NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Mequon, 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 Mequon, Wisconsin since 1851, 0 of them at hurricane strength; the most recent was an unnamed storm in 1900. Since 1950, 55 tornadoes have touched down within 25 miles, 4 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 1
- Tornadoes
- 55
- EF3 or stronger
- 4
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
4 deaths in all
What the records show for Mequon
None of the 1 tropical systems was at hurricane strength as it passed Mequon; the strongest was an unnamed storm in 1900, a tropical storm with 59 mph winds when its centre passed 34 miles away. Mequon is tied for the most tropical storms and hurricanes within 75 miles among the 416 Wisconsin cities on this site. The highest rating among the 55 tornadoes within 25 miles is F4, reached 3 times; the most recent, on April 27, 1984, came within 16 miles. The deadliest, an F4 on April 4, 1981, killed 3 people. Of the 55, 3 had paths within 5 miles of the city centre, and 17 have come since 2000. July has had the most tornadoes, 14. The most recent tornado was on October 12, 2022. Of the 416 Wisconsin cities, 76% have more tornadoes within 25 miles than Mequon. Hail has been reported within 10 miles 117 times since 1960, with stones up to 3 inches (tea cup size). Mequon has more hail reports within 10 miles than 85% of the 416 Wisconsin cities.
Compare Mequon's storm record with another city →
Tropical storms and hurricanes near Mequon
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 1900 | Unnamed 1900 stormSep 11 | 34 mi | Tropical storm (59 mph) | Category 4 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Mequon: 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 Mequon
By decade
- 2020s4
- 2010s4
- 2000s9
- 1990s4
- 1980s11(2 EF3+)
- 1970s7(1 EF3+)
- 1960s14(1 EF3+)
- 1950s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Apr 4, 1981 | F4 | 18 mi | 1.8 mi | 3 / 53 |
| Apr 27, 1984 | F4 | 16 mi | 6.5 mi | 1 / 14 |
| Aug 22, 1964 | F4 | 11 mi | 2.2 mi | 0 / 30 |
| Jun 5, 1977 | F3 | 16 mi | 69.5 mi | 0 / 8 |
| Jun 1, 2000 | F2 | 23 mi | 17 mi | 0 / 0 |
| Jun 15, 1981 | F2 | 25 mi | 28.7 mi | 0 / 3 |
| Aug 4, 1980 | F2 | 5 mi | 0.1 mi | 0 / 0 |
| Apr 7, 1980 | F2 | 22 mi | 6.1 mi | 0 / 2 |
| Apr 2, 1977 | F2 | 11 mi | 9.3 mi | 0 / 2 |
| Aug 25, 1975 | F2 | 17 mi | 0.2 mi | 0 / 0 |
| Jun 29, 1969 | F2 | 23 mi | 13.1 mi | 0 / 0 |
| Jul 21, 1968 | F2 | 20 mi | 2 mi | 0 / 0 |
The strongest 12 of 55, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Mequon
The Storm Prediction Center has 117 hail reports within 10 miles of Mequon since 1960, made on 61 separate days. Of these, 64 were 1 inch across or larger, and 11 reached 2 inches. The largest, 3 inches (tea cup size), fell on June 23, 2004. The most recent report is from May 7, 2024. April and May have the most reports, 24 each.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Mequon
The nearest NOAA station with 1991–2020 climate normals is Germantown, WI, 8 miles west of Mequon at 850 feet. July is the warmest, with an average high of 81°F and low of 60°F; January is the coolest, at 27°F and 11°F. June is the wettest at 4.4 inches of precipitation on average and February the driest at 1.4 inches; the year adds up to 34.3 inches over 68 days with at least a tenth of an inch. Highs reach 90°F on about 7 days a year, almost all from June to August. Lows fall below freezing on about 156 nights a year. Snowfall averages 54.3 inches a year, most of it in January. That 34.3 inches is more than at 79 of the 165 Wisconsin stations used on this site (48%). Cedarburg, 6 miles north, has its own station (Saukville Wwtp, WI): 35.0 inches a year, 0.7 more than here, and a July average high of 79°F against 81°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 27 | 11 | 1.6 | 4 | 16.5 |
