Tornado, Calhoun
- When
- August 17, 3:54 PM CST
- Where
- Calhoun County
- Rating
- F0
- Path length
- 0.4 mi
- Path width
- 13 yd
- Coordinates
- 42.280, -94.400
Tornado and Hail in Iowa, August 17, 1987
2 hail, 1 tornado, 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
- None recorded
- Crop damage
- None recorded
- Events
- 3
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
2 hail, 1 tornado. Local standard time, as filed.
Hail, Boone
- When
- August 17, 5:10 PM CST
- Where
- Boone County
- Measured
- 1.75 in hail
- Coordinates
- 42.070, -93.950
Hail, Jasper
- When
- August 17, 6:39 PM CST
- Where
- Jasper County
- Measured
- 1.5 in hail
- Coordinates
- 41.620, -93.170
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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Hail in Nebraska, August 17, 1987
- Hail and Damaging Winds in Kansas, August 17, 1987
- Hail and Damaging Winds in Oklahoma, August 17, 1987
- Damaging Winds in New York, August 17, 1987
- Damaging Wind in Georgia, August 17, 1987
- Damaging Wind in Mississippi, August 17, 1987
- Tornado in North Dakota, August 17, 1987
- Damaging Wind in Pennsylvania, August 17, 1987
- Hail in Minnesota, August 17, 1987
- Damaging Wind in Illinois, August 17, 1987
More
Every storm in Iowa in 1987Every state in 1987This day in weather historyThe tornado archive for Iowa, 1987Warnings in Iowa, August 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: 10028353, 10028354, 10028355.