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Mahoning River at Youngstown

Highest listed crest 17.49 ftFlood stage 14.0 ft56 crests since 1910

The Mahoning River at Youngstown crested above flood stage 22 times among the 56 crests the National Weather Service lists from 1910 to 2026. The highest, 17.49 ft on July 23, 2003, was moderate flooding, 3.49 feet above flood stage. 2 other gauges on the Mahoning River crested above flood stage within a week of it.

The gauge

Highest listed crest
17.49 ft
July 23, 2003
Flood stage
14.0 ft
Major flooding from 20.5 ft
Crests at major
0
22 above flood stage
Most recent flood crest
April 2, 2026
14.86 ft, minor flooding
Location
Mahoning County
Near Youngstown (1.1 mi), Niles (7.3 mi), Warren (12.1 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Mahoning River at Youngstown
Action stage10.034May 10, 2021The level at which the NWS or its partners begin to take action
Flood stage (minor)14.019Apr 2, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage16.03Feb 18, 2022Some inundation of structures and roads near the stream
Major flood stage20.50—Extensive inundation of structures and roads

Every listed crest

56 crests from 1910 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Mahoning River at Youngstown, 1910 to 2026 10121416182022ft Flood stage 14.0 ftMajor 20.5 ft Mar 2, 1910: 16.30 ft, moderate flooding; 20,200 cubic feet per secondOct 2, 1910: 14.30 ft, minor flooding; 16,600 cubic feet per secondMay 13, 1914: 14.20 ft, minor flooding; 16,400 cubic feet per secondFeb 2, 1915: 12.40 ft, action stage; 13,200 cubic feet per secondJan 3, 1916: 13.80 ft, action stage; 15,500 cubic feet per secondDec 14, 1927: 12.70 ft, action stage; 14,000 cubic feet per secondApr 5, 1929: 12.60 ft, action stage; 13,800 cubic feet per secondMar 25, 1936: 14.31 ft, minor flooding; 16,900 cubic feet per secondJan 25, 1937: 14.92 ft, minor flooding; 17,600 cubic feet per secondApr 21, 1940: 12.78 ft, action stage; 13,900 cubic feet per secondDec 30, 1942: 14.04 ft, minor floodingMay 28, 1946: 14.16 ft, minor flooding; 11,400 cubic feet per secondJan 27, 1952: 13.62 ft, action stage; 13,400 cubic feet per secondMay 13, 1956: 13.20 ft, action stage; 11,800 cubic feet per secondMar 10, 1964: 13.10 ft, action stage; 12,400 cubic feet per secondApr 16, 1972: 13.48 ft, action stage; 9,950 cubic feet per secondMay 13, 1974: 12.79 ft, action stage; 9,070 cubic feet per secondFeb 18, 1976: 13.75 ft, action stage; 9,900 cubic feet per secondDec 16, 1977: 14.02 ft, minor flooding; 10,200 cubic feet per secondSep 16, 1979: 12.75 ft, action stage; 9,700 cubic feet per secondFeb 20, 1981: 12.43 ft, action stage; 8,570 cubic feet per secondJun 15, 1989: 12.76 ft, action stage; 9,810 cubic feet per secondJul 15, 1990: 10.81 ft, action stage; 8,150 cubic feet per secondDec 31, 1990: 13.67 ft, action stage; 10,500 cubic feet per secondJul 31, 1992: 12.70 ft, action stage; 9,760 cubic feet per secondJun 9, 1993: 12.56 ft, action stageApr 13, 1994: 15.44 ft, minor flooding; 11,900 cubic feet per secondMay 12, 1996: 14.90 ft, minor flooding; 11,400 cubic feet per secondDec 13, 1996: 11.84 ft, action stage; 9,060 cubic feet per secondJan 9, 1998: 12.60 ft, action stage; 9,680 cubic feet per secondJan 23, 1999: 12.08 ft, action stage; 6,200 cubic feet per secondApr 8, 2000: 13.03 ft, action stage; 10,000 cubic feet per secondMay 14, 2002: 10.17 ft, action stage; 7,640 cubic feet per secondJul 23, 2003: 17.49 ft, moderate floodingMay 23, 2004: 15.91 ft, minor flooding; 14,320 cubic feet per secondSep 9, 2004: 14.35 ft, minor flooding; 11,760 cubic feet per secondJan 6, 2005: 14.05 ft, minor flooding; 12,355 cubic feet per secondMar 2, 2007: 12.40 ft, action stage; 11,200 cubic feet per secondMar 15, 2007: 10.30 ft, action stage; 9,017 cubic feet per secondFeb 7, 2008: 15.23 ft, minor flooding; 14,000 cubic feet per secondMar 5, 2008: 14.86 ft, minor flooding; 13,700 cubic feet per secondMar 9, 2009: 12.10 ft, action stage; 10,200 cubic feet per secondFeb 28, 2011: 15.80 ft, minor flooding; 14,100 cubic feet per secondJan 27, 2012: 11.40 ft, action stage; 9,510 cubic feet per secondJul 12, 2013: 12.79 ft, action stage; 10,900 cubic feet per secondMay 1, 2014: 10.34 ft, action stage; 8,450 cubic feet per secondJun 16, 2015: 13.97 ft, action stage; 12,200 cubic feet per secondFeb 25, 2016: 10.09 ft, action stage; 7,900 cubic feet per secondJan 13, 2017: 14.67 ft, minor flooding; 12,500 cubic feet per secondApr 17, 2018: 14.32 ft, minor flooding; 12,100 cubic feet per secondJun 17, 2019: 13.62 ft, action stage; 11,400 cubic feet per secondMar 29, 2020: 12.53 ft, action stage; 10,300 cubic feet per secondMay 10, 2021: 10.16 ft, action stage; 7,970 cubic feet per secondFeb 18, 2022: 16.59 ft, moderate flooding; 14,500 cubic feet per secondApr 3, 2024: 14.37 ft, minor flooding; 12,200 cubic feet per secondApr 2, 2026: 14.86 ft, minor flooding; 12,628 cubic feet per second Highest, 17.49 ft, Jul 23, 2003 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Mahoning River at Youngstown 1910s: 3 1920s: 0 1930s: 2 1940s: 2 1950s: 0 1960s: 0 1970s: 1 1980s: 0 1990s: 2 2000s: 6 6 2010s: 3 2020s: 3 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.
  3. 2 crests measured on an earlier gauge datum are left out: 26.50 ft on Mar 26, 1913; 18.60 ft on Jan 22, 1959.