| Feb | 31 | 14 | 1.4 | 4 | 16.0 |
| Mar | 42 | 24 | 1.9 | 5 | 6.5 |
| Apr | 54 | 34 | 3.8 | 7 | 2.0 |
| May | 66 | 45 | 4.0 | 8 | 0.3 |
| Jun | 76 | 54 | 4.4 | 7 | 0.0 |
| Jul | 81 | 60 | 3.9 | 6 | 0.0 |
| Aug | 79 | 58 | 3.8 | 7 | 0.0 |
| Sep | 72 | 50 | 3.2 | 6 | 0.0 |
| Oct | 59 | 39 | 2.6 | 6 | 0.3 |
| Nov | 45 | 28 | 2.0 | 5 | 2.4 |
| Dec | 33 | 18 | 1.7 | 4 | 10.3 |
| Year | 56 | 36 | 34.3 | 68 | 54.3 |
Averages for 1991–2020 at Germantown, WI (850 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 Mequon
Since 1996, the National Weather Service has logged 152 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Mequon: 97 thunderstorm wind reports, 21 floods, 19 flash floods, 8 lightning strikes and 7 heavy rain events. They killed 2 people and injured 4, and the NWS estimated $226.2 million in property and crop damage. The strongest thunderstorm gust on record here was 82 mph, on June 29, 2025. August has had the most flash floods, 10 of 19. Of the 374 Wisconsin cities on this site with a flash flood on record, 353 have had fewer than Mequon.
August 10, 2025: flood 6 miles from the centre of Mequon — 1 killed, 1 injured, $1.0 million damage.
July 22, 2010: flash flood 5 miles from the centre of Mequon — 1 killed, $24.1 million damage.
June 28, 2008: thunderstorm wind 4 miles from the centre of Mequon — 2 injured, $500 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 Mequon's 2 ZIP codes have filed 248 claims with the National Flood Insurance Program since 1979, and were paid $2.5 million for buildings and contents, in the dollars of each year. The most came from Flooding in 1997: 48 claims (19% of all) and $299,000, then Storm in 2008 with 42 and 2025-08-MilwaukeeMetro-Flood in 2025 with 19. The year with the most claims was 2008, with 75. 49% 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, 122 have fewer than Mequon.
| Event | Claims | Paid |
|---|---|---|
| Flooding1997 | 48 | $299,000 |
| Storm2008 | 42 | $958,000 |
| 2025-08-MilwaukeeMetro-Flood2025 | 19 | $366,000 |
Ozaukee County, which includes Mequon, has been named in 13 federal disaster or emergency declarations since 1965, 10 of them major disasters (by incident: 4 floods, 4 severe storms, 2 biological emergencies, 1 hurricane). The latest major disaster declaration was Covid-19 Pandemic, on April 4, 2020. FEMA's National Risk Index gives Ozaukee County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively Low for tornadoes, hail, inland flooding, strong wind, lightning and heat waves; Very Low for hurricanes and coastal flooding. It models the county's expected loss from all 18 hazards it covers at $33.1 million a year, the 25th highest of 72 Wisconsin counties; of the hazards above, the largest share, $17.3 million (52%), 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 Mequon
- Cedarburg, WI6 mi
- Glendale, WI6 mi
- Grafton, WI7 mi
- Germantown, WI8 mi
- Menomonee Falls, WI9 mi
- Butler, WI10 mi
- Saukville, WI12 mi
- Milwaukee, WI12 mi
- Richfield, WI12 mi
- Jackson, WI12 mi
- Wauwatosa, WI12 mi
- Port Washington, WI13 mi
All Wisconsin cities →All hurricanes since 1851 →Compare Mequon with another place →