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Flood in Marshall County, Illinois
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 Marshall County, Illinois, between 1950 and 2026, spread over 18 years.
May is the busiest month, with 13 of the recorded events. The last 20 years account for 25 events against 8 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.5% of the 6,507 flood events recorded in Illinois; its 8.5 per 100 square miles compares with 11.7 statewide.
Compared with Illinois
| Measure | Marshall County | Illinois | US |
|---|---|---|---|
| Flood events since 1950 | 33 | 6,507 | 183,559 |
| Per 100 square miles | 8.5 | 11.7 | 5.2 |
| Per 10,000 residents | 28.3 | 5.1 | 5.5 |
| Deaths recorded | 0 | 61 | 2,961 |
| Busiest month | May | June | June |
By year
Seasonality
0Feb
1Mar
2Apr
6May
13Jun
8Jul
3Aug
0Sep
0Oct
0Nov
0Dec
0
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 |
|---|---|---|---|---|---|---|---|
| 15 Jul 2021 | Flash Flood | — | — | — | — | — | County |
| 15 Jul 2021 | Flash Flood | — | — | — | — | — | County |
| 28 May 2020 | Flash Flood | — | $25K | — | — | — | County |
| 28 May 2019 | Flash Flood | — | — | — | — | — | County |
| 30 May 2018 | Flash Flood | — | — | — | — | — | County |
| 29 Apr 2017 | Flood | — | — | — | — | — | County |
| 29 Apr 2017 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2015 | Flash Flood | — | — | — | — | — | County |
| 10 Jun 2015 | Flash Flood | — | $150K | — | — | — | County |
| 1 Jul 2014 | Flood | — | — | — | — | — | County |
| 30 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 30 Jun 2014 | Flood | — | — | — | — | — | County |
| 24 Jun 2013 | Flash Flood | — | — | — | — | — | County |
| 27 May 2013 | Flood | — | — | — | — | — | County |
| 26 May 2013 | Flash Flood | — | — | — | — | — | County |
| 1 May 2013 | Flood | — | — | — | — | — | County |
| 18 Apr 2013 | Flood | — | $5.5M | — | — | — | County |
| 18 Apr 2013 | Flood | — | — | — | — | — | County |
| 17 Apr 2013 | Flash Flood | — | $10M | — | — | — | County |
| 3 May 2012 | Flash Flood | — | — | — | — | — | County |
| 19 Apr 2011 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 13 May 2009 | Flood | — | — | — | — | — | County |
| 10 Mar 2009 | Flood | — | — | — | — | — | County |
| 30 May 2004 | Flash Flood | — | — | — | — | — | County |
| 30 May 2004 | Flash Flood | — | — | — | — | — | County |
| 1 May 2003 | Flash Flood | — | — | — | — | — | County |
| 13 May 2002 | Flood | — | — | — | — | — | Forecast zone |
| 5 Jun 2001 | Flash Flood | — | — | — | — | — | County |
| 1 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
| 21 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 13 Jun 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Marshall 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 Marshall County?
15 Jul 2021 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Marshall County?
The flash flood of 17 Apr 2013, with property damage estimated by NCEI at $10M.
How does Marshall County compare with Illinois for flood?
8.5 events per 100 square miles against 11.7 statewide; the county holds 33 of the state's 6,507 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.