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Tornado in Dunn County, Wisconsin
24 tornadoes events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Tornado.
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.
Dunn County, Wisconsin, has 24 tornado events in the NCEI record since 1950, with at least one in 16 different years.
June is the busiest month, with 6 of the recorded events. The last 20 years account for 9 events against 6 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 1,820 tornado events recorded in Wisconsin; its 2.8 per 100 square miles compares with 3.4 statewide.
NCEI attributes 21 deaths in the county to tornadoes.
By rating: 6 at (E)F0, 9 at (E)F1, 6 at (E)F2, 1 at (E)F3, 0 at (E)F4, 2 at (E)F5. Tornadoes before 2007 carry the original Fujita rating.
Compared with Wisconsin
| Measure | Dunn County | Wisconsin | US |
|---|---|---|---|
| Tornado events since 1950 | 24 | 1,820 | 81,281 |
| Per 100 square miles | 2.8 | 3.4 | 2.3 |
| Per 10,000 residents | 5.3 | 3.1 | 2.4 |
| Deaths recorded | 21 | 98 | 6,410 |
| Busiest month | June | June | May |
By year
Seasonality
0Feb
0Mar
0Apr
2May
5Jun
6Jul
6Aug
0Sep
5Oct
0Nov
0Dec
0
Magnitude distribution
Enhanced Fujita scale wind estimates
- EF0/F0
- 65–85 mph (EF0)
- EF1/F1
- 86–110 mph (EF1)
- EF2/F2
- 111–135 mph (EF2)
- EF3/F3
- 136–165 mph (EF3)
- EF4/F4
- 166–200 mph (EF4)
- EF5/F5
- over 200 mph (EF5)
- Unrated
- no rating recorded
Tornado rating as recorded (Fujita scale before February 2007, Enhanced Fujita after).
Recorded events
All 24 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 |
|---|---|---|---|---|---|---|---|
| 9 May 2022 | Tornado | EF1 | — | — | — | — | County |
| 9 May 2022 | Tornado | EF0 | — | — | — | — | County |
| 21 Jul 2020 | Tornado | EF0 | — | — | — | — | County |
| 24 Sep 2019 | Tornado | EF0 | $250K | — | — | — | County |
| 18 Jul 2015 | Tornado | EF1 | $10K | — | — | — | County |
| 17 Jun 2015 | Tornado | EF0 | $2K | — | — | — | County |
| 27 Jun 2014 | Tornado | EF1 | $1.2M | — | — | — | County |
| 14 Jul 2010 | Tornado | EF0 | — | — | — | — | County |
| 25 May 2008 | Tornado | EF0 | $200K | — | — | — | County |
| 30 May 1998 | Tornado | F2 | $400K | — | — | 8 | County |
| 15 May 1998 | Tornado | F1 | $1.9M | — | — | 1 | County |
| 5 Jul 1997 | Tornado | F1 | — | — | — | — | County |
| 24 Jun 1997 | Tornado | F1 | $22K | — | — | — | County |
| 15 Jun 1997 | Tornado | F2 | $200K | — | — | — | County |
| 26 Apr 1994 | Tornado | F1 | $500K | $500K | — | — | County |
| 12 Sep 1982 | Tornado | F1 | $25K | — | — | — | County |
| 12 Sep 1982 | Tornado | F2 | $2.5M | — | — | — | County |
| 15 Jul 1980 | Tornado | F2 | $2.5M | — | 1 | 12 | County |
| 28 Sep 1971 | Tornado | F2 | $25K | — | — | 1 | County |
| 18 Jul 1971 | Tornado | F2 | $250K | — | — | — | County |
| 29 Apr 1970 | Tornado | F1 | $25K | — | — | — | County |
| 4 Jun 1958 | Tornado | F5 | $25M | — | 20 | 54 | County |
| 4 Jun 1958 | Tornado | F5 | $25M | — | — | — | County |
| 12 Sep 1951 | Tornado | F3 | $250K | — | — | 1 | County |
Questions and answers
How many tornado events has Dunn County had?
24 events in the NCEI Storm Events record between 1950 and 2026. Reporting of tornadoes became far more complete after 1996, so early decades undercount.
When was the last recorded tornado event in Dunn County?
9 May 2022 (Tornado, EF0). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Dunn County?
The tornado of 4 Jun 1958, with property damage estimated by NCEI at $25M; 20 deaths recorded.
How does Dunn County compare with Wisconsin for tornado?
2.8 events per 100 square miles against 3.4 statewide; the county holds 24 of the state's 1,820 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 Tornado hub and the county page.