Beaver Dam, WI Tornado History — 148 Tornadoes Since 1950
How many tornadoes has Beaver Dam, WI had?
Beaver Dam has had 148 tornadoes on record within 25 miles since 1950, including 12 strong to violent (EF3+) tornadoes.
When was the most recent tornado near Beaver Dam?
The most recent tornado within 25 miles of Beaver Dam was an EF0 on July 16, 2025.
When is tornado season in Beaver Dam?
June is historically the peak month for tornadoes near Beaver Dam, with 47 on record. April through June account for 82 of the 148 tornadoes on record near Beaver Dam.
At a Glance
Recent Tornado Activity Near Beaver Dam
The last 20 years of confirmed tornadoes within 25 miles — 49 total, averaging 2.5 per year over this window.
Preliminary tornado reports near Beaver Dam since December 29, 2025
These are 2 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Preliminary reports are revised, merged, and sometimes withdrawn — historically about 23% are consolidated downward once surveys complete.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.
National Weather Service Storm Survey confirms a tornado rated EF-0 in Lomira. Several homes and mobile homes sustained roof damage... numerous trees were damaged... a (MKX)
NWS Storm Survey found EF0 tornado damage south of Beaver Dam. A brief tornado with maximum winds of 85 MPH. Attached garage and part of house roof lofted approximately (MKX)
Within 25 miles of Beaver Dam. Quoted text is the report narrative exactly as filed. Source: NOAA Storm Prediction Center preliminary storm reports, updated daily.
What storm spotters reported near Beaver Dam
4 local storm reports have been filed within 25 miles of Beaver Dam 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 Beaver Dam totals above; quoted below is the narrative each reporting office filed at the time.
(MKX)
Video from US HWY 151 looking W. (MKX)
A NWS storm survey found EF-1 rated damage from a brief tornado southwest of Lomira. This tornado had an estimated path length of 0.5 miles and a peak wind of 95 MPH. (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 Beaver Dam
7 fatalities have been recorded within 25 miles of Beaver Dam since 1950, across 4 events. 149 injuries have been reported across all events. 1965 was the deadliest year on record near Beaver Dam.
The deadliest single event was an F2 on April 11, 1965, which caused 3 fatalities along a 14.5-mile track.
Notable Tornadoes Near Beaver Dam
What the record shows near Beaver Dam
The 1980s were the busiest decade near Beaver Dam, with 35 of the 148 confirmed tornadoes within 25 miles; the 2020s have produced 15 so far. The Beaver Dam record runs from the 1950s to today.
Of the tornadoes rated near Beaver Dam, 114 reached EF0 or EF1 and 34 reached EF2 or stronger. The most intense on record near Beaver Dam is rated EF5, of which 1 is logged.
Across the last 20 years Beaver Dam has averaged 2.5 confirmed tornadoes a year within 25 miles, 49 in total. 2008 was the busiest of them with 11, and 9 of those years passed with none at all.