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Flood in Clermont County, Ohio
155 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.
NCEI records 155 flood events in Clermont County, Ohio, between 1950 and 2026, spread over 27 years.
June is the busiest month, with 42 of the recorded events. The last 20 years account for 86 events against 69 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 2.3% of the 6,794 flood events recorded in Ohio; its 34.2 per 100 square miles compares with 16.6 statewide.
NCEI attributes 2 deaths in the county to floods and flash floods.
Compared with Ohio
| Measure | Clermont County | Ohio | US |
|---|---|---|---|
| Flood events since 1950 | 155 | 6,794 | 183,559 |
| Per 100 square miles | 34.2 | 16.6 | 5.2 |
| Per 10,000 residents | 7.4 | 5.8 | 5.5 |
| Deaths recorded | 2 | 74 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
9Feb
7Mar
8Apr
22May
14Jun
42Jul
30Aug
12Sep
2Oct
2Nov
2Dec
5
Recorded events
All 155 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 |
|---|---|---|---|---|---|---|---|
| 18 Jun 2026 | Flash Flood | — | $4K | — | — | — | County |
| 6 Jun 2025 | Flash Flood | — | $1K | — | — | — | County |
| 29 Apr 2025 | Flood | — | — | — | — | — | County |
| 28 Aug 2024 | Flood | — | — | — | — | — | County |
| 18 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 18 Jul 2023 | Flash Flood | — | $20K | — | — | — | County |
| 18 Jul 2023 | Flash Flood | — | $5K | — | — | — | County |
| 15 Jul 2023 | Flood | — | — | — | — | — | County |
| 12 Jan 2023 | Flood | — | — | — | — | — | County |
| 3 Jan 2023 | Flood | — | $10K | — | — | — | County |
| 3 Jan 2023 | Flood | — | — | — | — | — | County |
| 5 Sep 2022 | Flash Flood | — | $5K | — | — | — | County |
| 21 Aug 2022 | Flood | — | — | — | — | — | County |
| 6 Aug 2022 | Flood | — | $5K | — | — | — | County |
| 6 May 2022 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flash Flood | — | — | — | — | — | County |
| 6 Jul 2020 | Flood | — | — | — | — | — | County |
| 6 Jul 2020 | Flood | — | — | — | — | — | County |
| 30 Jun 2020 | Flash Flood | — | $4K | — | — | — | County |
| 19 May 2020 | Flood | — | — | — | — | — | County |
| 19 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 19 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 19 Jun 2019 | Flood | — | $10K | — | — | — | County |
| 19 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 19 Jun 2019 | Flood | — | — | — | — | — | County |
| 18 Jun 2019 | Flood | — | $2K | — | — | — | County |
| 18 Jun 2019 | Flood | — | — | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | $8K | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | $20K | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | $20K | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2019 | Flood | — | — | — | — | — | County |
| 20 Apr 2019 | Flood | — | — | — | — | — | County |
| 7 Feb 2019 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flash Flood | — | $3K | — | — | — | County |
| 8 Jun 2018 | Flood | — | $20K | — | — | — | County |
| 8 Jun 2018 | Flood | — | — | — | — | — | County |
| 23 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2017 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 16 Apr 2017 | Flood | — | $5K | — | — | — | County |
| 16 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 16 Apr 2017 | Flood | — | — | — | — | — | County |
| 1 Mar 2017 | Flash Flood | — | — | — | — | — | County |
| 19 Oct 2016 | Flash Flood | — | — | — | — | — | County |
| 17 Aug 2016 | Flash Flood | — | — | — | — | — | County |
| 17 Aug 2016 | Flash Flood | — | — | — | — | — | County |
| 17 Aug 2016 | Flash Flood | — | $7K | — | — | — | County |
| 17 Aug 2016 | Flash Flood | — | — | — | — | — | County |
| 28 Jul 2016 | Flash Flood | — | — | — | — | — | County |
| 26 Apr 2016 | Flash Flood | — | — | — | — | — | County |
| 4 Apr 2014 | Flood | — | — | — | — | — | County |
| 22 Dec 2013 | Flash Flood | — | $1K | — | — | — | County |
| 22 Dec 2013 | Flood | — | — | — | — | — | County |
| 23 Jul 2013 | Flash Flood | — | $1K | — | — | — | County |
| 23 Jul 2013 | Flash Flood | — | $1K | — | — | — | County |
| 23 Jul 2013 | Flash Flood | — | $1K | — | — | — | County |
| 23 Jul 2013 | Flash Flood | — | $1K | — | — | — | County |
| 23 Jul 2013 | Flood | — | — | — | — | — | County |
| 10 Jul 2013 | Flash Flood | — | $1K | — | — | — | County |
| 10 Jul 2013 | Flash Flood | — | $1K | — | — | — | County |
| 1 May 2012 | Flash Flood | — | $3K | — | — | — | County |
| 5 Dec 2011 | Flood | — | $1K | — | — | — | County |
| 19 Jul 2011 | Flash Flood | — | $1K | — | — | — | County |
| 21 Jun 2011 | Flash Flood | — | $1K | — | — | — | County |
| 21 Jun 2011 | Flash Flood | — | $1K | — | — | — | County |
| 21 Jun 2011 | Flash Flood | — | $25K | — | — | — | County |
| 21 Jun 2011 | Flash Flood | — | $1K | — | — | — | County |
| 21 Jun 2011 | Flood | — | $1K | — | — | — | County |
| 21 Jun 2011 | Flood | — | $1K | — | — | — | County |
