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Flood in Green County, Wisconsin
60 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 60 flood events in Green County, Wisconsin, between 1950 and 2026, spread over 18 years.
June is the busiest month, with 17 of the recorded events. The last 20 years account for 33 events against 27 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 2.3% of the 2,580 flood events recorded in Wisconsin; its 10.3 per 100 square miles compares with 4.8 statewide.
Compared with Wisconsin
| Measure | Green County | Wisconsin | US |
|---|---|---|---|
| Flood events since 1950 | 60 | 2,580 | 183,559 |
| Per 100 square miles | 10.3 | 4.8 | 5.2 |
| Per 10,000 residents | 16.2 | 4.4 | 5.5 |
| Deaths recorded | 0 | 30 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
9Mar
5Apr
5May
5Jun
17Jul
7Aug
5Sep
4Oct
3Nov
0Dec
0
Recorded events
All 60 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 Jun 2026 | Flood | — | — | — | — | — | County |
| 17 Apr 2026 | Flash Flood | — | $5K | — | — | — | County |
| 15 Jul 2024 | Flash Flood | — | $10K | — | — | — | County |
| 22 Jun 2024 | Flood | — | $2K | — | — | — | County |
| 1 Oct 2019 | Flood | — | $20K | — | — | — | County |
| 15 Sep 2019 | Flood | — | $1K | — | — | — | County |
| 13 Mar 2019 | Flood | — | $10K | — | — | — | County |
| 13 Mar 2019 | Flood | — | $25K | — | — | — | County |
| 3 Oct 2018 | Flood | — | $10K | $5K | — | — | County |
| 1 Oct 2018 | Flood | — | $1K | $10K | — | — | County |
| 23 Sep 2018 | Flood | — | $1K | $2K | — | — | County |
| 22 Aug 2018 | Flood | — | $5K | $5K | — | — | County |
| 22 Aug 2018 | Flood | — | $1K | $1K | — | — | County |
| 21 Feb 2018 | Flood | — | $10K | — | — | — | County |
| 20 Feb 2018 | Flood | — | $5K | — | — | — | County |
| 20 Feb 2018 | Flood | — | $120K | — | — | — | County |
| 19 Feb 2018 | Flood | — | $50K | — | — | — | County |
| 22 Jul 2017 | Flood | — | $1K | — | — | — | County |
| 21 Jul 2017 | Flood | — | $172K | — | — | — | County |
| 20 Jul 2017 | Flood | — | $5K | $20K | — | — | County |
| 11 Jun 2015 | Flash Flood | — | $10K | $1K | — | — | County |
| 26 Jun 2013 | Flash Flood | — | $6K | $3K | — | — | County |
| 25 Jun 2013 | Flood | — | $8K | $3K | — | — | County |
| 24 Jun 2013 | Flood | — | $10K | $3K | — | — | County |
| 22 Jun 2013 | Flash Flood | — | $60K | $20K | — | — | County |
| 19 Apr 2013 | Flood | — | $3K | $1K | — | — | County |
| 18 Apr 2013 | Flood | — | $3K | $1K | — | — | County |
| 11 Apr 2013 | Flood | — | $5K | $1K | — | — | County |
| 11 Mar 2013 | Flood | — | $15K | $1K | — | — | County |
| 9 Aug 2009 | Flash Flood | — | $10K | — | — | — | County |
| 8 Jun 2008 | Flash Flood | — | $1.3M | $20M | — | — | County |
| 22 Aug 2007 | Flash Flood | — | $400K | $1.0M | — | — | County |
| 19 Aug 2007 | Flash Flood | — | $400K | $600K | — | — | County |
| 15 Feb 2005 | Flood | — | $5K | — | — | — | Forecast zone |
| 1 Jun 2004 | Flood | — | $100K | $1.0M | — | — | Forecast zone |
| 24 May 2004 | Flood | — | $1K | $200K | — | — | Forecast zone |
| 23 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 23 May 2004 | Flash Flood | — | $100K | $200K | — | — | County |
| 9 Feb 2001 | Flood | — | $10K | — | — | — | Forecast zone |
| 11 Sep 2000 | Flash Flood | — | $100K | — | — | — | County |
| 1 Jun 2000 | Flood | — | $100K | — | — | — | County |
| 1 Jun 2000 | Flash Flood | — | $400K | $1.2M | — | — | County |
| 31 May 2000 | Flash Flood | — | $100K | $100K | — | — | County |
| 20 Jul 1999 | Flood | — | — | — | — | — | County |
| 13 Jun 1999 | Flood | — | $100K | — | — | — | Forecast zone |
| 16 May 1999 | Flash Flood | — | $120K | $600K | — | — | County |
| 23 Apr 1999 | Flood | — | $8K | — | — | — | Forecast zone |
| 30 Mar 1998 | Flood | — | — | — | — | — | County |
| 19 Sep 1997 | Flood | — | — | — | — | — | County |
| 15 Jun 1997 | Flood | — | — | — | — | — | County |
| 1 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
| 18 Feb 1997 | Flood | — | $10K | $10K | — | — | Forecast zone |
| 18 Jul 1996 | Flash Flood | — | $6.0M | $6.0M | — | 1 | County |
| 18 Jul 1996 | Flash Flood | — | — | — | — | — | County |
| 17 Jun 1996 | Flash Flood | — | $30K | — | — | — | County |
| 17 Jun 1996 | Flash Flood | — | $15K | $500K | — | — | County |
| 17 Jun 1996 | Flash Flood | — | $15K | $2.0M | — | — | County |
| 17 Jun 1996 | Flood | — | — | $5.7M | — | — | Forecast zone |
| 12 Feb 1996 | Flood | — | — | — | — | — | Forecast zone |
| 10 Feb 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Green County had?
60 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 Green County?
11 Jun 2026 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Green County?
The flash flood of 8 Jun 2008, with property damage estimated by NCEI at $1.3M and crop damage at $20M.
How does Green County compare with Wisconsin for flood?
10.3 events per 100 square miles against 4.8 statewide; the county holds 60 of the state's 2,580 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.