Thunderstorm Wind, Black Hawk
- When
- April 8, 1:00 PM CST
- Where
- Black Hawk County
- Coordinates
- 42.470, -92.270
Tornado and Hail in Iowa, April 8, 1991
10 thunderstorm wind, 3 hail, 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
- 1
- Property damage
- $250
- Crop damage
- None recorded
- Events
- 14
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, 3 hail, 1 tornado. Local standard time, as filed.
Thunderstorm Wind, Buchanan
- When
- April 8, 1:13 PM CST
- Where
- Buchanan County
- Coordinates
- 42.630, -92.050
Thunderstorm Wind, Winneshiek
- When
- April 8, 1:15 PM CST
- Where
- Winneshiek County
- Coordinates
- 43.300, -91.800
Thunderstorm Wind, Buchanan
- When
- April 8, 1:15 PM CST
- Where
- Buchanan County
- Measured
- 70 kt (81 mph)
- Coordinates
- 42.450, -91.970
Thunderstorm Wind, Clayton
- When
- April 8, 2:05 PM CST
- Where
- Clayton County
- Coordinates
- 42.800, -91.530
Thunderstorm Wind, Clayton
- When
- April 8, 2:15 PM CST
- Where
- Clayton County
- Coordinates
- 42.930, -91.380
Thunderstorm Wind, Jones
- When
- April 8, 2:15 PM CST
- Where
- Jones County
- Injuries
- 1 direct, 0 indirect
- Coordinates
- 42.270, -91.200
Thunderstorm Wind, Delaware
- When
- April 8, 2:16 PM CST
- Where
- Delaware County
- Coordinates
- 42.350, -91.250
Tornado, Delaware
- When
- April 8, 2:30 PM CST
- Where
- Delaware County
- Rating
- F0
- Path length
- 0.5 mi
- Path width
- 17 yd
- Property damage
- $250
- Coordinates
- 42.570, -91.180
Hail, Dubuque
- When
- April 8, 2:44 PM CST
- Where
- Dubuque County
- Measured
- 0.75 in hail
- Coordinates
- 42.400, -90.720
Thunderstorm Wind, Delaware
- When
- April 8, 2:52 PM CST
- Where
- Delaware County
- Coordinates
- 42.600, -91.350
Hail, Polk
- When
- April 8, 5:05 PM CST
- Where
- Polk County
- Measured
- 1 in hail
- Coordinates
- 41.600, -93.720
Hail, Polk
- When
- April 8, 5:18 PM CST
- Where
- Polk County
- Measured
- 0.9 in hail
- Coordinates
- 41.730, -93.620
Thunderstorm Wind, Washington
- When
- April 8, 9:42 PM CST
- Where
- Washington County
- Measured
- 52 kt (60 mph)
- Coordinates
- 41.180, -91.820
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.
- 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
- Tornado in Minnesota, April 8, 1991
- Tornado and Hail in Wisconsin, April 8, 1991
- Hail in Missouri, April 8, 1991
- Hail and Damaging Winds in Alabama, April 8, 1991
- Hail and Damaging Wind in North Carolina, April 8, 1991
- Hail and Damaging Winds in South Carolina, April 8, 1991
- Hail in Nebraska, April 8, 1991
- Damaging Winds in Mississippi, April 8, 1991
- Hail in Florida, April 8, 1991
- Tornado in Texas, April 8, 1991
- Damaging Wind in Pennsylvania, April 8, 1991
- Damaging Wind in Georgia, April 8, 1991
More
Every storm in Iowa in 1991Every state in 1991This day in weather historyThe tornado archive for Iowa, 1991Warnings in Iowa, April 1991
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: 10028553, 10028554, 10028555, 10028556, 10028557, 10028558, 10028559, 10028560, 10028561, 10028562, 10028563, 10028564, 10028565, 10028566.