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.
Tornado F3 Tornado
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…
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.
Snow accumulation of 3-4 inches. Two fatalities occurred in a snow related vehicle accident.
A motorist lost control on icy highway CW in Ixonia, and crossed the centerline striking another vehicle. One motorist was killed.
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.
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…
Lightning struck and killed a boy watching the storms outside. He lived on Ebenezer Road in the Civil Town of Watertown.
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…
Hail sizes ranged from 1.00 to 2.50 inches in diameter.
Winter Weather Winter Weather
Snow accumulation of 1-2 inches. Westerly wind gusts around 35 mph.
Winter Weather Winter Weather
Wind chill temperatures 20 below to 26 below zero.
Winter Weather Winter Weather
Snow accumulation of a trace to 3 inches with a glaze of ice accumulation.
Winter Weather Winter Weather
Snow accumulation of 2-4 inches.
Winter Storm Winter Storm
Snow accumulation of 9-13 inches.
Thunderstorm Wind Thunderstorm Wind
Law enforcement reports several trees down.
Thunderstorm Wind Thunderstorm Wind
Uprooted tree north of Sullivan. Other minor tree branches down in the city.
Heat Heat
Maximum heat index values of 99-104 degrees Fahrenheit and minimums in the middle to upper 70s.
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail size measured around 2.34 inches in diameter.
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Hail Hail
Thunderstorm Wind Thunderstorm Wind
Several reports of tree and powerline damage in the Waterloo area.
Thunderstorm Wind Thunderstorm Wind
Public report of three uprooted trees and a toppled shed.
Thunderstorm Wind Thunderstorm Wind
Public report of three uprooted trees and a toppled shed.
Thunderstorm Wind Thunderstorm Wind
Public report of eight uprooted trees and roof damage to a garage 4 miles west of Watertown.
Thunderstorm Wind Thunderstorm Wind
Numerous trees down between Sullivan and Oconomowoc.
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
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 33 | 0 |
| 2024 | 25 | 5 |
| 2023 | 29 | 3 |
| 2022 | 34 | 3 |
| 2021 | 22 | 4 |
| 2020 | 11 | 0 |
| 2019 | 37 | 2 |
| 2018 | 33 | 0 |
| 2017 | 33 | 0 |
| 2016 | 24 | 0 |
| 2015 | 13 | 0 |
| 2014 | 24 | 0 |
| 2013 | 29 | 0 |
| 2012 | 49 | 0 |
| 2011 | 34 | 0 |
| 2010 | 40 | 5 |
| 2009 | 21 | 0 |
| 2008 | 54 | 1 |
| 2007 | 43 | 0 |
| 2006 | 47 | 0 |
| 2005 | 43 | 7 |
| 2004 | 36 | 2 |
| 2003 | 26 | 0 |
| 2002 | 20 | 1 |
| 2001 | 37 | 0 |
| 2000 | 36 | 0 |
| 1999 | 26 | 1 |
| 1998 | 19 | 0 |
| 1997 | 26 | 0 |
| 1996 | 20 | 0 |
| 1995 | 16 | 0 |
| 1994 | 7 | 0 |
| 1992 | 1 | 0 |
| 1991 | 9 | 1 |
| 1990 | 4 | 0 |
| 1989 | 6 | 0 |
| 1988 | 5 | 1 |
| 1987 | 4 | 0 |
| 1986 | 4 | 2 |
| 1985 | 2 | 0 |
| 1984 | 4 | 0 |
| 1983 | 8 | 0 |
| 1982 | 2 | 0 |
| 1981 | 4 | 1 |
| 1980 | 5 | 2 |
| 1979 | 4 | 1 |
| 1978 | 6 | 0 |
| 1977 | 9 | 0 |
| 1976 | 1 | 0 |
| 1975 | 2 | 0 |
| 1974 | 5 | 1 |
| 1972 | 4 | 2 |
| 1971 | 2 | 2 |
| 1970 | 1 | 0 |
| 1967 | 1 | 1 |
| 1966 | 2 | 0 |
| 1965 | 3 | 1 |
| 1964 | 3 | 0 |
| 1962 | 2 | 0 |
| 1961 | 3 | 0 |
| 1960 | 5 | 0 |
| 1956 | 1 | 0 |