Hail, Crawford
- When
- September 20, 12:01 AM CST
- Where
- Crawford County
- Measured
- 2.75 in hail
- Coordinates
- 42.130, -95.570
Tornadoes and Hail in Iowa, September 20, 1980
10 thunderstorm wind, 5 tornado, 4 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
- $10 million
- Crop damage
- None recorded
- Events
- 19
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
10 thunderstorm wind, 5 tornado, 4 hail. Local standard time, as filed.
Thunderstorm Wind, Crawford
- When
- September 20, 12:01 AM CST
- Where
- Crawford County
- Coordinates
- 42.130, -95.570
Thunderstorm Wind, Woodbury
- When
- September 20, 3:20 PM CST
- Where
- Woodbury County
- Measured
- 66 kt (76 mph)
- Coordinates
- 42.400, -96.380
Thunderstorm Wind, O'Brien
- When
- September 20, 3:25 PM CST
- Where
- O'Brien County
- Measured
- 60 kt (69 mph)
- Coordinates
- 43.100, -95.580
Thunderstorm Wind, Monona
- When
- September 20, 4:00 PM CST
- Where
- Monona County
- Measured
- 65 kt (75 mph)
- Coordinates
- 42.030, -96.100
Thunderstorm Wind, Ida
- When
- September 20, 4:15 PM CST
- Where
- Ida County
- Coordinates
- 42.350, -95.470
Hail, Clay
- When
- September 20, 4:25 PM CST
- Where
- Clay County
- Measured
- 1.75 in hail
- Coordinates
- 43.120, -95.150
Tornado, Clay
- When
- September 20, 4:30 PM CST
- Where
- Clay County
- Rating
- F3
- Path length
- 1.5 mi
- Path width
- 300 yd
- Property damage
- $25,000
- Coordinates
- 43.150, -95.150
Hail, Ida
- When
- September 20, 4:30 PM CST
- Where
- Ida County
- Measured
- 1.75 in hail
- Coordinates
- 42.350, -95.470
Thunderstorm Wind, Sac
- When
- September 20, 4:35 PM CST
- Where
- Sac County
- Measured
- 61 kt (70 mph)
- Coordinates
- 42.520, -95.080
Thunderstorm Wind, Calhoun
- When
- September 20, 5:12 PM CST
- Where
- Calhoun County
- Coordinates
- 42.530, -94.530
Tornado, Kossuth
- When
- September 20, 5:35 PM CST
- Where
- Kossuth County
- Rating
- F2
- Path length
- 5.2 mi
- Path width
- 80 yd
- Property damage
- $2.5 million
- Coordinates
- 42.920, -94.120
Tornado, Hancock
- When
- September 20, 5:45 PM CST
- Where
- Hancock County
- Rating
- F2
- Path length
- 19.3 mi
- Path width
- 33 yd
- Property damage
- $2.5 million
- Coordinates
- 42.930, -94.000
Tornado, Winnebago
- When
- September 20, 6:10 PM CST
- Where
- Winnebago County
- Rating
- F2
- Path length
- 10.2 mi
- Path width
- 60 yd
- Property damage
- $2.5 million
- Coordinates
- 43.320, -93.630
Tornado, Worth
- When
- September 20, 6:30 PM CST
- Where
- Worth County
- Rating
- F2
- Path width
- 33 yd
- Property damage
- $2.5 million
- Coordinates
- 43.430, -93.500
Thunderstorm Wind, Winnebago
- When
- September 20, 6:38 PM CST
- Where
- Winnebago County
- Coordinates
- 43.420, -93.530
Hail, Floyd
- When
- September 20, 7:25 PM CST
- Where
- Floyd County
- Measured
- 1.75 in hail
- Coordinates
- 43.130, -92.930
Thunderstorm Wind, Floyd
- When
- September 20, 7:25 PM CST
- Where
- Floyd County
- Coordinates
- 43.080, -92.930
Thunderstorm Wind, Winneshiek
- When
- September 20, 9:00 PM CST
- Where
- Winneshiek County
- Coordinates
- 43.430, -92.030
What these are
- 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.
- 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 1980Every state in 1980This day in weather historyThe tornado archive for Iowa, 1980
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: 10013711, 10013712, 10013713, 10013714, 10013715, 10013716, 10013717, 10013718, 10013719, 10013720, 10013721, 10013722, 10013723, 10013724, 10013725, 10013726, 10013727, 10013728, 10013729.