.81 ft at 3:00am Nov 22 Observed: 1.8 ft at 4:00am Nov 22 Observed: 1.8 ft at 5:00am Nov 22 Observed: 1.79 ft at 6:00am Nov 22 Observed: 1.79 ft at 7:00am Nov 22 Observed: 1.78 ft at 8:00am Nov 22 Observed: 1.78 ft at 9:00am Nov 22 Observed: 1.78 ft at 10:00am Nov 22 Observed: 1.78 ft at 11:00am Nov 22 Observed: 1.77 ft at 12:00pm Nov 22 Observed: 1.76 ft at 1:00pm Nov 22 Observed: 1.77 ft at 2:00pm Nov 22 Observed: 1.76 ft at 3:00pm Nov 22 Observed: 1.77 ft at 4:00pm Nov 22 Observed: 1.77 ft at 5:00pm Nov 22 Observed: 1.77 ft at 6:00pm Nov 22 Observed: 1.77 ft at 7:00pm Nov 22 Observed: 1.77 ft at 8:00pm Nov 22 Observed: 1.77 ft at 9:00pm Nov 22 Observed: 1.76 ft at 10:00pm Nov 22 Observed: 1.76 ft at 11:00pm Nov 22 Observed: 1.76 ft at 12:00am Nov 23 Observed: 1.76 ft at 1:00am Nov 23 Observed: 1.75 ft at 2:00am Nov 23 Observed: 1.75 ft at 3:00am Nov 23 Observed: 1.75 ft at 4:00am Nov 23 Observed: 1.75 ft at 5:00am Nov 23 Observed: 1.74 ft at 6:00am Nov 23 Observed: 1.74 ft at 7:00am Nov 23 Observed: 1.74 ft at 8:00am Nov 23 Observed: 1.74 ft at 9:00am Nov 23 Observed: 1.73 ft at 10:00am Nov 23 Observed: 1.73 ft at 11:00am Nov 23 Observed: 1.72 ft at 12:00pm Nov 23 Observed: 1.73 ft at 1:00pm Nov 23 Observed: 1.73 ft at 2:00pm Nov 23 Observed: 1.73 ft at 3:00pm Nov 23 Observed: 1.73 ft at 4:00pm Nov 23 Observed: 1.73 ft at 5:00pm Nov 23 Observed: 1.74 ft at 6:00pm Nov 23 Observed: 1.73 ft at 7:00pm Nov 23 Observed: 1.74 ft at 8:00pm Nov 23 Observed: 1.74 ft at 9:00pm Nov 23 Observed: 1.74 ft at 10:00pm Nov 23 Observed: 1.74 ft at 11:00pm Nov 23 Observed: 1.73 ft at 12:00am Nov 24 Graph Created (12:52am Nov 24, 2009) Observed USGS--Water Resources of the United States YGWO1 (plotting HGIRG) Gage 0 Datum: 824.10 Latest observed value: 1.73 ft at 12:00 AM EST 24-Nov-2009. Flood Stage is 10.0 ft. Stage (ft) Flow (kcfs)
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NOTE: Gauge readings inaccurate - awaiting repair.

NOTE: Forecasts for the Mahoning River at Youngstown are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Niles Upstream Gauge Downstream Gauge Downstream Gauge - near Beaver Falls

Flood Categories (in feet)
Major Flood Stage:20.5
Moderate Flood Stage:15
Flood Stage:10
Action Stage:7

Historical Crests
(1) 26.50 ft on 03/26/1913
(2) 18.60 ft on 01/22/1959
(3) 17.49 ft on 07/23/2003
(4) 16.30 ft on 03/02/1910
(5) 15.92 ft on 05/23/2004
(6) 15.23 ft on 02/07/2008
(7) 14.92 ft on 01/25/1937
(8) 14.35 ft on 09/09/2004
(9) 14.31 ft on 03/25/1936
(10) 14.30 ft on 10/02/1910

Low Water Records
(1) 0 ft on 08/16/1930
(1) 0 ft on 10/17/1988

 Mahoning River at Youngstown location map

Flood Impacts Collapse
22.0 SEVERE FLOODING WILL OCCUR FROM YOUNGSTOWN TO LOWELLVILLE. AREAS ALONG THE RIVER WILL BE COMPLETELY INUNDATED.
20.5 MAJOR FLOODING WILL OCCUR IN INDUSTRIAL AREAS EAST OF US 60. FLOODWATERS MAY REACH DEPTHS OF 2 TO 4 FEET ALONG RAILRAOD TRACKS IN THIS AREA.
15.0 FLOODING WILL SPREAD INTO INDUSTRIAL AREAS ALONG THE RIVER.
10.0 FLOODING OCCURS IN LOWLAND AREAS NEAR YOUNGSTOWN. LOW LYING SECONDARY ROADS MAY BE FLOODED.

About This Location Collapse
Latitude: 41.105000° N, Longitude: 80.662800° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 10 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 29 824.1 ft 834.1 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:
U.S. Geological Survey (USGS) Data and Site Info for Youngstown

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Hydrologic Resources
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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
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Cleveland, OH 44135
(216) 265-2370
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