Thunderstorm Wind, Osceola
- When
- August 18, 7:00 PM CST
- Where
- Osceola County
- Measured
- 57 kt (66 mph)
- Coordinates
- 43.420, -95.550
Tornado and Damaging Winds in Iowa, August 18, 1990
3 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
- $2.5 million
- Crop damage
- None recorded
- Events
- 4
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
3 thunderstorm wind, 1 tornado. Local standard time, as filed.
Tornado, Dickinson
- When
- August 18, 7:10 PM CST
- Where
- Dickinson County
- Rating
- F2
- Path length
- 8.5 mi
- Path width
- 63 yd
- Property damage
- $2.5 million
- Coordinates
- 43.470, -95.270
Thunderstorm Wind, Kossuth
- When
- August 18, 8:15 PM CST
- Where
- Kossuth County
- Measured
- 55 kt (63 mph)
- Coordinates
- 43.220, -94.430
Thunderstorm Wind, Kossuth
- When
- August 18, 8:20 PM CST
- Where
- Kossuth County
- Measured
- 50 kt (58 mph)
- Coordinates
- 43.280, -94.220
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
- Hail and Damaging Winds in Oklahoma, August 18, 1990
- Hail and Damaging Winds in Texas, August 18, 1990
- Damaging Winds in Florida, August 18, 1990
- Damaging Winds in Wisconsin, August 18, 1990
- Damaging Winds in Ohio, August 18, 1990
- Hail in Montana, August 18, 1990
- Damaging Wind in Alabama, August 18, 1990
- Hail in Colorado, August 18, 1990
- Hail in California, August 18, 1990
More
Every storm in Iowa in 1990Every state in 1990This day in weather historyThe tornado archive for Iowa, 1990Warnings in Iowa, August 1990
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: 10027394, 10027395, 10027396, 10027397.