| 23 Apr 2011 | Flash Flood | — | $2K | — | — | — | County |
| 19 Apr 2011 | Flood | — | $1K | — | — | — | County |
| 12 Jun 2010 | Flash Flood | — | $25K | — | — | — | County |
| 9 Jun 2010 | Flood | — | $3K | — | 2 | — | County |
| 30 Jul 2009 | Flash Flood | — | $15K | — | — | — | County |
| 30 Jul 2009 | Flash Flood | — | $15K | — | — | — | County |
| 26 Jun 2009 | Flash Flood | — | $1K | — | — | — | County |
| 19 Mar 2008 | Flood | — | $5K | — | — | — | County |
| 4 Mar 2008 | Flood | — | $2K | — | — | — | County |
| 18 Jul 2006 | Flash Flood | — | — | — | — | — | County |
| 13 Jul 2006 | Flash Flood | — | $6K | — | — | — | County |
| 12 Mar 2006 | Flash Flood | — | — | — | — | — | County |
| 15 Nov 2005 | Flood | — | — | — | — | — | Forecast zone |
| 14 Jun 2005 | Flood | — | — | — | — | — | Forecast zone |
| 22 Apr 2005 | Flood | — | — | — | — | — | Forecast zone |
| 22 Apr 2005 | Flash Flood | — | — | — | — | — | County |
| 28 Mar 2005 | Flood | — | — | — | — | — | Forecast zone |
| 5 Jan 2005 | Flood | — | $20K | — | — | — | Forecast zone |
| 5 Jan 2005 | Flash Flood | — | $10K | — | — | — | County |
| 18 Oct 2004 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jul 2004 | Flood | — | — | — | — | — | Forecast zone |
| 8 Aug 2003 | Flood | — | — | — | — | — | Forecast zone |
| 2 Aug 2003 | Flash Flood | — | — | — | — | — | County |
| 15 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 13 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 May 2003 | Flash Flood | — | $100K | — | — | — | County |
| 22 Feb 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 Nov 2002 | Flood | — | — | — | — | — | Forecast zone |
| 6 Jun 2002 | Flood | — | — | — | — | — | Forecast zone |
| 28 May 2002 | Flood | — | — | — | — | — | Forecast zone |
| 8 May 2002 | Flash Flood | — | — | — | — | — | County |
| 7 May 2002 | Flash Flood | — | $3K | — | — | — | County |
| 28 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 21 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 19 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 18 Aug 2001 | Flash Flood | — | — | — | — | — | County |
| 11 Aug 2001 | Flash Flood | — | — | — | — | — | County |
| 26 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 25 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 18 Jul 2001 | Flood | — | — | — | — | — | Forecast zone |
| 17 Jul 2001 | Flash Flood | — | $1.8M | — | — | — | County |
| 6 Jun 2001 | Flash Flood | — | $3K | — | — | — | County |
| 18 May 2001 | Flash Flood | — | $5K | — | — | — | County |
| 16 Dec 2000 | Flash Flood | — | $5K | — | — | — | County |
| 9 Aug 2000 | Flash Flood | — | $5K | — | — | — | County |
| 4 Jul 2000 | Flash Flood | — | $5K | — | — | — | County |
| 21 Feb 2000 | Flood | — | — | — | — | — | Forecast zone |
| 18 Feb 2000 | Flash Flood | — | $10K | — | — | — | County |
| 18 Feb 2000 | Flood | — | — | — | — | — | Forecast zone |
| 18 Feb 2000 | Flood | — | — | — | — | — | Forecast zone |
| 14 Feb 2000 | Flood | — | — | — | — | — | Forecast zone |
| 4 Jan 2000 | Flood | — | — | — | — | — | Forecast zone |
| 3 Jan 2000 | Flash Flood | — | $50K | — | — | — | County |
| 16 Jun 1998 | Flash Flood | — | — | — | — | — | County |
| 11 Jun 1998 | Flash Flood | — | $5K | — | — | — | County |
| 10 Jun 1998 | Flash Flood | — | $100K | — | — | — | County |
| 16 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 16 Apr 1998 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 1997 | Flash Flood | — | $5K | — | — | — | County |
| 16 Jun 1997 | Flash Flood | — | $10K | — | — | — | County |
| 1 Jun 1997 | Flash Flood | — | $10K | — | — | — | County |
| 1 Jun 1997 | Flood | — | — | — | — | — | Forecast zone |
| 2 Mar 1997 | Flood | — | $3.0M | — | — | — | Forecast zone |
| 2 Mar 1997 | Flash Flood | — | $10K | — | — | — | County |
| 1 Mar 1997 | Flash Flood | — | $10K | — | — | — | County |
| 1 Dec 1996 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 1996 | Flash Flood | — | $25K | — | — | — | County |
| 15 May 1996 | Flood | — | — | — | — | — | Forecast zone |
| 15 May 1996 | Flash Flood | — | $5K | — | — | — | County |
| 11 May 1996 | Flood | — | — | — | — | — | Forecast zone |
| 4 May 1996 | Flash Flood | — | $10K | — | — | — | County |
| 29 Apr 1996 | Flash Flood | — | $2K | — | — | — | County |
| 29 Apr 1996 | Flood | — | $5K | — | — | — | Forecast zone |
| 23 Jan 1996 | Flood | — | $1.0M | — | — | — | Forecast zone |
| 17 Jan 1996 | Flood | — | $30K | — | — | — | Forecast zone |
Questions and answers
How many flood events has Clermont County had?
155 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 Clermont County?
18 Jun 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Clermont County?
The flood of 2 Mar 1997, with property damage estimated by NCEI at $3.0M.
How does Clermont County compare with Ohio for flood?
34.2 events per 100 square miles against 16.6 statewide; the county holds 155 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.