Thunderstorm Wind, Lyon
- When
- July 1, 8:15 PM CST
- Where
- Lyon County
- Coordinates
- 43.300, -96.300
Tornado and Damaging Winds in Iowa, July 1, 1973
19 thunderstorm wind, 1 tornado, 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
- $25,000
- Crop damage
- None recorded
- Events
- 20
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
19 thunderstorm wind, 1 tornado. Local standard time, as filed.
Thunderstorm Wind, Sioux
- When
- July 1, 8:45 PM CST
- Where
- Sioux County
- Coordinates
- 43.000, -96.000
Thunderstorm Wind, Sioux
- When
- July 1, 8:45 PM CST
- Where
- Sioux County
- Measured
- 65 kt (75 mph)
- Coordinates
- 43.100, -96.200
Thunderstorm Wind, O'Brien
- When
- July 1, 9:10 PM CST
- Where
- O'Brien County
- Coordinates
- 43.100, -95.600
Thunderstorm Wind,
- When
- July 1, 9:23 PM CST
- Where
- County
- Measured
- 53 kt (61 mph)
- Coordinates
- 42.400, -96.380
Thunderstorm Wind, Carroll
- When
- July 1, 10:45 PM CST
- Where
- Carroll County
- Coordinates
- 42.000, -94.900
Thunderstorm Wind, Greene
- When
- July 1, 11:00 PM CST
- Where
- Greene County
- Coordinates
- 42.020, -94.380
Thunderstorm Wind, Hamilton
- When
- July 1, 11:00 PM CST
- Where
- Hamilton County
- Coordinates
- 42.300, -93.900
Thunderstorm Wind, Boone
- When
- July 1, 11:10 PM CST
- Where
- Boone County
- Coordinates
- 42.000, -93.900
Thunderstorm Wind, Story
- When
- July 1, 11:15 PM CST
- Where
- Story County
- Coordinates
- 42.000, -93.600
Thunderstorm Wind, Dallas
- When
- July 1, 11:15 PM CST
- Where
- Dallas County
- Coordinates
- 41.830, -94.080
Tornado, Story
- When
- July 1, 11:15 PM CST
- Where
- Story County
- Rating
- F1
- Path width
- 33 yd
- Property damage
- $25,000
- Coordinates
- 41.980, -93.620
Thunderstorm Wind, Dallas
- When
- July 1, 11:20 PM CST
- Where
- Dallas County
- Coordinates
- 41.800, -93.900
Thunderstorm Wind, Story
- When
- July 1, 11:30 PM CST
- Where
- Story County
- Coordinates
- 42.000, -93.300
Thunderstorm Wind, Hardin
- When
- July 1, 11:30 PM CST
- Where
- Hardin County
- Coordinates
- 42.500, -93.300
Thunderstorm Wind, Cerro Gordo
- When
- July 1, 11:35 PM CST
- Where
- Cerro Gordo County
- Measured
- 58 kt (67 mph)
- Coordinates
- 43.150, -93.330
Thunderstorm Wind, Grundy
- When
- July 1, 11:45 PM CST
- Where
- Grundy County
- Coordinates
- 42.300, -92.800
Thunderstorm Wind, Marshall
- When
- July 1, 11:50 PM CST
- Where
- Marshall County
- Coordinates
- 42.100, -92.900
Thunderstorm Wind, Marshall
- When
- July 1, 11:50 PM CST
- Where
- Marshall County
- Coordinates
- 42.200, -92.800
Thunderstorm Wind, Polk
- When
- July 1, 11:55 PM CST
- Where
- Polk County
- Coordinates
- 41.700, -93.700
What these are
- 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
- Tornadoes and Hail in South Dakota, July 1, 1973
- Tornadoes in North Dakota, July 1, 1973
- Tornadoes and Hail in Nebraska, July 1, 1973
- Tornado in Illinois, July 1, 1973
- Tornado and Damaging Winds in Minnesota, July 1, 1973
- Damaging Winds in Kentucky, July 1, 1973
- Hail in Alabama, July 1, 1973
- Damaging Wind in Mississippi, July 1, 1973
- Damaging Wind in Tennessee, July 1, 1973
More
Every storm in Iowa in 1973Every state in 1973This day in weather historyThe tornado archive for Iowa, 1973
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: 10013366, 10013367, 10013368, 10013369, 10013657, 10013658, 10013659, 10013660, 10013661, 10013019, 10013020, 10013662, 10013021, 10013022, 10013023, 10013024, 10013025, 10013026, 10013027, 10013028.