Tornado, Osceola
- When
- August 19, 4:30 PM CST
- Where
- Osceola County
- Rating
- F0
- Path length
- 0.2 mi
- Path width
- 30 yd
- Property damage
- $3,000
- Coordinates
- 43.300, -95.830
Tornadoes and Hail in Iowa, August 19, 1979
4 tornado, 3 thunderstorm wind, 1 hail, 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
- $53,000
- Crop damage
- None recorded
- Events
- 8
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, 3 thunderstorm wind, 1 hail. Local standard time, as filed.
Tornado, Hamilton
- When
- August 19, 6:32 PM CST
- Where
- Hamilton County
- Rating
- F1
- Path length
- 4.7 mi
- Path width
- 100 yd
- Property damage
- $25,000
- Coordinates
- 42.420, -93.870
Hail, Tama
- When
- August 19, 8:30 PM CST
- Where
- Tama County
- Measured
- 0.75 in hail
- Coordinates
- 42.000, -92.580
Tornado, Jasper
- When
- August 19, 8:32 PM CST
- Where
- Jasper County
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 30 yd
- Coordinates
- 46.150, -93.180
Thunderstorm Wind, Polk
- When
- August 19, 9:28 PM CST
- Where
- Polk County
- Measured
- 61 kt (70 mph)
- Coordinates
- 41.530, -93.670
Thunderstorm Wind, Boone
- When
- August 19, 9:47 PM CST
- Where
- Boone County
- Measured
- 61 kt (70 mph)
- Coordinates
- 42.070, -93.950
Thunderstorm Wind, Polk
- When
- August 19, 9:50 PM CST
- Where
- Polk County
- Measured
- 63 kt (72 mph)
- Coordinates
- 41.530, -93.670
Tornado, Mahaska
- When
- August 19, 10:30 PM CST
- Where
- Mahaska County
- Rating
- F1
- Path length
- 0.2 mi
- Path width
- 60 yd
- Property damage
- $25,000
- Coordinates
- 41.470, -92.670
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 Damaging Wind in New Mexico, August 19, 1979
- Tornado in Nevada, August 19, 1979
- Tornado and Damaging Winds in Oklahoma, August 19, 1979
- Damaging Winds in Texas, August 19, 1979
- Damaging Winds in North Carolina, August 19, 1979
- Tornado and Hail in Illinois, August 19, 1979
- Hail in Indiana, August 19, 1979
- Hail in Colorado, August 19, 1979
- Damaging Wind in Arkansas, August 19, 1979
More
Every storm in Iowa in 1979Every state in 1979This day in weather historyThe tornado archive for Iowa, 1979
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: 10013896, 10013897, 10013898, 10013899, 10013900, 10013901, 10013902, 10013903.