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Flood in Ross County, Ohio
118 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.
Ross County, Ohio, has 118 flood events in the NCEI record since 1950, with at least one in 25 different years.
June is the busiest month, with 28 of the recorded events. The last 20 years account for 76 events against 42 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.7% of the 6,794 flood events recorded in Ohio; its 17.1 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 | Ross County | Ohio | US |
|---|---|---|---|
| Flood events since 1950 | 118 | 6,794 | 183,559 |
| Per 100 square miles | 17.1 | 16.6 | 5.2 |
| Per 10,000 residents | 15.3 | 5.8 | 5.5 |
| Deaths recorded | 2 | 74 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
9Feb
9Mar
8Apr
11May
26Jun
28Jul
20Aug
3Sep
3Oct
1Nov
0Dec
0
Recorded events
All 118 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 | — | $20K | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | $20K | — | — | — | County |
| 1 Jul 2025 | Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | $25K | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | $50K | — | — | — | County |
| 1 Jul 2025 | Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | $2K | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 29 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 29 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 29 Jun 2025 | Flood | — | — | — | — | — | County |
| 29 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 29 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 6 Jun 2025 | Flood | — | — | — | — | — | County |
| 8 May 2025 | Flood | — | — | — | — | — | County |
| 8 May 2025 | Flood | — | — | — | — | — | County |
| 8 May 2025 | Flood | — | — | — | — | — | County |
| 27 Sep 2024 | Flood | — | — | — | — | — | County |
| 27 Sep 2024 | Flash Flood | — | — | — | — | — | County |
| 27 Sep 2024 | Flash Flood | — | — | — | — | — | County |
| 4 May 2024 | Flash Flood | — | — | — | — | — | County |
| 24 Mar 2023 | Flood | — | — | — | — | — | County |
| 26 May 2022 | Flood | — | — | — | — | — | County |
| 6 May 2022 | Flash Flood | — | — | — | — | — | County |
| 18 Feb 2022 | Flood | — | — | — | — | — | County |
| 17 Feb 2022 | Flood | — | $10K | — | — | — | County |
| 29 Jul 2021 | Flood | — | — | — | — | — | County |
| 29 Jul 2021 | Flood | — | — | — | — | — | County |
| 28 Feb 2021 | Flood | — | — | — | — | — | County |
| 4 Jun 2020 | Flood | — | — | — | — | — | County |
| 19 May 2020 | Flood | — | — | — | — | — | County |
| 1 Aug 2019 | Flood | — | — | — | — | — | County |
| 1 Aug 2019 | Flash Flood | — | $10K | — | — | — | County |
| 31 Jul 2019 | Flood | — | — | — | — | — | County |
| 7 Jul 2019 | Flood | — | — | — | — | — | County |
| 3 Jul 2019 | Flood | — | — | — | — | — | County |
| 19 Jun 2019 | Flood | — | — | — | — | — | County |
| 17 Jun 2019 | Flood | — | — | — | — | — | County |
| 17 Jun 2019 | Flood | — | — | — | — | — | County |
| 17 May 2019 | Flood | — | — | — | — | — | County |
| 7 Feb 2019 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flood | — | — | — | — | — | County |
| 6 Feb 2019 | Flood | — | $5K | — | — | — | County |
| 6 Feb 2019 | Flood | — | — | — | — | — | County |
| 19 Jun 2018 | Flood | — | — | — | — | — | County |
| 19 Jun 2018 | Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flash Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flood | — | — | — | — | — | County |
| 8 Jun 2018 | Flood | — | — | — | — | — | County |
| 15 Apr 2018 | Flood | — | — | — | — | — | County |
| 15 Apr 2018 | Flood | — | — | — | — | — | County |
| 15 Apr 2018 | Flood | — | — | — | — | — | County |
| 15 Apr 2018 | Flood | — | — | — | — | — | County |
| 15 Apr 2018 | Flood | — | — | — | — | — | County |
