Hail,
- When
- May 11, 10:52 AM CST
- Where
- County
- Measured
- 0.75 in hail
- Coordinates
- 42.380, -96.400
Hail and Damaging Winds in Iowa, May 11, 1970
7 hail, 4 thunderstorm wind, 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
- 11
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
7 hail, 4 thunderstorm wind. Local standard time, as filed.
Hail, Osceola
- When
- May 11, 11:00 AM CST
- Where
- Osceola County
- Measured
- 1.25 in hail
- Coordinates
- 43.380, -95.780
Thunderstorm Wind, O'Brien
- When
- May 11, 11:00 AM CST
- Where
- O'Brien County
- Coordinates
- 43.200, -95.680
Thunderstorm Wind, Plymouth
- When
- May 11, 11:00 AM CST
- Where
- Plymouth County
- Coordinates
- 42.780, -96.180
Hail, Buena Vista
- When
- May 11, 12:25 PM CST
- Where
- Buena Vista County
- Measured
- 1 in hail
- Coordinates
- 42.880, -95.000
Hail, Pocahontas
- When
- May 11, 12:40 PM CST
- Where
- Pocahontas County
- Measured
- 1.75 in hail
- Coordinates
- 42.700, -94.680
Hail, Pocahontas
- When
- May 11, 12:40 PM CST
- Where
- Pocahontas County
- Measured
- 1.75 in hail
- Coordinates
- 42.780, -94.780
Hail, Benton
- When
- May 11, 6:30 PM CST
- Where
- Benton County
- Measured
- 4 in hail
- Coordinates
- 42.280, -92.180
Hail, Pottawattamie
- When
- May 11, 7:21 PM CST
- Where
- Pottawattamie County
- Measured
- 1 in hail
- Coordinates
- 41.500, -95.280
Thunderstorm Wind, Cass
- When
- May 11, 8:25 PM CST
- Where
- Cass County
- Coordinates
- 41.380, -95.000
Thunderstorm Wind, O'Brien
- When
- May 11, 10:00 PM CST
- Where
- O'Brien County
- Coordinates
- 43.080, -95.780
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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
More
Every storm in Iowa in 1970Every state in 1970This day in weather history
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: 10014632, 10014633, 10014634, 10014635, 10014636, 10014637, 10014638, 10014639, 10014640, 10014641, 10014642.