NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Union Grove, 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 Union Grove, Wisconsin since 1851, 0 of them at hurricane strength; the most recent was an unnamed storm in 1900. Since 1950, 89 tornadoes have touched down within 25 miles, 3 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 1
- Tornadoes
- 89
- EF3 or stronger
- 3
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
1 deaths in all
What the records show for Union Grove
None of the 1 tropical systems was at hurricane strength as it passed Union Grove; the strongest was an unnamed storm in 1900, a tropical storm with 59 mph winds when its centre crossed the city. Union Grove 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 89 tornadoes within 25 miles is F3 or EF3, reached 3 times; the most recent, on January 7, 2008, came within 8 miles. The deadliest, an F2 on October 8, 1958, killed 1 person. Of the 89, 7 had paths within 5 miles of the city centre, and 36 have come since 2000. June has had the most tornadoes, 20. The most recent tornado was on June 22, 2024. Union Grove has more tornadoes within 25 miles than 61% of the 416 Wisconsin cities. Hail has been reported within 10 miles 66 times since 1960, with stones up to 2.5 inches (tennis ball size). Union Grove has more hail reports within 10 miles than 61% of the 416 Wisconsin cities.
Compare Union Grove's storm record with another city →
Tropical storms and hurricanes near Union Grove
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 1900 | Unnamed 1900 stormSep 11 | overhead | 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 Union Grove: 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 Union Grove
By decade
- 2020s11
- 2010s14
- 2000s11(1 EF3+)
- 1990s7
- 1980s9
- 1970s16(1 EF3+)
- 1960s13(1 EF3+)
- 1950s8
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jan 7, 2008 | EF3 | 8 mi | 10.78 mi | 0 / 15 |
| Jun 5, 1977 | F3 | 16 mi | 69.5 mi | 0 / 8 |
| Jul 19, 1963 | F3 | 13 mi | 10.6 mi | 0 / 0 |
| Oct 8, 1958 | F2 | 22 mi | 81 mi | 1 / 0 |
| Jul 22, 2010 | EF2 | 14 mi | 1 mi | 0 / 0 |
| Jun 21, 2010 | EF2 | 21 mi | 5.22 mi | 0 / 15 |
| May 18, 1997 | F2 | 19 mi | 6 mi | 0 / 0 |
| Apr 19, 1996 | F2 | 20 mi | 2 mi | 0 / 2 |
| Apr 20, 1976 | F2 | 20 mi | 0.8 mi | 0 / 2 |
| Aug 25, 1975 | F2 | 20 mi | 0.2 mi | 0 / 0 |
| Sep 28, 1972 | F2 | 9 mi | 1 mi | 0 / 0 |
| Sep 28, 1972 | F2 | 20 mi | 1.5 mi | 0 / 0 |
The strongest 12 of 89, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Union Grove
The Storm Prediction Center has 66 hail reports within 10 miles of Union Grove since 1960, made on 49 separate days. Of these, 34 were 1 inch across or larger, and one reached 2 inches. The largest, 2.5 inches (tennis ball size), fell on July 28, 2023. The most recent report is from April 18, 2025. May has the most reports, 17.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Union Grove
The nearest NOAA station with 1991–2020 climate normals is Union Grove, WI, in Union Grove at 730 feet. July is the warmest, with an average high of 81°F and low of 61°F; January is the coolest, at 28°F and 12°F. June is the wettest at 4.5 inches of precipitation on average and February the driest at 1.5 inches; the year adds up to 35.2 inches over 70 days with at least a tenth of an inch. Highs reach 90°F on about 9 days a year, almost all from June to August. Lows fall below freezing on about 145 nights a year. Snowfall averages 40.5 inches a year, most of it in January. That 35.2 inches is more than at 99 of the 165 Wisconsin stations used on this site (60%). Mount Pleasant, 9 miles east, has its own station (Racine Batten Airport, WI): 31.9 inches a year, 3.3 less than here, and the same July average high, 81°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 28 | 12 | 1.8 | 5 | 13.0 |
| Feb | 32 | 15 | 1.5 | 4 | 11.0 |
| Mar | 43 | 25 | 2.1 | 5 | 4.9 |
| Apr | 55 | 35 | 3.5 | 7 | 1.7 |
| May | 66 | 45 | 4.1 | 8 | 0.0 |
| Jun | 76 | 56 | 4.5 | 7 | 0.0 |
| Jul | 81 | 61 | 3.5 | 6 | 0.0 |
| Aug | 79 | 58 | 3.8 | 7 | 0.0 |
| Sep | 72 | 50 | 3.4 | 6 | 0.0 |
| Oct | 60 | 39 | 2.9 | 6 | 0.1 |
| Nov | 45 | 28 | 2.4 | 5 | 2.1 |
| Dec | 34 | 18 | 1.7 | 5 | 7.7 |
| Year | 56 | 37 | 35.2 | 70 | 40.5 |
Averages for 1991–2020 at Union Grove, WI (730 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 Union Grove
Since 1996, the National Weather Service has logged 103 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Union Grove: 82 thunderstorm wind reports, 11 flash floods, 5 lightning strikes, 3 floods and 2 heavy rain events. They killed 1 person and injured 5, and the NWS estimated $8.6 million in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on July 21, 1998. Of the 374 Wisconsin cities on this site with a flash flood on record, 293 have had fewer than Union Grove.
September 26, 2011: flood 4 miles from the centre of Union Grove — 1 killed, $7,000 damage.
June 8, 2011: thunderstorm wind 6 miles from the centre of Union Grove — 2 injured.
July 18, 2010: thunderstorm wind 8 miles from the centre of Union Grove — 1 injured, $25,000 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
Racine County, which includes Union Grove, has been named in 17 federal disaster or emergency declarations since 1969, 12 of them major disasters (by incident: 6 severe storms, 4 floods, 4 snowstorms, 2 biological emergencies). The latest major disaster declaration was Severe Storms, Tornadoes, and Flooding, on June 30, 2026. FEMA's National Risk Index gives Racine County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for tornadoes, strong wind and lightning; Relatively Moderate for hail, inland flooding and heat waves; Very Low for hurricanes and coastal flooding. It models the county's expected loss from all 18 hazards it covers at $63.8 million a year, the 8th highest of 72 Wisconsin counties; of the hazards above, the largest share, $30.4 million (48%), 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.