Tornado, Pottawattamie
- When
- May 31, 2:38 PM CST
- Where
- Pottawattamie County
- Rating
- F1
- Path length
- 3 mi
- Path width
- 20 yd
- Property damage
- $3,000
- Coordinates
- 41.480, -95.200
Tornadoes and Hail in Iowa, May 31, 1987
8 hail, 3 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $8,000
- Crop damage
- None recorded
- Events
- 12
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
8 hail, 3 tornado, 1 thunderstorm wind. Local standard time, as filed.
Hail, Union
- When
- May 31, 2:40 PM CST
- Where
- Union County
- Measured
- 0.75 in hail
- Coordinates
- 41.070, -94.370
Tornado, Cass
- When
- May 31, 2:44 PM CST
- Where
- Cass County
- Rating
- F1
- Path length
- 5 mi
- Path width
- 20 yd
- Property damage
- $3,000
- Coordinates
- 41.470, -95.130
Hail, Audubon
- When
- May 31, 3:23 PM CST
- Where
- Audubon County
- Measured
- 1.75 in hail
- Coordinates
- 41.580, -94.880
Tornado, Dallas
- When
- May 31, 3:40 PM CST
- Where
- Dallas County
- Rating
- F0
- Path length
- 1 mi
- Path width
- 20 yd
- Property damage
- $3,000
- Coordinates
- 41.730, -94.030
Hail, Guthrie
- When
- May 31, 3:44 PM CST
- Where
- Guthrie County
- Measured
- 1.75 in hail
- Coordinates
- 41.580, -94.500
Hail, Clarke
- When
- May 31, 3:49 PM CST
- Where
- Clarke County
- Measured
- 0.75 in hail
- Coordinates
- 41.050, -93.970
Hail, Clarke
- When
- May 31, 4:12 PM CST
- Where
- Clarke County
- Measured
- 1 in hail
- Coordinates
- 41.030, -93.780
Hail, Lucas
- When
- May 31, 5:10 PM CST
- Where
- Lucas County
- Measured
- 0.75 in hail
- Coordinates
- 41.020, -93.320
Hail, Monroe
- When
- May 31, 5:26 PM CST
- Where
- Monroe County
- Measured
- 0.75 in hail
- Coordinates
- 40.970, -93.030
Thunderstorm Wind, Lucas
- When
- May 31, 5:30 PM CST
- Where
- Lucas County
- Measured
- 52 kt (60 mph)
- Coordinates
- 41.030, -93.470
Hail, Appanoose
- When
- May 31, 7:38 PM CST
- Where
- Appanoose County
- Measured
- 0.88 in hail
- Coordinates
- 40.820, -93.050
What these are
- 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.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Hail in Vermont, May 31, 1987
- Tornado and Hail in Oklahoma, May 31, 1987
- Damaging Winds in Maine, May 31, 1987
- Hail and Damaging Winds in Illinois, May 31, 1987
- Tornado and Damaging Winds in Texas, May 31, 1987
- Damaging Winds in New Hampshire, May 31, 1987
- Hail and Damaging Wind in Missouri, May 31, 1987
- Damaging Winds in Arkansas, May 31, 1987
- Damaging Winds in Massachusetts, May 31, 1987
- Damaging Wind in New York, May 31, 1987
- Damaging Wind in Kentucky, May 31, 1987
- Hail in Kansas, May 31, 1987
More
Every storm in Iowa in 1987Every state in 1987This day in weather historyThe tornado archive for Iowa, 1987Warnings in Iowa, May 1987
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: 10012029, 10012030, 10012031, 10012032, 10012033, 10012034, 10012035, 10012036, 10012037, 10012038, 10012039, 10012040.