Highest crests

The 50 highest of 56 listed crests.

Highest listed crests, Mahoning River at Youngstown
1Jul 23, 200317.49+3.49Moderate—
2Feb 18, 202216.59+2.59Moderate14,500
3Mar 2, 191016.30+2.30Moderate20,200
4May 23, 200415.91+1.91Minor14,320
5Feb 28, 201115.80+1.80Minor14,100
6Apr 13, 199415.44+1.44Minor11,900
7Feb 7, 200815.23+1.23Minor14,000
8Jan 25, 193714.92+0.92Minor17,600
9May 12, 199614.90+0.90Minor11,400
10Mar 5, 200814.86+0.86Minor13,700
11Apr 2, 202614.86+0.86Minor12,628
12Jan 13, 201714.67+0.67Minor12,500
13Apr 3, 202414.37+0.37Minor12,200
14Sep 9, 200414.35+0.35Minor11,760
15Apr 17, 201814.32+0.32Minor12,100
16Mar 25, 193614.31+0.31Minor16,900
17Oct 2, 191014.30+0.30Minor16,600
18May 13, 191414.20+0.20Minor16,400
19May 28, 194614.16+0.16Minor11,400
20Jan 6, 200514.05+0.05Minor12,355
21Dec 30, 194214.04+0.04Minor—
22Dec 16, 197714.02+0.02Minor10,200
23Jun 16, 201513.97−0.03Action12,200
24Jan 3, 191613.80−0.20Action15,500
25Feb 18, 197613.75−0.25Action9,900
26Dec 31, 199013.67−0.33Action10,500
27Jan 27, 195213.62−0.38Action13,400
28Jun 17, 201913.62−0.38Action11,400
29Apr 16, 197213.48−0.52Action9,950
30May 13, 195613.20−0.80Action11,800
31Mar 10, 196413.10−0.90Action12,400
32Apr 8, 200013.03−0.97Action10,000
33May 13, 197412.79−1.21Action9,070
34Jul 12, 201312.79−1.21Action10,900
35Apr 21, 194012.78−1.22Action13,900
36Jun 15, 198912.76−1.24Action9,810
37Sep 16, 197912.75−1.25Action9,700
38Dec 14, 192712.70−1.30Action14,000
39Jul 31, 199212.70−1.30Action9,760
40Apr 5, 192912.60−1.40Action13,800
41Jan 9, 199812.60−1.40Action9,680
42Jun 9, 199312.56−1.44Action—
43Mar 29, 202012.53−1.47Action10,300
44Feb 20, 198112.43−1.57Action8,570
45Feb 2, 191512.40−1.60Action13,200
46Mar 2, 200712.40−1.60Action11,200
47Mar 9, 200912.10−1.90Action10,200
48Jan 23, 199912.08−1.92Action6,200
49Dec 13, 199611.84−2.16Action9,060
50Jan 27, 201211.40−2.60Action9,510

The worst floods along the Mahoning River

For this gauge's highest crests, the other gauges on the Mahoning River that crested above flood stage within a week.

July 23, 2003: 17.49 ft here, moderate flooding

  • LeavittsburgOH · Jul 23, 2003 · 17.16 ft · Major
  • WarrenOH · Jul 23, 2003 · 14.88 ft · Major

February 18, 2022: 16.59 ft here, moderate flooding

  • LeavittsburgOH · Feb 19, 2022 · 14.40 ft · Moderate
  • WarrenOH · Feb 19, 2022 · 11.08 ft · Moderate

May 23, 2004: 15.91 ft here, minor flooding

  • LeavittsburgOH · May 23, 2004 · 14.16 ft · Moderate
  • WarrenOH · May 23, 2004 · 11.04 ft · Moderate

Gauges on the Mahoning River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Mahoning River
LeavittsburgOH12.524.00 ft, Mar 26, 191310
Youngstown this gaugeOH14.017.49 ft, Jul 23, 20030
WarrenOH10.021.00 ft, Mar 26, 19137

Other gauges in Mahoning County

Flood gauges in Mahoning County
Youngstown12.016.90 ft, Jan 21, 19591

Mahoning County: every hazard · River floods across the country · Ohio

NOAA National Water Prediction Service, gauge YGWO1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.