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Wisconsin · County tornado history

Grant County, Wisconsin tornadoes

NOAA’s Storm Prediction Center has recorded 62 tornadoes in Grant County, Wisconsin from 1950 through 2024, about one every 1.2 years. That ranks it 2 of 72 counties in Wisconsin with a recorded tornado. The most recent was an EF1 on July 15, 2024.

By Twisters.us · Updated · How we count

Tornadoes since 1950
62
Since 2000
21
Strongest
EF3, August 7, 2021
Most recent
EF1, July 15, 2024
Peak month
June (24)
Per 1,000 sq mi
52
FEMA tornado risk
Relatively Moderate

F0/EF0 1 2 3 4 5 · Lines run from where each tornado touched down to where it lifted; dots are short paths. Neighboring counties are outlined.

When tornadoes hit Grant County

June has brought the most, 24 of 62. About 65% touched down between 1 pm and 7 pm (Central Standard Time, as the Storm Prediction Center records it).

By decade

More tornadoes in recent decades mostly reflects better detection and reporting (Doppler radar, storm spotters, damage surveys), especially for weak EF0 tornadoes, not necessarily more storms. The 2020s bar covers only 2020 to 2024.

How strong they were

Rating Estimated 3-second gust Tornadoes
F0 / EF0 Light damage: 65 to 85 mph (EF scale) 20
F1 / EF1 Moderate: 86 to 110 mph 27
F2 / EF2 Considerable: 111 to 135 mph 12
F3 / EF3 Severe: 136 to 165 mph 3
F4 / EF4 Devastating: 166 to 200 mph 0
F5 / EF5 Incredible: over 200 mph 0

Tornadoes before February 2007 were rated on the original Fujita (F) scale; since then the National Weather Service uses the Enhanced Fujita (EF) scale. Wind speeds above are EF-scale estimates from damage, not measurements. See what the EF scale means.

The strongest tornadoes in Grant County

Date Rating Path length Path width Deaths Injuries
May 30, 1985 F3 34 mi 1,500 yd 2 27
June 19, 1993 F3 14 mi 300 yd
August 7, 2021 EF3 9.4 mi 1,100 yd
June 16, 2014 EF2 3.8 mi 100 yd 5
June 26, 1969 F2 2 mi 100 yd 2
May 25, 1957 F2 15.6 mi 400 yd
May 19, 1959 F2 4.9 mi 200 yd
July 13, 1966 F2 2.7 mi 200 yd
June 4, 1969 F2 4.1 mi 200 yd
June 4, 1969 F2 24.4 mi 200 yd

Deaths and injuries are for each tornado’s whole path, which can cross other counties.

The deadliest

The deadliest tornado to touch Grant County was an F3 on May 30, 1985. It killed 2 people and injured 27 along its 34-mile path.

Most recent tornadoes

Date Rating Path length Path width Deaths Injuries
July 15, 2024 EF1 0.3 mi 30 yd
June 22, 2024 EF0 0.2 mi 40 yd
August 7, 2021 EF3 9.4 mi 1,100 yd
August 10, 2020 EF0 0.6 mi 50 yd
March 28, 2020 EF1 6.2 mi 120 yd
June 26, 2018 EF0 0.1 mi 10 yd
May 9, 2018 EF0 1.6 mi 70 yd
June 29, 2014 EF1 8.2 mi 600 yd

The official database ends with 2024. For storms since then, see the Storm Prediction Center’s reports and your local National Weather Service office.

FEMA’s tornado risk rating

FEMA’s National Risk Index rates the tornado risk in Grant County as relatively moderate, with a score of 76 out of 100 compared with every other U.S. county. It estimates about 0.78 tornadoes a year here and an expected annual loss of about $3,114,307 to buildings, people and farming. The index mixes how often tornadoes strike with what is exposed and how well a community can recover, so a busy rural county can rate lower than a less active city.

Neighboring counties

Staying safe

When a tornado warning is issued, act at once. Go to a basement, storm shelter or safe room. With none, use a small windowless room on the lowest floor, as far from outside walls as you can, and cover your head and neck. Mobile homes and cars are not safe places to ride out a tornado: leave early for a sturdy building or shelter. Read the full tornado safety guide and the National Weather Service advice linked below.

Sources

Sources last checked 1 November 2026.

Frequently asked questions

How many tornadoes has Grant County had?

62 from 1950 through 2024 in NOAA’s Storm Prediction Center database, 21 of them since 2000.

When was the last tornado in Grant County?

The most recent in the official record was an EF1 on July 15, 2024. Later storms are not yet in the final database.

What was the strongest tornado in Grant County?

An EF3 on August 7, 2021, with a 9.4-mile path.

When is tornado season in Grant County?

June has had the most tornadoes here. Across the U.S. the peak runs from spring into early summer, and the South also sees tornadoes in late fall and winter.