2011 Wisconsin Tornado Count & Fatality/Injury/Monetary Damage Estimates (Updated 12/03)

(Updated to include graphical plot of tornadoes)

Wisconsin's 2011 preliminary tornado count is 38. 

Wisconsin's 2011 tornadoes occurred on 10 days....April 10th, May 22nd, June 8th, June 19th, June 21st, July 1st, July 19th, August 8th, August 19th, and August 23rd.

Preliminary     2011
EF0 13
EF1 17
EF2 7
EF3 1
EF4 0
EF5 0
Total 38

The year with the most documented tornadoes in Wisconsin was 2005 with 62.  In second place is 2010 with 46.  Third place is occupied by 1980 with 43.  Fourth place is shared by 2011 and 2008 - both with 38.

Below is a graphic showing approximate positions and tracks of the 2011 tornadoes.  Click on image for larger version.

2011 Tornado-related Fatalities and Injuries:

One fatality was attributed to the effects of tornadoes - in Marinette County.  Additionally, there was one indirectly-related fatality in the Clark County tornado when a person died after their oxygen machine shut down with the loss of electricity.  This person wasn't directly impacted by the tornado winds or falling/airborne debris.

Prior to 2011, the last tornado-related fatality in Wisconsin occurred during the F3 Stoughton tornado on August 18, 2005.

Additonally, 5 people were direclty injured by tornadoes.

2011 Tornado Monetary Loss Estimates:

Through August 30th, loss estimates are at least $50.963 Million, but this number is most likely an undercount.  The EF2 tornado that struck the city of La Crosse on May 22nd, was the costlest Wisconsin tornado in 2011 at an estimated $15.2 Million in damage. 

Counties affected by tornadoes:

Many of the tornadoes occurred in only one county, however, some individual tornadoes visited two, three, and even four counties.  Below is the breakdown of the number of tonradoes in a county:

5 - Green Lake & Price

3 - Waushara

2 - Adams, Calumet, Dane, Eau Claire, Fond du Lac, Forest, Juneau, La Crosse, Monroe, Wood & Outagamie

1 - Barron, Brown, Clark, Dodge, Douglas, Florence,  Langlade, Lincoln, Marinette, Polk, Portage, Shawano & Waupaca

Some of the 2011 tornadoes were long-tracked. 

The long-track tornadoes were about 64.5 miles in length, about 28 miles, about 21 miles, about 17 miles, about 15 miles, and about 12 miles.  The May 22nd long-tracked tornado in the counties of Monroe, Juneau, Wood, and Portage was the 16th longest tornado track in Wisconsin recorded history.  The longest-tracked tornado in Wisconsin occurred on April 5, 1929 from Pierce County into Iron County.  It's path length was about 170 miles.  That tornado killed 12 people and injured 100.

 Below is a table showing the preliminary listing for 2011...subject to change.  Click on following table for larger version.

2011 WI tor list

Wisconsin's yearly average for the period of 1981-2010 is 23.   Below is the "average" monthly breakdown:

Average 1981-2010 (Official)                
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
0.1 0.0 0.2 1.2 3.4 7.5 5.6 3.1 1.8 0.3 0.1 0.0 23.1

2011 Wisconsin Weather-related Fatalities and Injured People (only directly-related)

Numbers relect data that was passed on to the National Weather Service.  Roughly 108 people received medical treatment due to the effects of the July 17-21 heat wave.  This number is an estimate based on news reports.  







Excsv Heat









Tstm Wind






2011 Wisconsin Weather-related Monetary Loss Estimates (excluding winter weather events)

Data is only for the period of January 1, 2011 through August 30, 2011.  Numbers are likely underestimated.


Tornado property damage = $50.963 M
Tornado crop damage = $91 K
Thunderstorm Wind property damage = $9.855 M
Tstm Wind crop damage = $4.461 M
Hail property damage = $33.961 M
Hail Crop losses unknown

Total = $99.616 M

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