Tornado, O'Brien
- When
- May 5, 2:30 PM CST
- Where
- O'Brien County
- Rating
- F2
- Path length
- 21.8 mi
- Path width
- 33 yd
- Property damage
- $3,000
- Coordinates
- 43.170, -95.480
Tornadoes and Hail in Iowa, May 5, 1965
7 tornado, 1 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
- 11
- Property damage
- $153,000
- Crop damage
- None recorded
- Events
- 9
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 tornado, 1 thunderstorm wind, 1 hail. Local standard time, as filed.
Tornado, Calhoun
- When
- May 5, 4:15 PM CST
- Where
- Calhoun County
- Rating
- F4
- Path length
- 9.9 mi
- Path width
- 200 yd
- Property damage
- $25,000
- Coordinates
- 42.300, -94.470
Thunderstorm Wind, Webster
- When
- May 5, 4:30 PM CST
- Where
- Webster County
- Coordinates
- 42.380, -94.000
Hail, Wright
- When
- May 5, 5:00 PM CST
- Where
- Wright County
- Measured
- 1.5 in hail
- Coordinates
- 42.580, -93.900
Tornado, Floyd
- When
- May 5, 8:00 PM CST
- Where
- Floyd County
- Rating
- F4
- Path length
- 8.2 mi
- Path width
- 150 yd
- Injuries
- 6 direct, 0 indirect
- Property damage
- $25,000
- Coordinates
- 43.280, -92.820
Tornado, Floyd
- When
- May 5, 8:18 PM CST
- Where
- Floyd County
- Rating
- F4
- Path length
- 7.9 mi
- Path width
- 150 yd
- Property damage
- $25,000
- Coordinates
- 43.380, -92.720
Tornado, Howard
- When
- May 5, 8:34 PM CST
- Where
- Howard County
- Rating
- F4
- Path length
- 19.9 mi
- Path width
- 200 yd
- Injuries
- 5 direct, 0 indirect
- Property damage
- $25,000
- Coordinates
- 43.380, -92.550
Tornado, Howard
- When
- May 5, 9:16 PM CST
- Where
- Howard County
- Rating
- F4
- Path length
- 3.3 mi
- Path width
- 200 yd
- Property damage
- $25,000
- Coordinates
- 43.380, -92.150
Tornado, Winneshiek
- When
- May 5, 9:24 PM CST
- Where
- Winneshiek County
- Rating
- F4
- Path length
- 2.3 mi
- Path width
- 200 yd
- Property damage
- $25,000
- Coordinates
- 43.420, -92.080
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.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
More
Every storm in Iowa in 1965Every state in 1965This day in weather historyThe tornado archive for Iowa, 1965
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: 10013639, 10013640, 10013641, 10013642, 10013643, 10013644, 10013645, 10013646, 10013647.