NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Mazomanie, WI
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
1 tropical system has passed within 75 miles of Mazomanie, Wisconsin since 1851, 0 of them at hurricane strength; the most recent was an unnamed storm in 1900. Since 1950, 97 tornadoes have touched down within 25 miles, 8 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 1
- Tornadoes
- 97
- EF3 or stronger
- 8
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
11 deaths in all
What the records show for Mazomanie
None of the 1 tropical systems was at hurricane strength as it passed Mazomanie; the strongest was an unnamed storm in 1900, a tropical storm with 55 mph winds when its centre passed 59 miles away. Mazomanie is tied for the most tropical storms and hurricanes within 75 miles among the 416 Wisconsin cities on this site. The strongest of the 97 tornadoes within 25 miles was an F5 on June 7, 1984; its path came within 4 miles, and it killed 9 people. Of the 97, 5 had paths within 5 miles of the city centre, and 46 have come since 2000. June has had the most tornadoes, 36. The most recent tornado was on July 16, 2025. Mazomanie has more tornadoes within 25 miles than 69% of the 416 Wisconsin cities. Hail has been reported within 10 miles 54 times since 1974, with stones up to 2 inches (hen egg size). Of the 416 Wisconsin cities, 50% have more hail reports within 10 miles than Mazomanie.
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Tropical storms and hurricanes near Mazomanie
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 1900 | Unnamed 1900 stormSep 11 | 59 mi | Tropical storm (55 mph) | Category 4 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Mazomanie: a hurricane's worst winds sit within a few dozen miles of its centre, and inland cities are usually past that.
Tornadoes within 25 miles of Mazomanie
By decade
- 2020s9
- 2010s17(1 EF3+)
- 2000s20
- 1990s7(1 EF3+)
- 1980s14(2 EF3+)
- 1970s7
- 1960s16(4 EF3+)
- 1950s7
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 7, 1984 | F5 | 4 mi | 36 mi | 9 / 200 |
| Jul 3, 1983 | F4 | 23 mi | 0.5 mi | 0 / 0 |
| Aug 2, 1967 | F3 | 17 mi | 0.1 mi | 2 / 5 |
| Jun 16, 2014 | EF3 | 17 mi | 0.96 mi | 0 / 0 |
| Jun 17, 1992 | F3 | 24 mi | 16 mi | 0 / 30 |
| Aug 16, 1963 | F3 | 9 mi | 9.6 mi | 0 / 13 |
| Aug 16, 1963 | F3 | 9 mi | 9.6 mi | 0 / 13 |
| Aug 16, 1963 | F3 | 9 mi | 9.6 mi | 0 / 13 |
| Jun 29, 2014 | EF2 | 22 mi | 5.05 mi | 0 / 0 |
| Jun 29, 2014 | EF2 | 7 mi | 29.07 mi | 0 / 0 |
| Jun 16, 2014 | EF2 | 18 mi | 0.22 mi | 0 / 0 |
| Aug 18, 2005 | F2 | 12 mi | 14.5 mi | 0 / 0 |
The strongest 12 of 97, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Mazomanie
The Storm Prediction Center has 54 hail reports within 10 miles of Mazomanie since 1974, made on 42 separate days. Of these, 36 were 1 inch across or larger, and 3 reached 2 inches. The largest size, 2 inches (hen egg size), was reported on 3 days, most recently September 18, 2010. The most recent report is from August 16, 2025. April and August have the most reports, 12 each.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Mazomanie
The nearest NOAA station with 1991–2020 climate normals is Mazomanie Wwtp, WI, 2 miles west of Mazomanie at 764 feet. July is the warmest, with an average high of 82°F and low of 58°F; January is the coolest, at 28°F and 7°F. June is the wettest at 5.6 inches of precipitation on average and February the driest at 1.3 inches; the year adds up to 35.7 inches over 66 days with at least a tenth of an inch. Highs reach 90°F on about 11 days a year, almost all from May to September. Lows fall below freezing on about 156 nights a year. Snowfall averages 30.0 inches a year, most of it in February. That 35.7 inches is more than at 111 of the 165 Wisconsin stations used on this site (67%). Sauk City, 6 miles north, has its own station (Sauk City Wwtp, WI): 36.3 inches a year, 0.6 more than here, and the same July average high, 82°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 28 | 7 | 1.5 | 4 | 7.7 |
| Feb | 33 | 10 | 1.3 | 4 | 9.5 |
| Mar | 44 | 22 | 2.3 | 5 | 4.1 |
| Apr | 58 | 33 | 3.8 | 6 | 1.0 |
| May | 70 | 45 | 4.4 | 9 | 0.0 |
| Jun | 79 | 55 | 5.6 | 8 | 0.0 |
| Jul | 82 | 58 | 3.9 | 6 | 0.0 |
| Aug | 81 | 57 | 3.3 | 5 | 0.0 |
| Sep | 74 | 47 | 2.8 | 5 | 0.0 |
| Oct | 61 | 37 | 2.9 | 6 | 0.5 |
| Nov | 46 | 26 | 2.3 | 5 | 0.7 |
| Dec | 34 | 14 | 1.6 | 5 | 6.5 |
| Year | 57 | 34 | 35.7 | 66 | 30.0 |
Averages for 1991–2020 at Mazomanie Wwtp, WI (764 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Mazomanie
Since 1996, the National Weather Service has logged 81 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Mazomanie: 58 thunderstorm wind reports, 9 flash floods, 7 floods, 6 lightning strikes and 1 heavy rain event. They killed 0 people and injured 2, and the NWS estimated $15.0 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on July 18, 2012. June has had the most flash floods, 4 of 9. Of the 374 Wisconsin cities on this site with a flash flood on record, 260 have had fewer than Mazomanie.
August 20, 2018: lightning strike 8 miles from the centre of Mazomanie — 2 injured.
August 18, 2007: flash flood in Mazomanie — $11.8 million damage.
NWS: “Although general flooding affected all of Dane County, significant flash flooding affected the community areas of Mt. Horeb, Oregon, Sun Prairie, and Dane.”
August 24, 2007: lightning strike 7 miles from the centre of Mazomanie — $1.9 million damage.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in Mazomanie's ZIP code 53560 have filed 34 claims with the National Flood Insurance Program since 1993, and were paid $1.7 million for buildings and contents, in the dollars of each year. The year with the most claims was 2018, with 23. 15% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 128 Wisconsin cities on this site with 10 or more claims, 75 have fewer than Mazomanie.
Dane County, which includes Mazomanie, has been named in 19 federal disaster or emergency declarations since 1976, 14 of them major disasters (by incident: 8 severe storms, 3 snowstorms, 2 biological emergencies, 2 floods). The latest major disaster declaration was Covid-19 Pandemic, on April 4, 2020. FEMA's National Risk Index gives Dane County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for tornadoes, hail, inland flooding, strong wind and lightning; Relatively Moderate for heat waves; Very Low for hurricanes. It models the county's expected loss from all 18 hazards it covers at $182.0 million a year, the 2nd highest of 72 Wisconsin counties; of the hazards above, the largest share, $84.0 million (46%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Mazomanie
- Black Earth, WI4 mi
- Sauk City, WI6 mi
- Cross Plains, WI8 mi
- Prairie Du Sac, WI10 mi
- Dane, WI13 mi
- Barneveld, WI13 mi
- Mount Horeb, WI13 mi
- Middleton, WI15 mi
- Spring Green, WI15 mi
- Lodi, WI15 mi
- North Freedom, WI15 mi
- Waunakee, WI16 mi
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