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Flood in Brown County, Ohio
111 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 111 flood events in Brown County, Ohio, between 1950 and 2026, spread over 28 years.
July is the busiest month, with 27 of the recorded events. The last 20 years account for 78 events against 33 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.6% of the 6,794 flood events recorded in Ohio; its 22.7 per 100 square miles compares with 16.6 statewide.
NCEI attributes 4 deaths in the county to floods and flash floods.
Compared with Ohio
| Measure | Brown County | Ohio | US |
|---|---|---|---|
| Flood events since 1950 | 111 | 6,794 | 183,559 |
| Per 100 square miles | 22.7 | 16.6 | 5.2 |
| Per 10,000 residents | 25.4 | 5.8 | 5.5 |
| Deaths recorded | 4 | 74 | 2,961 |
| Busiest month | July | June | June |
By year
Seasonality
6Feb
8Mar
6Apr
9May
16Jun
18Jul
27Aug
7Sep
12Oct
0Nov
0Dec
2
Recorded events
All 111 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 |
|---|---|---|---|---|---|---|---|
| 20 Jul 2025 | Flood | — | $5K | — | — | — | County |
| 20 Jul 2025 | Flash Flood | — | $20K | — | — | — | County |
| 20 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 20 Jul 2025 | Flash Flood | — | $15K | — | — | — | County |
| 29 Apr 2025 | Flash Flood | — | — | — | — | — | County |
| 11 Apr 2024 | Flood | — | — | — | — | — | County |
| 27 Jul 2023 | Flood | — | — | — | — | — | County |
| 18 Jul 2023 | Flash Flood | — | $5K | — | — | — | County |
| 18 Jul 2023 | Flash Flood | — | $50K | — | — | — | County |
| 3 Jan 2023 | Flood | — | — | — | — | — | County |
| 3 Jan 2023 | Flood | — | — | — | — | — | County |
| 21 Aug 2022 | Flood | — | — | — | — | — | County |
| 21 Aug 2022 | Flood | — | — | — | — | — | County |
| 6 May 2022 | Flood | — | — | — | — | — | County |
| 17 Feb 2022 | Flood | — | — | — | — | — | County |
| 28 Feb 2021 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flash Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 3 Sep 2020 | Flood | — | — | — | — | — | County |
| 24 May 2020 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2019 | Flood | — | — | — | — | — | County |
| 20 Apr 2019 | Flood | — | — | — | — | — | County |
| 20 Apr 2019 | Flood | — | — | — | — | — | County |
| 7 Feb 2019 | Flood | — | — | — | — | — | County |
| 7 Feb 2019 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flood | — | $5K | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 9 Sep 2018 | Flood | — | — | — | — | — | County |
| 22 Jul 2017 | Flash Flood | — | $250K | — | — | — | County |
| 24 Jun 2017 | Flood | — | $5K | — | — | — | County |
| 23 Jun 2017 | Flash Flood | — | $3K | — | — | — | County |
| 23 Jun 2017 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2017 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2017 | Flood | — | — | — | — | — | County |
| 1 Mar 2017 | Flash Flood | — | — | — | — | — | County |
| 1 Mar 2017 | Flood | — | — | — | — | — | County |
| 17 Aug 2016 | Flash Flood | — | $1K | — | — | — | County |
| 17 Aug 2016 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2016 | Flood | — | — | — | — | — | County |
| 29 Jul 2016 | Flash Flood | — | $5K | — | — | — | County |
| 26 Jul 2016 | Flood | — | — | — | — | — | County |
| 26 Jul 2016 | Flood | — | — | — | — | — | County |
| 22 Jul 2016 | Flash Flood | — | — | — | — | — | County |
| 22 Jul 2016 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2016 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2016 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2016 | Flash Flood | — | — | — | — | — | County |
