Tornado, Plymouth
- When
- May 8, 11:45 AM CST
- Where
- Plymouth County
- Rating
- F3
- Path length
- 9.3 mi
- Path width
- 200 yd
- Property damage
- $25,000
- Coordinates
- 42.780, -96.170
Tornadoes and Damaging Winds in Iowa, May 8, 1964
2 tornado, 2 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
- $50,000
- 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
2 tornado, 2 thunderstorm wind. Local standard time, as filed.
Tornado, Osceola
- When
- May 8, 12:35 PM CST
- Where
- Osceola County
- Rating
- F2
- Path length
- 5.1 mi
- Path width
- 200 yd
- Property damage
- $25,000
- Coordinates
- 43.430, -95.430
Thunderstorm Wind, Dubuque
- When
- May 8, 5:30 PM CST
- Where
- Dubuque County
- Measured
- 67 kt (77 mph)
- Coordinates
- 42.500, -90.680
Thunderstorm Wind, Dubuque
- When
- May 8, 8:15 PM CST
- Where
- Dubuque County
- Measured
- 68 kt (78 mph)
- Coordinates
- 42.500, -90.680
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.
- 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
- Tornadoes and Damaging Winds in Michigan, May 8, 1964
- Tornadoes and Hail in Wisconsin, May 8, 1964
- Tornadoes in South Dakota, May 8, 1964
- Damaging Winds in Illinois, May 8, 1964
- Tornado and Hail in Texas, May 8, 1964
- Tornado in Kansas, May 8, 1964
- Hail in Oklahoma, May 8, 1964
- Damaging Wind in Minnesota, May 8, 1964
More
Every storm in Iowa in 1964Every state in 1964This day in weather historyThe tornado archive for Iowa, 1964
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: 10012167, 10012168, 10012169, 10012170.