Thunderstorm Wind, Dubuque
- When
- June 17, 12:20 AM CST
- Where
- Dubuque County
- Coordinates
- 42.500, -90.670
Tornado and Hail in Iowa, June 17, 1978
6 hail, 5 thunderstorm wind, 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
- $25,000
- 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
6 hail, 5 thunderstorm wind, 1 tornado. Local standard time, as filed.
Hail, Woodbury
- When
- June 17, 4:25 AM CST
- Where
- Woodbury County
- Measured
- 2 in hail
- Coordinates
- 42.500, -96.380
Hail, Ida
- When
- June 17, 5:20 AM CST
- Where
- Ida County
- Measured
- 4.5 in hail
- Coordinates
- 42.350, -95.470
Hail, Warren
- When
- June 17, 9:00 AM CST
- Where
- Warren County
- Measured
- 2.75 in hail
- Coordinates
- 42.380, -93.530
Thunderstorm Wind, Clayton
- When
- June 17, 9:58 AM CST
- Where
- Clayton County
- Coordinates
- 42.750, -91.120
Thunderstorm Wind, Fayette
- When
- June 17, 10:30 AM CST
- Where
- Fayette County
- Coordinates
- 42.730, -90.150
Hail, Jasper
- When
- June 17, 3:30 PM CST
- Where
- Jasper County
- Measured
- 1.75 in hail
- Coordinates
- 41.670, -92.780
Tornado, Mahaska
- When
- June 17, 4:00 PM CST
- Where
- Mahaska County
- Rating
- F1
- Path length
- 0.1 mi
- Path width
- 10 yd
- Property damage
- $25,000
- Coordinates
- 41.380, -92.650
Hail, Clayton
- When
- June 17, 5:00 PM CST
- Where
- Clayton County
- Measured
- 0.75 in hail
- Coordinates
- 42.720, -91.000
Thunderstorm Wind, Mahaska
- When
- June 17, 5:15 PM CST
- Where
- Mahaska County
- Coordinates
- 41.470, -92.670
Hail, Louisa
- When
- June 17, 6:50 PM CST
- Where
- Louisa County
- Measured
- 0.75 in hail
- Coordinates
- 41.280, -91.200
Thunderstorm Wind, Washington
- When
- June 17, 6:50 PM CST
- Where
- Washington County
- Measured
- 52 kt (60 mph)
- Coordinates
- 41.280, -91.570
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.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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
More
Every storm in Iowa in 1978Every state in 1978This day in weather historyThe tornado archive for Iowa, 1978
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: 10012694, 10012695, 10012696, 10012697, 10012698, 10012699, 10012700, 10012701, 10012702, 10012703, 10012704, 10012705.