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Flood in Monroe County, Wisconsin
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.
Monroe County, Wisconsin, has 34 flood events in the NCEI record since 1950, with at least one in 14 different years.
July is the busiest month, with 9 of the recorded events. The last 20 years account for 30 events against 4 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 2,580 flood events recorded in Wisconsin; its 3.8 per 100 square miles compares with 4.8 statewide.
Compared with Wisconsin
| Measure | Monroe County | Wisconsin | US |
|---|---|---|---|
| Flood events since 1950 | 34 | 2,580 | 183,559 |
| Per 100 square miles | 3.8 | 4.8 | 5.2 |
| Per 10,000 residents | 7.4 | 4.4 | 5.5 |
| Deaths recorded | 0 | 30 | 2,961 |
| Busiest month | July | June | June |
By year
Seasonality
0Feb
0Mar
1Apr
0May
4Jun
8Jul
9Aug
5Sep
7Oct
0Nov
0Dec
0
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 |
|---|---|---|---|---|---|---|---|
| 26 Jun 2025 | Flood | — | — | — | — | — | County |
| 14 Jul 2024 | Flood | — | — | — | — | — | County |
| 14 Jul 2024 | Flash Flood | — | $20K | — | — | — | County |
| 14 Jul 2024 | Flash Flood | — | $80K | — | — | — | County |
| 7 May 2024 | Flash Flood | — | — | $115K | — | — | County |
| 7 Aug 2021 | Flash Flood | — | $5K | $7K | — | — | County |
| 28 Aug 2020 | Flash Flood | — | $160K | $22K | — | — | County |
| 28 May 2020 | Flash Flood | — | $5K | — | — | — | County |
| 14 Mar 2019 | Flood | — | — | — | — | — | County |
| 3 Sep 2018 | Flash Flood | — | $285K | $49K | — | — | County |
| 28 Aug 2018 | Flood | — | — | — | — | — | County |
| 28 Aug 2018 | Flash Flood | — | $27M | $210K | — | — | County |
| 4 May 2018 | Flood | — | — | — | — | — | County |
| 20 Jul 2017 | Flood | — | $3.0M | $1.9M | — | — | County |
| 20 Jul 2017 | Flood | — | — | — | — | — | County |
| 20 Jul 2017 | Flash Flood | — | $3.1M | $1.1M | — | — | County |
| 22 Sep 2016 | Flood | — | — | — | — | — | County |
| 21 Sep 2016 | Flash Flood | — | $170K | — | — | — | County |
| 19 Aug 2016 | Flood | — | — | — | — | — | County |
| 18 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 23 Sep 2010 | Flood | — | $6K | — | — | — | County |
| 23 Sep 2010 | Flood | — | $2K | — | — | — | County |
| 23 Sep 2010 | Flash Flood | — | $10K | — | — | — | County |
| 23 Sep 2010 | Flood | — | $20K | — | — | — | County |
| 14 Jul 2010 | Flash Flood | — | $10K | — | — | — | County |
| 11 Jul 2008 | Flood | — | $4K | — | — | — | County |
| 10 Jul 2008 | Flash Flood | — | $10K | $2K | — | — | County |
| 7 Jun 2008 | Flood | — | $20K | $30K | — | — | County |
| 7 Jun 2008 | Flood | — | $200K | $732K | — | — | County |
| 7 Jun 2008 | Flash Flood | — | $1.4M | $500K | — | — | County |
| 16 Jun 2004 | Flood | — | $75K | $35K | — | — | Forecast zone |
| 16 Jun 2004 | Flash Flood | — | $140K | $30K | — | — | County |
| 17 May 2000 | Flash Flood | — | $8K | $5K | — | — | County |
| 27 Jun 1998 | Flash Flood | — | $20K | — | — | — | County |
Questions and answers
How many flood events has Monroe 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 Monroe County?
26 Jun 2025 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Monroe County?
The flash flood of 28 Aug 2018, with property damage estimated by NCEI at $27M and crop damage at $210K.
How does Monroe County compare with Wisconsin for flood?
3.8 events per 100 square miles against 4.8 statewide; the county holds 34 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.