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Flood in Mahoning County, Ohio
37 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Mahoning County, Ohio, has 37 flood events in the NCEI record since 1950, with at least one in 15 different years.
May is the busiest month, with 6 of the recorded events. The last 20 years account for 11 events against 26 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.5% of the 6,794 flood events recorded in Ohio; its 9.0 per 100 square miles compares with 16.6 statewide.
Compared with Ohio
| Measure | Mahoning County | Ohio | US |
|---|---|---|---|
| Flood events since 1950 | 37 | 6,794 | 183,559 |
| Per 100 square miles | 9.0 | 16.6 | 5.2 |
| Per 10,000 residents | 1.6 | 5.8 | 5.5 |
| Deaths recorded | 0 | 74 | 2,961 |
| Busiest month | May | June | June |
By year
Seasonality
3Feb
2Mar
1Apr
3May
6Jun
6Jul
6Aug
4Sep
5Oct
0Nov
0Dec
1
Recorded events
All 37 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 4 Sep 2022 | Flash Flood | — | $4.5M | — | — | — | County |
| 17 Feb 2022 | Flood | — | $150K | — | — | — | County |
| 16 Jul 2021 | Flash Flood | — | $200K | — | — | — | County |
| 4 Jun 2020 | Flood | — | — | — | — | — | County |
| 28 May 2019 | Flash Flood | — | $3.0M | — | — | — | County |
| 10 Aug 2018 | Flash Flood | — | $1.1M | — | — | — | County |
| 23 Jun 2015 | Flash Flood | — | $2.2M | — | — | — | County |
| 14 May 2011 | Flood | — | — | — | — | — | County |
| 12 May 2011 | Flood | — | — | — | — | — | County |
| 28 Feb 2011 | Flood | — | $200K | — | — | — | County |
| 20 Aug 2007 | Flash Flood | — | $75K | — | — | — | County |
| 5 Aug 2005 | Flood | — | $50K | — | — | — | Forecast zone |
| 1 Jan 2005 | Flood | — | $800K | — | — | — | Forecast zone |
| 17 Sep 2004 | Flood | — | $500K | — | — | — | Forecast zone |
| 9 Sep 2004 | Flood | — | $500K | — | — | — | Forecast zone |
| 8 Sep 2004 | Flood | — | $250K | — | — | — | Forecast zone |
| 8 Sep 2004 | Flash Flood | — | $1.8M | — | — | — | County |
| 22 May 2004 | Flash Flood | — | $1.7M | — | — | — | County |
| 9 Aug 2003 | Flash Flood | — | $450K | — | — | — | County |
| 27 Jul 2003 | Flash Flood | — | $8.0M | — | — | — | County |
| 27 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 22 Jul 2003 | Flash Flood | — | $2.0M | — | — | — | County |
| 21 Jul 2003 | Flash Flood | — | $750K | — | — | — | County |
| 21 Jul 2003 | Flood | — | $10M | — | — | — | Forecast zone |
| 13 Jun 2003 | Flood | — | $100K | — | — | — | Forecast zone |
| 8 Apr 2000 | Flood | — | — | — | — | — | Forecast zone |
| 16 Apr 1998 | Flash Flood | — | — | — | — | — | County |
| 16 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 9 Jan 1998 | Flood | — | — | — | — | — | Forecast zone |
| 7 Jan 1998 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 1997 | Flood | — | — | — | — | — | Forecast zone |
| 11 Dec 1996 | Flash Flood | — | — | — | — | — | County |
| 24 Jun 1996 | Flash Flood | — | $250K | — | — | — | County |
| 13 Jun 1996 | Flash Flood | — | $50K | — | — | — | County |
| 11 May 1996 | Flood | — | $30K | — | — | — | Forecast zone |
| 11 May 1996 | Flash Flood | — | — | — | — | — | County |
| 20 Mar 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Mahoning County had?
37 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Mahoning County?
4 Sep 2022 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Mahoning County?
The flood of 21 Jul 2003, with property damage estimated by NCEI at $10M.
How does Mahoning County compare with Ohio for flood?
9.0 events per 100 square miles against 16.6 statewide; the county holds 37 of the state's 6,794 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.