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Flood in St. Clair County, Missouri
72 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 72 flood events in St. Clair County, Missouri, between 1950 and 2026, spread over 21 years.
June is the busiest month, with 18 of the recorded events. The last 20 years account for 45 events against 27 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.7% of the 10,821 flood events recorded in Missouri; its 10.7 per 100 square miles compares with 15.7 statewide.
NCEI attributes 2 deaths in the county to floods and flash floods.
Compared with Missouri
| Measure | St. Clair County | Missouri | US |
|---|---|---|---|
| Flood events since 1950 | 72 | 10,821 | 183,559 |
| Per 100 square miles | 10.7 | 15.7 | 5.2 |
| Per 10,000 residents | 76.8 | 17.5 | 5.5 |
| Deaths recorded | 2 | 159 | 2,961 |
| Busiest month | June | May | June |
By year
Seasonality
4Feb
0Mar
5Apr
5May
16Jun
18Jul
13Aug
3Sep
4Oct
3Nov
1Dec
0
Recorded events
All 72 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 |
|---|---|---|---|---|---|---|---|
| 13 Jun 2026 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2026 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2026 | Flood | — | — | — | — | — | County |
| 13 Jun 2026 | Flood | — | — | — | — | — | County |
| 28 May 2026 | Flood | — | $25K | — | — | — | County |
| 19 May 2026 | Flood | — | $20K | — | — | — | County |
| 19 May 2026 | Flood | — | — | — | — | — | County |
| 19 May 2026 | Flood | — | — | — | — | — | County |
| 18 May 2026 | Flash Flood | — | — | — | — | — | County |
| 20 Apr 2025 | Flood | — | — | — | — | — | County |
| 26 Apr 2024 | Flood | — | — | — | — | — | County |
| 7 Mar 2024 | Flood | — | — | — | — | — | County |
| 17 Jul 2021 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2020 | Flash Flood | — | $25K | — | — | — | County |
| 31 Jul 2020 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2020 | Flash Flood | — | $25K | — | — | — | County |
| 5 Jul 2019 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2019 | Flood | — | — | — | — | — | County |
| 22 Aug 2017 | Flash Flood | — | $2K | — | — | — | County |
| 26 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 16 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 3 Apr 2014 | Flash Flood | — | — | — | — | — | County |
| 24 Nov 2010 | Flash Flood | — | — | — | — | — | County |
| 15 Sep 2010 | Flash Flood | — | — | — | — | — | County |
| 19 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 19 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 20 May 2010 | Flood | — | — | — | — | — | County |
| 16 May 2010 | Flash Flood | — | $5K | — | — | — | County |
| 15 May 2010 | Flash Flood | — | $10K | — | — | — | County |
| 16 Jun 2009 | Flash Flood | — | — | — | — | — | County |
| 15 May 2009 | Flash Flood | — | — | — | — | — | County |
| 8 May 2009 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2009 | Flash Flood | — | — | — | — | — | County |
| 24 Mar 2009 | Flash Flood | — | — | — | — | — | County |
| 13 Sep 2008 | Flash Flood | — | — | — | — | — | County |
| 28 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 9 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 10 Apr 2008 | Flash Flood | — | — | — | — | — | County |
| 19 Mar 2008 | Flood | — | — | — | — | — | County |
| 18 Mar 2008 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 28 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 30 Mar 2007 | Flash Flood | — | — | — | — | — | County |
| 25 Aug 2005 | Flash Flood | — | — | — | — | — | County |
| 12 Jan 2005 | Flash Flood | — | — | — | — | — | County |
| 12 Jan 2005 | Flood | — | — | — | — | — | Forecast zone |
| 5 Jan 2005 | Flood | — | — | — | — | — | Forecast zone |
| 5 Jan 2005 | Flash Flood | — | — | — | — | — | County |
| 12 May 2002 | Flood | — | — | — | — | — | Forecast zone |
| 8 May 2002 | Flood | — | $10K | — | — | — | Forecast zone |
| 7 May 2002 | Flash Flood | — | — | — | — | — | County |
| 26 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 25 Jul 2001 | Flash Flood | — | — | — | 2 | — | County |
| 12 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2001 | Flash Flood | — | — | — | — | — | County |
| 14 Jun 2001 | Flash Flood | — | $200K | — | — | — | County |
| 14 Jun 2001 | Flood | — | — | — | — | — | Forecast zone |
| 30 May 2001 | Flash Flood | — | — | — | — | — | County |
| 28 Jul 2000 | Flash Flood | — | — | — | — | — | County |
| 20 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 28 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 4 May 1999 | Flash Flood | — | — | — | — | — | County |
| 17 Oct 1998 | Flash Flood | — | — | — | — | — | County |
| 5 Oct 1998 | Flash Flood | — | — | — | — | — | County |
| 4 Oct 1998 | Flash Flood | — | $50K | — | — | — | County |
| 14 Sep 1998 | Flash Flood | — | — | — | — | — | County |
| 19 Aug 1997 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 1997 | Flash Flood | — | — | — | — | — | County |
| 26 May 1997 | Flash Flood | — | — | — | — | — | County |
| 23 Sep 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has St. Clair County had?
72 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 St. Clair County?
13 Jun 2026 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in St. Clair County?
The flash flood of 14 Jun 2001, with property damage estimated by NCEI at $200K.
How does St. Clair County compare with Missouri for flood?
10.7 events per 100 square miles against 15.7 statewide; the county holds 72 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.