TornadoLookup
HomeStatesWisconsin

Jefferson storm history

Storm events recorded in Jefferson, Wisconsin between 1950 and 2025.

1,059
Total events
49
Tornadoes
168
Hail
55
Floods
15
Deaths
$138.7M
Property damage

Most significant events

Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.

June 5, 1980 · Jefferson, Wisconsin
Tornado F3 Tornado
January 25, 2023 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death
Snow accumulation of 1-2 inches. A woman died in a traffic accident around 7:40 AM CDT on highway 12 northeast of Fort Atkinson ,when her car crossed into the oncoming lane and struck a truck. Law enforcement determined a shallow covering of snow on the road was a factor in the c…
November 24, 2020 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death
One to two inches of snow accumulation. One indirect death from a car accident when one vehicle slid into an oncoming vehicle on slippery highway 12 in the Town of Oakland.
January 24, 2020 · Jefferson, Wisconsin
Winter Weather Winter Weather2 deaths, 1 injury
Snow accumulation of 3-4 inches. Two fatalities occurred in a snow related vehicle accident.
March 2, 2017 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death
A motorist lost control on icy highway CW in Ixonia, and crossed the centerline striking another vehicle. One motorist was killed.
January 4, 2016 · Jefferson, Wisconsin
Cold/Wind Chill Cold/Wind Chill1 death
The Jefferson County Medical Examiner reported a death of man due to hypothermia. The man was found lying in his front yard at daybreak. It is unknown how many hours the man was lying in the snow. Temperatures were in the 20s Fahrenheit during the morning.
December 29, 2011 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death
December 20, 2010 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death, 3 injuries
Light snow began falling late in the afternoon of Monday, December 20th and continued through the night into the morning of Tuesday, December 21st. Light freezing drizzle mixed in with the snow, creating a light glaze on untreated surfaces. Snowfall totals around 2 inches were re…
February 26, 2009 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death
November 24, 2008 · Jefferson, Wisconsin
Winter Weather Winter Weather1 death
July 7, 2008 · Jefferson, Wisconsin
Lightning Lightning1 death
Lightning struck and killed a boy watching the storms outside. He lived on Ebenezer Road in the Civil Town of Watertown.
April 11, 2007 · Jefferson, Wisconsin
Winter Storm Winter Storm1 death
April 11, 1965 · Jefferson, Wisconsin
Tornado F2 Tornado3 deaths, 28 injuries, $2.5M damage
May 31, 1998 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind8 injuries, $2.7M damage
June 8, 2008 · Jefferson, Wisconsin
Flash Flood Flash Flood$102.2M damage
Heavy rains resulted in flash flooding across much of Jefferson County. Water depths on road surfaces reached 3 feet or more and there were gravel washouts. The rain on June 12th ultimately lead to record-setting crests on the Rock and Crawfish Rivers, and many farm fields remain…
April 13, 2006 · Jefferson, Wisconsin
Hail Hail$4.4M damage
April 13, 2006 · Jefferson, Wisconsin
Hail Hail$4.4M damage
Hail sizes ranged from 1.00 to 2.50 inches in diameter.
April 13, 2006 · Jefferson, Wisconsin
Hail Hail$4.4M damage
June 1, 2004 · Jefferson, Wisconsin
Flood Flood$2.6M damage
March 27, 1991 · Jefferson, Wisconsin
Tornado F2 Tornado$2.5M damage
September 28, 1986 · Jefferson, Wisconsin
Tornado F2 Tornado1 injury, $2.5M damage
December 28, 2025 · Jefferson, Wisconsin
Winter Weather Winter Weather
Snow accumulation of 1-2 inches. Westerly wind gusts around 35 mph.
December 14, 2025 · Jefferson, Wisconsin
Winter Weather Winter Weather
Wind chill temperatures 20 below to 26 below zero.
December 9, 2025 · Jefferson, Wisconsin
Winter Weather Winter Weather
Snow accumulation of a trace to 3 inches with a glaze of ice accumulation.
December 6, 2025 · Jefferson, Wisconsin
Winter Weather Winter Weather
Snow accumulation of 2-4 inches.
November 29, 2025 · Jefferson, Wisconsin
Winter Storm Winter Storm
Snow accumulation of 9-13 inches.
September 22, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Law enforcement reports several trees down.
August 12, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Uprooted tree north of Sullivan. Other minor tree branches down in the city.
June 21, 2025 · Jefferson, Wisconsin
Heat Heat
Maximum heat index values of 99-104 degrees Fahrenheit and minimums in the middle to upper 70s.
May 15, 2025 · Jefferson, Wisconsin
Hail Hail
May 15, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
Hail size measured around 2.34 inches in diameter.
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
April 18, 2025 · Jefferson, Wisconsin
Hail Hail
March 14, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Several reports of tree and powerline damage in the Waterloo area.
March 14, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Public report of three uprooted trees and a toppled shed.
March 14, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Public report of three uprooted trees and a toppled shed.
March 14, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Public report of eight uprooted trees and roof damage to a garage 4 miles west of Watertown.
March 14, 2025 · Jefferson, Wisconsin
Thunderstorm Wind Thunderstorm Wind
Numerous trees down between Sullivan and Oconomowoc.
February 17, 2025 · Jefferson, Wisconsin
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Widespread wind chills between -25 and -30 observed countywide. Minimum wind chill of -29 observed at the Watertown AWOS.

Events by year

YearEventsTornadoes
2025330
2024255
2023293
2022343
2021224
2020110
2019372
2018330
2017330
2016240
2015130
2014240
2013290
2012490
2011340
2010405
2009210
2008541
2007430
2006470
2005437
2004362
2003260
2002201
2001370
2000360
1999261
1998190
1997260
1996200
1995160
199470
199210
199191
199040
198960
198851
198740
198642
198520
198440
198380
198220
198141
198052
197941
197860
197790
197610
197520
197451
197242
197122
197010
196711
196620
196531
196430
196220
196130
196050
195610