Thunderstorm Wind, Keokuk
- When
- June 10, 12:10 PM CST
- Where
- Keokuk County, Delta
- Measured
- 53 kt (61 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.330, -92.330
Several tree limbs downed.
Tornadoes and Flood in Iowa, June 10, 1999
10 thunderstorm wind, 3 tornado, 2 hail, 1 flood, as filed by the National Weather Service.
Where it happened
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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
- 16
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.
The radar
The national radar mosaic for the moment the first event began.
Event by event
10 thunderstorm wind, 3 tornado, 2 hail, 1 flood. Local standard time, as filed.
Hail, Keokuk
- When
- June 10, 12:10 PM CST
- Where
- Keokuk County, 3 mi S of Delta
- Measured
- 1.25 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.280, -92.330
Thunderstorm Wind, Benton
- When
- June 10, 12:40 PM CST
- Where
- Benton County, 4 mi S of Van Horne
- Measured
- 53 kt (61 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.970, -92.080
Several tree limbs downed.
Thunderstorm Wind, Benton
- When
- June 10, 12:40 PM CST
- Where
- Benton County, 2 mi SE of Garrison
- Measured
- 53 kt (61 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 42.130, -92.120
Large trees downed.
Tornado, Linn
- When
- June 10, 1:00 PM CST
- Where
- Linn County, 3 mi E of Cedar Rapids
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 10 yd
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 42.000, -91.580
A brief tornado touchdown produced no reports of injuries or damage.
Thunderstorm Wind, Linn
- When
- June 10, 1:10 PM CST
- Where
- Linn County, 5 mi N of Cedar Rapids
- Measured
- 61 kt (70 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.070, -91.650
Tornado, Jones
- When
- June 10, 1:16 PM CST
- Where
- Jones County, Martelle
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 10 yd
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.020, -91.370
A tornado touched down briefly causing no damage or injuries.
Tornado, Linn
- When
- June 10, 1:17 PM CST
- Where
- Linn County, Coggon
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 10 yd
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 42.280, -91.530
A tornado touched down briefly causing no injuries or damage.
Thunderstorm Wind, Jones
- When
- June 10, 1:23 PM CST
- Where
- Jones County, 1 mi N of Onslow
- Measured
- 55 kt (63 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.130, -91.020
Several power poles blown over.
Thunderstorm Wind, Jones
- When
- June 10, 1:23 PM CST
- Where
- Jones County, Monticello
- Measured
- 53 kt (61 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 42.230, -91.200
Several trees downed.
Flood, Johnson
- When
- June 10, 1:30 PM CST
- Where
- Johnson County, Iowa City
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.672, -91.588 (the zone’s center; the record gives no point)
Heavy rains flooded Route 218.
Thunderstorm Wind, Muscatine
- When
- June 10, 1:49 PM CST
- Where
- Muscatine County, Pleasant Prairie
- Measured
- 55 kt (63 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.520, -90.880
Power poles downed.
Thunderstorm Wind, Scott
- When
- June 10, 1:56 PM CST
- Where
- Scott County, Blue Grass to 3 mi E of Blue Grass
- Measured
- 55 kt (63 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.470, -90.770
Several tree limbs and power poles downed.
Hail, Muscatine
- When
- June 10, 1:56 PM CST
- Where
- Muscatine County, 1 mi E of Montpelier
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.470, -90.800
Thunderstorm Wind, Scott
- When
- June 10, 2:42 PM CST
- Where
- Scott County, 2 mi W of Blue Grass
- Measured
- 55 kt (63 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.520, -90.800
Power lines downed.
Thunderstorm Wind, Scott
- When
- June 10, 2:46 PM CST
- Where
- Scott County, 2 mi S of Mc Causland
- Measured
- 53 kt (61 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.730, -90.400
Power lines downed.
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.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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.
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Lightning Strike in Illinois, June 10, 1999
- Flash Flood and Flood in Ohio, June 10 to 12, 1999
- Flood and Hail in Pennsylvania, June 10, 1999
- Hail in Texas, June 10, 1999
- Flash Flooding and Flooding in Wisconsin, June 10, 1999
- Hail and Damaging Winds in Texas, June 10, 1999
- Damaging Winds and Lightning Strike in Ohio, June 10, 1999
- Lightning Strike in Tennessee, June 10, 1999
- Flash Flood and Hail in Kansas, June 10, 1999
- Hail and Damaging Winds in Illinois, June 10, 1999
- Damaging Winds and Lightning Strikes in Iowa, June 10, 1999
- Damaging Winds in Michigan, June 10, 1999
More
Every storm in Iowa in 1999Every state in 1999This day in weather historyThe tornado archive for Iowa, 1999Warnings in Iowa, June 1999
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: 5716270, 5716271, 5716272, 5716273, 5716283, 5716274, 5716284, 5716359, 5716275, 5716276, 5716277, 5716278, 5716279, 5716280, 5716281, 5716282.