Quiet Wisconsin Tornado Season in 2012

Through mid September, only four tornadoes have been reported in Wisconsin, well under the seasonal average of 23 and last year's 38. Since 1950, there has been only one year with fewer tornadoes in the state: 1952 with just one.

Wisconsin's tornadoes in 2012 (click image for larger view):
Wisconsin tornado map

Tornadoes can occur in autumn, but are relatively rare.


More About Wisconsin Tornadoes

Wisconsin average = 23 tornadoes per year, based on the climate period of 1981-2010

Most in one year = 62 in 2005

Least in one year (since 1950) = 1 in 1952. There were years with "zero" tornadoes from the mid-1800s through the 1940s, but they are not considered due to incomplete documentation and a lack of organized "spotters" or other witnesses.

Most in one month = 30 in June 2005

Most on one calendar day = 27 on August 18, 2005

Most consecutive days with tornadoes = 5, from July 4-8, 1994

Only month with no documented tornadoes = February

Longest tracked tornado = 170 miles, April 5, 1929, from southwest of River Falls (Pierce Co.) to Van Buskirk (Iron Co.)

Deadliest tornado = "New Richmond Tornado" on Jun 12, 1899 (St. Croix Co.)--117 deaths and 125 injured

Costliest tornado = "Barneveld Tornado" on June 8, 1984, $88.5 Million in 2012 dollars adjusted for inflation ($40 Million in 1984 dollars).

Most-recent violent tornado = "Oakfield Tornado" on July 18, 1996, in Fond du Lac County--rated F5.

"Average Wisconsin tornado" = Lasts about 7 minutes in duration, path length of 3.5 to 4 miles, maximum width about 125 yards, EF1 rating (winds 86 to 110 mph).

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