Tornadoes and Damaging Wind in Wisconsin, May 18, 1971

Name: Tornadoes and Damaging Wind in Wisconsin, May 18, 1971
Start: 1971-05-18T10:00
End: 1971-05-18T22:30
Location: Wisconsin

May 18, 1971 · 5 events in 4 counties and zones

4 tornado, 1 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

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The toll

Deaths: 0
Injuries: 5
Property damage: $525,000
Crop damage: None recorded
Events: 5

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Event by event

4 tornado, 1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Washington

When: May 18, 10:00 AM CST
Where: Washington County
Coordinates: 43.380, -88.180

Tornado, Adams

When: May 18, 4:40 PM CST
Where: Adams County
Rating: F1
Path length: 11.2 mi
Path width: 100 yd
Injuries: 5 direct, 0 indirect
Property damage: $250,000
Coordinates: 43.970, -89.770

Tornado, Waushara

When: May 18, 5:04 PM CST
Where: Waushara County
Rating: F1
Path length: 4.7 mi
Path width: 100 yd
Property damage: $250,000
Coordinates: 44.080, -89.600

Tornado, Grant

When: May 18, 8:02 PM CST
Where: Grant County
Rating: F1
Path length: 2 mi
Path width: 100 yd
Coordinates: 42.800, -90.820

Tornado, Grant

When: May 18, 10:30 PM CST
Where: Grant County
Rating: F1
Path length: 2 mi
Path width: 100 yd
Property damage: $25,000
Coordinates: 42.530, -90.550

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Tornado: A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Wisconsin in 1971 Every state in 1971 This day in weather history The tornado archive for Wisconsin, 1971

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10147837, 10147838, 10147839, 10147840, 10147841.