Oconomowoc, WI Tornado History — 121 Tornadoes Since 1950
How many tornadoes has Oconomowoc, WI had?
Oconomowoc has had 121 tornadoes on record within 25 miles since 1950, including 3 strong to violent (EF3+) tornadoes.
When was the most recent tornado near Oconomowoc?
The most recent tornado within 25 miles of Oconomowoc was an EF0 on July 16, 2025.
When is tornado season in Oconomowoc?
June is historically the peak month for tornadoes near Oconomowoc, with 32 on record. April through June account for 54 of the 121 tornadoes on record near Oconomowoc.
At a Glance
Recent Tornado Activity Near Oconomowoc
The last 20 years of confirmed tornadoes within 25 miles — 40 total, averaging 2.0 per year over this window.
Preliminary tornado reports near Oconomowoc since December 29, 2025
These are 3 preliminary reports, not confirmed tornadoes. They have not yet been through an NWS damage survey, and are not counted in the confirmed totals above.
Preliminary reports are revised, merged, and sometimes withdrawn — historically about 23% are consolidated downward once surveys complete. Ratings are omitted until a survey assigns one.
Confirmed records above are complete through December 29, 2025. NOAA publishes the confirmed archive annually, so tornadoes after that date appear here first and move into the totals above once finalized.
NWS storm survey finds a brief EF0 tornado damage track beginning near the intersection of Elmwood Rd & Timber Stone Way. Max wind speed 80 MPH. Additional details to f (MKX)
NWS Damage Survey concludes an EF-0 tornado occurred with estimated peak winds of 70 mph and a path width of 70 yards. This tornado began at the intersection of Wiscons (MKX)
Radar confirmed tornadic debris signature at this location. Multiple roofs ripped off a commercial facility reported by law enforcement. Siding damage to nearby church. (MKX)
Within 25 miles of Oconomowoc. Quoted text is the report narrative exactly as filed. Source: NOAA Storm Prediction Center preliminary storm reports, updated daily.
What storm spotters reported near Oconomowoc
2 local storm reports have been filed within 25 miles of Oconomowoc and since confirmed into the NOAA archive, the earliest on May 15, 2025 and the most recent on July 16, 2025. They are already counted in the Oconomowoc totals above; quoted below is the narrative each reporting office filed at the time.
(MKX)
A NWS story survey found EF-1 rated damage from a tornado that began near the Dodge County Airport... north of Juneau. This tornado proceeded to the east before ending (MKX)
Source: National Weather Service and trained-spotter local storm reports, relayed by the NOAA Storm Prediction Center.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Casualties on Record Near Oconomowoc
5 fatalities have been recorded within 25 miles of Oconomowoc since 1950, across 3 events. 91 injuries have been reported across all events. 1965 was the deadliest year on record near Oconomowoc.
The deadliest single event was an F2 on April 11, 1965, which caused 3 fatalities along a 14.5-mile track.
Notable Tornadoes Near Oconomowoc
What the record shows near Oconomowoc
The 1980s were the busiest decade near Oconomowoc, with 26 of the 121 confirmed tornadoes within 25 miles; the 2020s have produced 22 so far. The Oconomowoc record runs from the 1950s to today.
Of the tornadoes rated near Oconomowoc, 93 reached EF0 or EF1 and 28 reached EF2 or stronger. The most intense on record near Oconomowoc is rated EF4, of which 1 is logged.
Across the last 20 years Oconomowoc has averaged 2.0 confirmed tornadoes a year within 25 miles, 40 in total. 2021 was the busiest of them with 7, and 7 of those years passed with none at all.