| 1 Mar 2018 | Flood | — | — | — | 1 | — | County |
| 23 Jun 2017 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2017 | Flood | — | — | — | — | — | County |
| 29 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 1 Mar 2017 | Flood | — | — | — | — | — | County |
| 21 May 2012 | Flood | — | — | — | — | — | County |
| 17 Jan 2012 | Flood | — | $1K | — | — | — | County |
| 11 May 2011 | Flash Flood | — | $15K | — | — | — | County |
| 11 May 2011 | Flood | — | $2K | — | — | — | County |
| 11 May 2011 | Flood | — | $2K | — | — | — | County |
| 10 May 2011 | Flash Flood | — | $2K | — | — | — | County |
| 10 May 2011 | Flash Flood | — | $10K | — | — | — | County |
| 12 Apr 2011 | Flood | — | $1K | — | — | — | County |
| 3 Jun 2010 | Flash Flood | — | $2K | — | — | — | County |
| 19 Mar 2008 | Flood | — | $5K | — | — | — | County |
| 4 Mar 2008 | Flood | — | $5K | — | — | — | County |
| 4 Oct 2006 | Flash Flood | — | $100K | — | — | — | County |
| 14 Jun 2005 | Flood | — | — | — | — | — | Forecast zone |
| 11 Jan 2005 | Flood | — | $10K | — | — | — | Forecast zone |
| 5 Jan 2005 | Flood | — | $20K | — | — | — | Forecast zone |
| 27 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 4 Jan 2004 | Flood | — | — | — | — | — | Forecast zone |
| 4 Jan 2004 | Flood | — | — | — | — | — | Forecast zone |
| 4 Jan 2004 | Flood | — | — | — | — | — | Forecast zone |
| 22 Aug 2003 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 31 Jul 2003 | Flash Flood | — | $10K | — | — | — | County |
| 23 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 23 Jul 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 2 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 10 Jul 2002 | Flash Flood | — | $10K | — | — | — | County |
| 13 Jun 2002 | Flood | — | — | — | — | — | Forecast zone |
| 13 Jun 2002 | Flood | — | — | — | — | — | Forecast zone |
| 8 May 2002 | Flash Flood | — | — | — | — | — | County |
| 7 May 2002 | Flash Flood | — | $5K | — | — | — | County |
| 21 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 6 Jun 2001 | Flash Flood | — | $3K | — | — | — | County |
| 18 May 2001 | Flash Flood | — | $2.0M | — | — | — | County |
| 17 May 2001 | Flash Flood | — | $5K | — | — | — | County |
| 16 May 2001 | Flash Flood | — | — | — | — | — | County |
| 16 May 2001 | Flash Flood | — | — | — | — | — | County |
| 12 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 23 May 2000 | Flash Flood | — | $5K | — | — | — | County |
| 18 Feb 2000 | Flash Flood | — | $25K | — | — | — | County |
| 18 Feb 2000 | Flood | — | — | — | — | — | Forecast zone |
| 3 Jan 2000 | Flash Flood | — | $5K | — | — | — | County |
| 28 Apr 1999 | Flash Flood | — | — | — | — | — | County |
| 16 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 1 Jun 1997 | Flood | — | — | — | — | — | Forecast zone |
| 2 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
| 2 Mar 1997 | Flash Flood | — | $250K | — | — | — | County |
| 1 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
| 14 Jun 1996 | Flash Flood | — | $10K | — | — | — | County |
| 4 May 1996 | Flash Flood | — | $5K | — | 1 | — | County |
| 1 May 1996 | Flood | — | $5K | — | — | — | Forecast zone |
| 23 Jan 1996 | Flood | — | $30K | — | — | — | Forecast zone |
| 17 Jan 1996 | Flood | — | $5K | — | — | — | Forecast zone |
Questions and answers
How many flood events has Ross County had?
118 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 Ross 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 Ross County?
The flash flood of 18 May 2001, with property damage estimated by NCEI at $2.0M.
How does Ross County compare with Ohio for flood?
17.1 events per 100 square miles against 16.6 statewide; the county holds 118 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.