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Flood in Genesee County, Michigan
34 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.
Genesee County, Michigan, has 34 flood events in the NCEI record since 1950, with at least one in 18 different years.
May is the busiest month, with 10 of the recorded events. The last 20 years account for 16 events against 18 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 2.6% of the 1,305 flood events recorded in Michigan; its 5.3 per 100 square miles compares with 2.3 statewide.
Compared with Michigan
| Measure | Genesee County | Michigan | US |
|---|---|---|---|
| Flood events since 1950 | 34 | 1,305 | 183,559 |
| Per 100 square miles | 5.3 | 2.3 | 5.2 |
| Per 10,000 residents | 0.8 | 1.3 | 5.5 |
| Deaths recorded | 0 | 12 | 2,961 |
| Busiest month | May | May | June |
By year
Seasonality
1Feb
5Mar
0Apr
0May
10Jun
9Jul
5Aug
2Sep
1Oct
0Nov
0Dec
1
Recorded events
All 34 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 |
|---|---|---|---|---|---|---|---|
| 21 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 10 Jul 2024 | Flood | — | — | — | — | — | County |
| 11 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 11 Jan 2020 | Flood | — | — | — | — | — | County |
| 20 Feb 2018 | Flood | — | — | — | — | — | County |
| 13 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 13 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 11 Aug 2014 | Flash Flood | — | — | — | — | — | County |
| 13 May 2014 | Flash Flood | — | $100K | — | — | — | County |
| 12 May 2014 | Flash Flood | — | — | — | — | — | County |
| 4 May 2012 | Flood | — | — | — | — | — | County |
| 4 May 2012 | Flash Flood | — | $7.1M | — | — | — | County |
| 28 Jul 2011 | Flash Flood | — | $15K | — | — | — | County |
| 13 May 2011 | Flash Flood | — | $100K | — | — | — | County |
| 19 Jun 2009 | Flash Flood | — | — | — | — | — | County |
| 17 Jun 2009 | Flood | — | $200K | — | — | — | County |
| 26 Jun 2006 | Flash Flood | — | $35K | — | — | — | County |
| 22 Sep 2005 | Flash Flood | — | $250K | — | — | — | County |
| 24 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 24 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 23 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 9 Feb 2001 | Flood | — | $15K | — | — | — | Forecast zone |
| 29 Jul 2000 | Flash Flood | — | $35K | — | — | — | County |
| 1 Jun 1999 | Flash Flood | — | — | — | — | — | County |
| 21 Jun 1997 | Flash Flood | — | — | — | — | — | County |
| 27 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 27 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 21 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 24 Dec 1996 | Flood | — | — | — | — | — | Forecast zone |
| 23 Jun 1996 | Flood | — | — | — | — | — | Forecast zone |
| 18 Jun 1996 | Flood | — | — | — | — | — | Forecast zone |
| 18 Jun 1996 | Flood | — | — | — | — | — | Forecast zone |
| 21 May 1996 | Flood | — | — | — | — | — | Forecast zone |
| 21 May 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Genesee County had?
34 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 Genesee County?
21 Jun 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Genesee County?
The flash flood of 4 May 2012, with property damage estimated by NCEI at $7.1M.
How does Genesee County compare with Michigan for flood?
5.3 events per 100 square miles against 2.3 statewide; the county holds 34 of the state's 1,305 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.