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Flood in Seneca County, Ohio
32 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.
Seneca County, Ohio, has 32 flood events in the NCEI record since 1950, with at least one in 16 different years.
August is the busiest month, with 9 of the recorded events. The last 20 years account for 14 events against 18 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 5.8 per 100 square miles compares with 16.6 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Ohio
| Measure | Seneca County | Ohio | US |
|---|---|---|---|
| Flood events since 1950 | 32 | 6,794 | 183,559 |
| Per 100 square miles | 5.8 | 16.6 | 5.2 |
| Per 10,000 residents | 5.8 | 5.8 | 5.5 |
| Deaths recorded | 1 | 74 | 2,961 |
| Busiest month | August | June | June |
By year
Seasonality
3Feb
1Mar
0Apr
1May
5Jun
4Jul
7Aug
9Sep
0Oct
0Nov
0Dec
2
Recorded events
All 32 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 |
|---|---|---|---|---|---|---|---|
| 16 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 24 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Aug 2022 | Flash Flood | — | $250K | — | — | — | County |
| 11 May 2021 | Flood | — | — | — | — | — | County |
| 13 Jul 2017 | Flood | — | — | — | — | — | County |
| 23 Dec 2013 | Flash Flood | — | $40K | — | — | — | County |
| 22 Dec 2013 | Flood | — | $5K | — | 1 | — | County |
| 1 Jul 2013 | Flash Flood | — | $50K | — | — | — | County |
| 23 Jul 2011 | Flash Flood | — | $100K | — | — | — | County |
| 14 May 2011 | Flash Flood | — | $15K | — | — | — | County |
| 28 Feb 2011 | Flash Flood | — | $1.5M | — | — | — | County |
| 21 Aug 2007 | Flood | — | — | — | — | — | County |
| 20 Aug 2007 | Flood | — | $1.5M | $2K | — | — | County |
| 20 Aug 2007 | Flash Flood | — | $75K | — | — | — | County |
| 21 Jun 2006 | Flash Flood | — | $450K | $750K | — | — | County |
| 16 Jul 2005 | Flash Flood | — | $100K | — | — | — | County |
| 1 Jan 2005 | Flood | — | $375K | — | — | — | Forecast zone |
| 21 May 2004 | Flash Flood | — | $400K | — | — | — | County |
| 4 Aug 2003 | Flood | — | $100K | — | — | — | Forecast zone |
| 8 Jul 2003 | Flash Flood | — | $100K | $500K | — | — | County |
| 23 Aug 2000 | Flash Flood | — | — | — | — | — | County |
| 26 Aug 1998 | Flash Flood | — | $50K | — | — | — | County |
| 25 Aug 1998 | Flash Flood | — | $100K | — | — | — | County |
| 28 Jun 1998 | Flash Flood | — | $10K | — | — | — | County |
| 8 Jan 1998 | Flood | — | — | — | — | — | Forecast zone |
| 8 Jan 1998 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 1997 | Flash Flood | — | $70K | $40K | — | — | County |
| 1 Jun 1997 | Flood | — | $100K | — | — | — | Forecast zone |
| 25 May 1997 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 1996 | Flash Flood | — | — | — | — | — | County |
| 16 May 1996 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Seneca County had?
32 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 Seneca County?
16 Jul 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Seneca County?
The flood of 20 Aug 2007, with property damage estimated by NCEI at $1.5M and crop damage at $2K.
How does Seneca County compare with Ohio for flood?
5.8 events per 100 square miles against 16.6 statewide; the county holds 32 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.