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Wisconsin Tornado Statistics (since 1950)
| Most Tornadoes in a Year | Least Tornadoes in a Year (since 1982) |
|
1. 2005: 62 tornadoes |
1. 2012: 4 tornadoes 2. 1995: 7 tornadoes 3. 1990: 9 tornadoes 4. 1991: 10 tornadoes 5. 1999: 11 tornadoes 6. 2001: 12 tornadoes 7. 2006: 13 tornadoes 8. 2003: 14 tornadoes 1997: 14 tornadoes 1986: 14 tornadoes |
| Most Tornadoes in One Day | ||
| Rank and Date | # | Notes |
|
1. Aug 18, 2005 |
27 24 22 19 18 17 15 13 13 12 |
Stoughton tornado Mothers Day outbreak QLCS outbreak - Preliminary Markensan F3 event Biggest April outbreak Pardeeville tornado Oakfield tornado |
| Most Tornadoes by Month | ||
| Month | Highest # of Tornadoes | 2nd Highest |
| January | 2 (2008) | 1 (1967) |
| February | 0 | 0 |
| March | 3 (1967) | 2 (1973, 1998) |
| April | 15 (2011) | 11 (1984) |
| May | 24 (1988) | 17 (1959) |
| June | 30 (2005) | 28 (1993) |
| July | 25 (1983) | 24 (2010) |
| August | 27 (2005) | 15 (1979) |
| September | 10 (2002, 1972) | 7 (1982, 1992) |
| October | 4 (1992) | 2 (numerous) |
| November | 2 (1960) | 1 (1971) |
| December | 5 (1970) | 0 |
| Deadliest Tornadoes* | |||
| Rank and Date | # Dead | # Injured | Area |
| 1. Jun 4, 1958 | 19 | 110 | Colfax |
| 2. Jun 8, 1984 | 9 | 200 | Barneveld |
| 3. Apr 3, 1956 | 7 | 50 | Berlin |
| 4. Sept 26, 1951 | 6 | 3 | Waupaca |
| 5. Jun 4, 1958 | 4 | 56 | Chippewa Falls |
| 6. May 10, 1953 | 4 | 27 | NW Wisconsin |
| 7. Jun 4, 1958 | 4 | 3 | Ludington |
| 8. Apr 4, 1981 | 3 | 53 | West Bend |
| 9. Apr 11, 1965 | 3 | 28 | Ixonia |
| 10. Jun 8, 1985 | 2 | 42 | Wintergreen Lake |
* The New Richmond tornado of Jun 12, 1899 is Wisconsin's deadliest tornado in state history, with 117 killed and 125 injured.
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