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Tornado in Oneida County, Wisconsin
22 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.
NCEI records 22 tornado events in Oneida County, Wisconsin, between 1950 and 2026, spread over 16 years.
June is the busiest month, with 9 of the recorded events. The last 20 years account for 2 events against 10 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.2% of the 1,820 tornado events recorded in Wisconsin; its 2.0 per 100 square miles compares with 3.4 statewide.
NCEI attributes 5 deaths in the county to tornadoes.
By rating: 11 at (E)F0, 5 at (E)F1, 3 at (E)F2, 2 at (E)F3, 1 at (E)F4, 0 at (E)F5. Tornadoes before 2007 carry the original Fujita rating.
Compared with Wisconsin
| Measure | Oneida County | Wisconsin | US |
|---|---|---|---|
| Tornado events since 1950 | 22 | 1,820 | 81,281 |
| Per 100 square miles | 2.0 | 3.4 | 2.3 |
| Per 10,000 residents | 5.8 | 3.1 | 2.4 |
| Deaths recorded | 5 | 98 | 6,410 |
| Busiest month | June | June | May |
By year
Seasonality
0Feb
0Mar
0Apr
3May
2Jun
9Jul
4Aug
3Sep
1Oct
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 22 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 |
|---|---|---|---|---|---|---|---|
| 19 Jul 2019 | Tornado | EF0 | $400K | — | — | — | County |
| 16 May 2017 | Tornado | EF0 | — | — | — | — | County |
| 11 Jul 2004 | Tornado | F0 | — | — | — | — | County |
| 11 Jul 2004 | Tornado | F0 | — | — | — | — | County |
| 18 Apr 2002 | Tornado | F0 | — | — | — | — | County |
| 18 Apr 2002 | Tornado | F0 | — | — | — | — | County |
| 6 Sep 2001 | Tornado | F0 | $66K | — | — | — | County |
| 1 May 2001 | Tornado | F1 | $15K | — | — | — | County |
| 14 Aug 2000 | Tornado | F0 | — | — | — | — | County |
| 9 Aug 1993 | Tornado | F0 | — | $500 | — | — | County |
| 27 Jun 1991 | Tornado | F2 | $250K | — | — | — | County |
| 1 Aug 1988 | Tornado | F0 | — | — | — | — | County |
| 4 Jul 1986 | Tornado | F2 | $250K | — | — | — | County |
| 8 Jun 1985 | Tornado | F3 | $25M | — | 2 | 16 | County |
| 27 Apr 1984 | Tornado | F3 | $25M | — | 1 | 5 | County |
| 13 Jun 1981 | Tornado | F1 | $25K | — | — | — | County |
| 13 Jun 1981 | Tornado | F1 | $25K | — | — | — | County |
| 13 Jun 1981 | Tornado | F2 | $250K | — | — | — | County |
| 14 Jun 1980 | Tornado | F1 | $25K | — | — | 3 | County |
| 14 Jun 1980 | Tornado | F0 | $30 | — | — | — | County |
| 20 Jun 1953 | Tornado | F1 | $25K | — | — | — | County |
| 25 Jun 1950 | Tornado | F4 | $250K | — | 2 | 12 | County |
Questions and answers
How many tornado events has Oneida County had?
22 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 Oneida County?
19 Jul 2019 (Tornado, EF0). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Oneida County?
The tornado of 27 Apr 1984, with property damage estimated by NCEI at $25M; 1 death recorded.
How does Oneida County compare with Wisconsin for tornado?
2.0 events per 100 square miles against 3.4 statewide; the county holds 22 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.