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Flood in Warren County, Missouri
33 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 33 flood events in Warren County, Missouri, between 1950 and 2026, spread over 21 years.
June is the busiest month, with 10 of the recorded events. The last 20 years account for 19 events against 14 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.3% of the 10,821 flood events recorded in Missouri; its 7.7 per 100 square miles compares with 15.7 statewide.
Compared with Missouri
| Measure | Warren County | Missouri | US |
|---|---|---|---|
| Flood events since 1950 | 33 | 10,821 | 183,559 |
| Per 100 square miles | 7.7 | 15.7 | 5.2 |
| Per 10,000 residents | 9.0 | 17.5 | 5.5 |
| Deaths recorded | 0 | 159 | 2,961 |
| Busiest month | June | May | June |
By year
Seasonality
1Feb
1Mar
2Apr
3May
6Jun
10Jul
3Aug
2Sep
1Oct
2Nov
0Dec
2
Recorded events
All 33 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 May 2026 | Flood | — | — | — | — | — | County |
| 4 Apr 2025 | Flood | — | — | — | — | — | County |
| 26 Jul 2022 | Flash Flood | — | $25K | — | — | — | County |
| 25 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 25 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 2 Aug 2020 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 10 Jan 2020 | Flash Flood | — | — | — | — | — | County |
| 26 Aug 2019 | Flash Flood | — | — | — | — | — | County |
| 26 Dec 2015 | Flash Flood | — | — | — | — | — | County |
| 7 Apr 2015 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 2013 | Flash Flood | — | — | — | — | — | County |
| 18 Sep 2010 | Flash Flood | — | — | — | — | — | County |
| 5 Jun 2010 | Flood | — | — | — | — | — | County |
| 8 Oct 2009 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2009 | Flash Flood | — | — | — | — | — | County |
| 31 Mar 2008 | Flash Flood | — | — | — | — | — | County |
| 5 Feb 2008 | Flash Flood | — | — | — | — | — | County |
| 8 May 2007 | Flood | — | — | $5K | — | — | County |
| 7 Dec 2004 | Flash Flood | — | — | — | — | — | County |
| 25 Jun 2003 | Flash Flood | — | — | — | — | — | County |
| 12 May 2002 | Flash Flood | — | — | — | — | — | County |
| 12 May 2002 | Flash Flood | — | — | — | — | — | County |
| 7 May 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2001 | Flood | — | — | — | — | — | Forecast zone |
| 24 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 20 Jun 2000 | Flood | — | — | — | — | — | County |
| 6 Jul 1999 | Flood | — | — | — | — | — | County |
| 6 Oct 1998 | Flood | — | — | — | — | — | Forecast zone |
| 20 Mar 1998 | Flood | — | — | — | — | — | County |
| 22 Jun 1997 | Flash Flood | — | — | — | — | — | County |
| 1 May 1996 | Flood | — | — | — | — | — | Forecast zone |
| 28 Apr 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Warren County had?
33 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 Warren County?
18 May 2026 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Warren County?
The flash flood of 26 Jul 2022, with property damage estimated by NCEI at $25K.
How does Warren County compare with Missouri for flood?
7.7 events per 100 square miles against 15.7 statewide; the county holds 33 of the state's 10,821 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.