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Flood in Clinton County, Iowa
91 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 91 flood events in Clinton County, Iowa, between 1950 and 2026, spread over 24 years.
June is the busiest month, with 29 of the recorded events. The last 20 years account for 64 events against 27 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.2% of the 7,383 flood events recorded in Iowa; its 13.1 per 100 square miles compares with 13.2 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Iowa
| Measure | Clinton County | Iowa | US |
|---|---|---|---|
| Flood events since 1950 | 91 | 7,383 | 183,559 |
| Per 100 square miles | 13.1 | 13.2 | 5.2 |
| Per 10,000 residents | 19.6 | 23.1 | 5.5 |
| Deaths recorded | 1 | 18 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
2Mar
1Apr
10May
15Jun
29Jul
19Aug
7Sep
3Oct
4Nov
0Dec
1
Recorded events
All 91 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 |
|---|---|---|---|---|---|---|---|
| 11 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2024 | Flood | — | — | — | — | — | County |
| 25 Apr 2023 | Flood | — | — | — | — | — | County |
| 28 Jun 2020 | Flood | — | — | — | — | — | County |
| 6 Jun 2020 | Flood | — | — | — | — | — | County |
| 2 Jul 2019 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 2019 | Flood | — | — | — | — | — | County |
| 1 Jun 2019 | Flood | — | — | — | — | — | County |
| 30 May 2019 | Flood | — | — | — | — | — | County |
| 29 May 2019 | Flash Flood | — | — | — | — | — | County |
| 28 May 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flood | — | — | — | — | — | County |
| 1 May 2019 | Flood | — | — | — | — | — | County |
| 26 Apr 2019 | Flood | — | — | — | — | — | County |
| 4 Apr 2019 | Flood | — | — | — | — | — | County |
| 13 Mar 2019 | Flood | — | — | — | — | — | County |
| 6 Oct 2018 | Flash Flood | — | — | — | — | — | County |
| 1 Oct 2018 | Flood | — | — | — | — | — | County |
| 7 Sep 2018 | Flood | — | — | — | — | — | County |
| 9 Jun 2018 | Flash Flood | — | — | — | — | — | County |
| 30 Jul 2017 | Flood | — | $10K | — | — | — | County |
| 22 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 22 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 1 Oct 2016 | Flood | — | — | — | — | — | County |
| 29 Sep 2016 | Flood | — | $100K | — | — | — | County |
| 8 Sep 2016 | Flash Flood | — | $25K | — | — | — | County |
| 4 Aug 2016 | Flash Flood | — | — | — | — | — | County |
| 21 Dec 2015 | Flood | — | — | — | — | — | County |
| 18 Aug 2015 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 2 Jul 2014 | Flood | — | — | — | — | — | County |
| 26 Jun 2014 | Flood | — | — | — | — | — | County |
| 25 Jun 2013 | Flood | — | — | — | — | — | County |
| 24 Jun 2013 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2013 | Flood | — | — | — | — | — | County |
| 28 May 2013 | Flood | — | — | — | — | — | County |
| 18 Apr 2013 | Flood | — | — | — | — | — | County |
| 23 Aug 2011 | Flash Flood | — | — | — | — | — | County |
| 18 Apr 2011 | Flood | — | $250K | — | — | — | County |
| 2 Oct 2010 | Flood | — | — | — | — | — | County |
| 14 Aug 2010 | Flood | — | $125K | — | — | — | County |
| 28 Jul 2010 | Flood | — | $250K | — | — | — | County |
| 12 Jul 2010 | Flood | — | $250K | — | — | — | County |
| 8 Jul 2010 | Flood | — | $150K | — | — | — | County |
| 23 Jun 2010 | Flash Flood | — | $10K | — | — | — | County |
| 17 Jun 2010 | Flood | — | $500K | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 18 May 2010 | Flood | — | $250K | — | — | — | County |
| 27 Aug 2009 | Flood | — | $500K | — | — | — | County |
| 27 Aug 2009 | Flash Flood | — | $500K | — | — | — | County |
| 26 Aug 2009 | Flash Flood | — | — | — | — | — | County |
| 2 May 2009 | Flood | — | $125K | — | — | — | County |
| 12 Jun 2008 | Flash Flood | — | $5K | — | — | — | County |
| 1 Jun 2008 | Flood | — | $646K | — | — | — | County |
| 1 May 2008 | Flood | — | — | — | — | — | County |
| 1 Apr 2008 | Flood | — | — | — | — | — | County |
| 9 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 4 Jul 2007 | Flash Flood | — | $150K | — | — | — | County |
| 4 Jul 2007 | Flash Flood | — | $1K | — | — | — | County |
| 3 Jul 2007 | Flash Flood | — | $50K | — | — | — | County |
| 9 May 2006 | Flood | — | — | — | — | — | County |
| 1 Jun 2004 | Flood | — | — | — | — | — | Forecast zone |
| 22 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 16 May 2003 | Flood | — | $500K | — | — | — | Forecast zone |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 24 Apr 2002 | Flood | — | — | — | — | — | County |
| 21 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 1 May 2001 | Flood | — | — | — | — | — | Forecast zone |
| 15 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 24 Feb 2001 | Flood | — | — | — | — | — | County |
| 1 Jul 2000 | Flood | — | — | — | — | — | Forecast zone |
| 24 Jun 2000 | Flood | — | — | — | 1 | — | County |
| 1 Jun 2000 | Flood | — | — | — | — | — | Forecast zone |
| 23 Jul 1999 | Flood | — | — | — | — | — | Forecast zone |
| 3 Jul 1999 | Flood | — | — | — | — | — | Forecast zone |
| 17 May 1999 | Flood | — | — | — | — | — | Forecast zone |
| 8 Apr 1997 | Flood | — | — | — | — | — | Forecast zone |
| 20 Feb 1997 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Clinton County had?
91 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 Clinton County?
11 Jul 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Clinton County?
The flood of 1 Jun 2008, with property damage estimated by NCEI at $646K.
How does Clinton County compare with Iowa for flood?
13.1 events per 100 square miles against 13.2 statewide; the county holds 91 of the state's 7,383 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.