Thunderstorm Wind, Mercer
- When
- June 4, 1:40 PM CST
- Where
- Mercer County, Joy
- Measured
- 52 kt (60 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.200, -90.880
Power poles and numerous tree limbs were downed.
Tornado and Damaging Winds in Illinois, June 4, 1999
8 thunderstorm wind, 2 funnel cloud, 1 lightning, 1 tornado, as filed by the National Weather Service.
Where it happened
Every event with a place to put it; 3 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
- 1
- Property damage
- $6,000
- Crop damage
- None recorded
- Events
- 12
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
8 thunderstorm wind, 2 funnel cloud, 1 lightning, 1 tornado. Local standard time, as filed.
Lightning, Rock Island
- When
- June 4, 2:00 PM CST
- Where
- Rock Island County, Moline
- Property damage
- $1,000
- Reported by
- NEWSPAPER
- Coordinates
- 41.467, -90.567 (the zone’s center; the record gives no point)
A lightning strike damaged the attic area of a residence.
Thunderstorm Wind, Henry
- When
- June 4, 2:10 PM CST
- Where
- Henry County, Osco
- Measured
- 65 kt (75 mph)
- Property damage
- $3,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.350, -90.280
Several pieces of equipment were blown over or damaged at J&L Feed Service.
Thunderstorm Wind, Rock Island
- When
- June 4, 2:15 PM CST
- Where
- Rock Island County, Countywide
- Measured
- 56 kt (64 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.550, -90.650
Power poles and numerous tree limbs downed throughout the county.
Funnel Cloud, Henry
- When
- June 4, 2:20 PM CST
- Where
- Henry County, 3 mi E of Geneseo
- Reported by
- NEWSPAPER
- Coordinates
- 41.353, -90.131 (the zone’s center; the record gives no point)
Thunderstorm Wind, Henry
- When
- June 4, 2:20 PM CST
- Where
- Henry County, Geneseo
- Measured
- 65 kt (75 mph)
- Property damage
- $3,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.450, -90.150
A roof was partially blown off a house.
Thunderstorm Wind, Henry
- When
- June 4, 2:30 PM CST
- Where
- Henry County, Kewanee
- Measured
- 65 kt (75 mph)
- Injuries
- 1 direct, 0 indirect
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.230, -89.930
Straight line winds blew a truck over in Kewanee. The driver escaped with only minor injuries. The sheriff's department received many calls regarding power lines being downed. Winds also ripped the top off a grain elevator and blew part of a roof off a building. A tree was also blown over onto a car at Lexington and Fourth street.
Thunderstorm Wind, Hancock
- When
- June 4, 2:35 PM CST
- Where
- Hancock County, Ferris
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.470, -91.170
Thunderstorm Wind, McDonough
- When
- June 4, 3:00 PM CST
- Where
- McDonough County, Macomb
- Measured
- 56 kt (64 mph)
- Reported by
- GENERAL PUBLIC
- Coordinates
- 40.470, -90.670
Funnel Cloud, McDonough
- When
- June 4, 3:00 PM CST
- Where
- McDonough County, 1 mi S of Bushnell
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.456, -90.678 (the zone’s center; the record gives no point)
Thunderstorm Wind, Bureau
- When
- June 4, 3:14 PM CST
- Where
- Bureau County, Wyanet
- Measured
- 56 kt (64 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.370, -89.580
Several trees downed in town.
Tornado, Putnam
- When
- June 4, 3:30 PM CST
- Where
- Putnam County, 1 mi N of Mc Nabb
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 10 yd
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.200, -89.220
Brief tornado touchdown with no reported damage.
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.
- Lightning
- A lightning strike that killed, injured or caused damage.
- Funnel Cloud
- A rotating column of cloud extending from a thunderstorm that did not reach the ground.
- 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
- Tornado and Hail in Kansas, June 4 to 5, 1999
- Tornado in Nebraska, June 4, 1999
- Tornado in Nebraska, June 4, 1999
- Hail and Damaging Winds in Georgia, June 4, 1999
- Hail and Damaging Winds in Iowa, June 4, 1999
- Tornadoes and Hail in Illinois, June 4, 1999
- Damaging Winds in Kansas, June 4, 1999
- Tornado in South Dakota, June 4, 1999
- Tornado and Damaging Winds in Oklahoma, June 4, 1999
- Tornado and Hail in Nebraska, June 4, 1999
- Flash Flood and Hail in Minnesota, June 4, 1999
- Flash Flood in Nebraska, June 4, 1999
More
Every storm in Illinois in 1999Every state in 1999This day in weather historyThe tornado archive for Illinois, 1999Warnings in Illinois, 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: 5716067, 5716071, 5716173, 5716068, 5716171, 5716174, 5716170, 5716065, 5716066, 5716069, 5716070, 5716172.