| 29 May 2016 | Flash Flood | — | $50K | — | — | — | County |
| 29 May 2016 | Flood | — | — | — | — | — | County |
| 18 Jul 2015 | Flash Flood | — | $3.0M | — | 3 | 3 | County |
| 20 Jun 2014 | Flash Flood | — | $1K | — | — | — | County |
| 19 Jun 2014 | Flood | — | — | — | — | — | County |
| 19 Jun 2014 | Flood | — | $1K | — | — | — | County |
| 29 Apr 2014 | Flood | — | — | — | — | — | County |
| 4 Apr 2014 | 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 |
| 21 May 2012 | Flash Flood | — | $10K | — | — | — | County |
| 21 May 2012 | Flash Flood | — | $10K | — | — | — | County |
| 21 May 2012 | Flash Flood | — | $10K | — | — | — | County |
| 5 Dec 2011 | Flood | — | $1K | — | — | — | County |
| 21 Jun 2011 | Flash Flood | — | $1K | — | — | — | County |
| 23 Apr 2011 | Flash Flood | — | $2K | — | — | — | County |
| 2 Jun 2010 | Flash Flood | — | $2K | — | — | — | County |
| 2 May 2010 | Flash Flood | — | $5K | — | — | — | County |
| 21 Sep 2009 | Flash Flood | — | $2K | — | — | — | County |
| 21 Sep 2009 | Flood | — | $1K | — | — | — | County |
| 4 Jun 2008 | Flash Flood | — | $10K | — | — | — | County |
| 19 Mar 2008 | Flood | — | $10K | — | — | — | County |
| 4 Mar 2008 | Flood | — | $5K | — | — | — | County |
| 13 Jul 2006 | Flash Flood | — | — | — | — | — | County |
| 16 Jul 2005 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jul 2004 | Flood | — | — | — | — | — | Forecast zone |
| 9 Aug 2003 | Flood | — | — | — | — | — | Forecast zone |
| 4 Aug 2003 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 14 Jun 2003 | Flash Flood | — | — | — | — | — | County |
| 10 May 2003 | Flash Flood | — | — | — | — | — | County |
| 10 May 2003 | Flash Flood | — | — | — | — | — | County |
| 10 May 2003 | Flash Flood | — | — | — | — | — | County |
| 10 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 28 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 19 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 24 Jan 2002 | Flash Flood | — | — | — | — | — | County |
| 25 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 22 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 17 Jul 2001 | Flash Flood | — | $586K | — | — | — | County |
| 18 May 2001 | Flash Flood | — | $5K | — | — | — | County |
| 16 Dec 2000 | Flash Flood | — | $100K | — | — | — | County |
| 9 Aug 2000 | Flash Flood | — | $5K | — | — | — | County |
| 18 Feb 2000 | Flash Flood | — | $25K | — | — | — | County |
| 3 Jan 2000 | Flash Flood | — | $5K | — | — | — | County |
| 11 Jun 1998 | Flash Flood | — | $5K | — | — | — | County |
| 10 Jun 1998 | Flash Flood | — | $5K | — | — | — | County |
| 1 Jun 1997 | Flash Flood | — | $5K | — | — | — | County |
| 31 May 1997 | Flash Flood | — | $10K | — | — | — | County |
| 2 Mar 1997 | Flood | — | $2.0M | — | — | — | Forecast zone |
| 1 Mar 1997 | Flash Flood | — | $2.0M | — | 1 | — | County |
| 15 May 1996 | Flash Flood | — | $5K | — | — | — | County |
| 4 May 1996 | Flash Flood | — | $4K | — | — | — | County |
| 23 Jan 1996 | Flood | — | $500K | — | — | — | Forecast zone |
| 17 Jan 1996 | Flood | — | $10K | — | — | — | Forecast zone |
Questions and answers
How many flood events has Brown County had?
111 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 Brown County?
20 Jul 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Brown County?
The flash flood of 18 Jul 2015, with property damage estimated by NCEI at $3.0M; 3 deaths recorded.
How does Brown County compare with Ohio for flood?
22.7 events per 100 square miles against 16.6 statewide; the county holds 111 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.