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Flood in Brown County, Minnesota
19 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 19 flood events in Brown County, Minnesota, between 1950 and 2026, spread over 10 years.
March is the busiest month, with 8 of the recorded events. The last 20 years account for 14 events against 5 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.7% of the 2,680 flood events recorded in Minnesota; its 3.1 per 100 square miles compares with 3.4 statewide.
Compared with Minnesota
| Measure | Brown County | Minnesota | US |
|---|---|---|---|
| Flood events since 1950 | 19 | 2,680 | 183,559 |
| Per 100 square miles | 3.1 | 3.4 | 5.2 |
| Per 10,000 residents | 7.4 | 4.7 | 5.5 |
| Deaths recorded | 0 | 23 | 2,961 |
| Busiest month | March | June | June |
By year
Seasonality
0Feb
0Mar
8Apr
2May
2Jun
3Jul
1Aug
1Sep
2Oct
0Nov
0Dec
0
Recorded events
All 19 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 |
|---|---|---|---|---|---|---|---|
| 12 May 2023 | Flood | — | — | — | — | — | County |
| 17 Mar 2019 | Flood | — | — | — | — | — | County |
| 3 Jul 2018 | Flood | — | $385K | — | — | — | County |
| 17 Jun 2016 | Flash Flood | — | — | — | — | — | County |
| 18 Jun 2014 | Flood | — | $850K | — | — | — | County |
| 18 Jun 2014 | Flash Flood | — | — | — | — | — | County |
| 21 Mar 2011 | Flood | — | — | — | — | — | County |
| 23 Sep 2010 | Flood | — | — | — | — | — | County |
| 22 Sep 2010 | Flash Flood | — | — | — | — | — | County |
| 17 Mar 2010 | Flood | — | $160K | — | — | — | County |
| 16 Mar 2010 | Flood | — | — | — | — | — | County |
| 15 Mar 2010 | Flood | — | — | — | — | — | County |
| 19 Aug 2007 | Flash Flood | — | — | — | — | — | County |
| 12 Mar 2007 | Flood | — | — | — | — | — | County |
| 1 May 2001 | Flood | — | — | — | — | — | Forecast zone |
| 1 Apr 2001 | Flood | — | — | — | — | — | Forecast zone |
| 1 Apr 1997 | Flood | — | — | — | — | — | Forecast zone |
| 23 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
| 15 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Brown County had?
19 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 Brown County?
12 May 2023 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Brown County?
The flood of 18 Jun 2014, with property damage estimated by NCEI at $850K.
How does Brown County compare with Minnesota for flood?
3.1 events per 100 square miles against 3.4 statewide; the county holds 19 of the state's 2,680 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.