Illinois, 1999

Tornadoes and Flood in Illinois, June 6, 1999

June 6, 1999 · NWS DVN · 15 events in 7 counties and zones

6 thunderstorm wind, 5 hail, 2 tornado, 1 flood, 1 lightning, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 2 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

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The toll

Deaths
0
Injuries
0
Property damage
$20,000
Crop damage
None recorded
Events
15

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.

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Event by event

6 thunderstorm wind, 5 hail, 2 tornado, 1 flood, 1 lightning. Local standard time, as filed.

Hail, Rock Island

When
June 6, 1:32 PM CST
Where
Rock Island County, 1 mi S of Milan
Measured
1 in hail
Reported by
LAW ENFORCEMENT
Coordinates
41.430, -90.570

Hail, Whiteside

When
June 6, 1:40 PM CST
Where
Whiteside County, Fulton
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.870, -90.170

Thunderstorm Wind, Carroll

When
June 6, 1:53 PM CST
Where
Carroll County, Savanna
Measured
72 kt (83 mph)
Reported by
LAW ENFORCEMENT
Coordinates
42.080, -90.150

Several 15 inch diameter trees uprooted.

Hail, Warren

When
June 6, 1:55 PM CST
Where
Warren County, Little York
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.020, -90.750

Thunderstorm Wind, Stephenson

When
June 6, 2:10 PM CST
Where
Stephenson County, Freeport
Measured
65 kt (75 mph)
Property damage
$5,000
Reported by
NEWSPAPER
Coordinates
42.280, -89.620

Roof partially torn off an apartment building.

Tornado, Stephenson

When
June 6, 2:14 PM CST
Where
Stephenson County, 1 mi N of Freeport
Rating
F0
Path length
0.1 mi
Path width
10 yd
Reported by
TRAINED SPOTTER
Coordinates
42.280, -89.620

Brief tornado touchdown produced no damage or injuries.

Thunderstorm Wind, Carroll

When
June 6, 2:15 PM CST
Where
Carroll County, Shannon
Measured
65 kt (75 mph)
Property damage
$5,000
Reported by
NEWSPAPER
Coordinates
42.150, -89.730

Straight line winds gusting over 70 mph damaged a tavern and tore part of a roof off a restaurant.

Thunderstorm Wind, Henderson

When
June 6, 2:30 PM CST
Where
Henderson County, Countywide
Measured
55 kt (63 mph)
Reported by
NEWSPAPER
Coordinates
40.870, -90.970

Numerous tree limbs downed throughout the county. Winds also caused scattered power outages across the county.

Flood, Stephenson

When
June 6, 2:30 PM CST
Where
Stephenson County, Freeport
Reported by
LAW ENFORCEMENT
Coordinates
42.352, -89.662 (the zone’s center; the record gives no point)

Heavy rain flooded several streets including Locust street and Chestnut street.

Lightning, Carroll

When
June 6, 2:30 PM CST
Where
Carroll County, Savanna
Property damage
$10,000
Reported by
NEWSPAPER
Coordinates
42.069, -89.934 (the zone’s center; the record gives no point)

Lightning struck a bell tower at St. Paul's Episcopal Church causing significant smoke and fire damage.

Tornado, Mercer

When
June 6, 3:00 PM CST
Where
Mercer County, Seaton
Rating
F0
Path length
0.1 mi
Path width
10 yd
Reported by
LAW ENFORCEMENT
Coordinates
41.100, -90.800

A tornado touched down briefly causing no injuries or damage.

Hail, Mercer

When
June 6, 3:04 PM CST
Where
Mercer County, Viola
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.200, -90.580

Hail, Stephenson

When
June 6, 3:10 PM CST
Where
Stephenson County, Freeport
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
42.280, -89.620

Thunderstorm Wind, Mercer

When
June 6, 3:15 PM CST
Where
Mercer County, Aledo
Measured
55 kt (63 mph)
Reported by
LAW ENFORCEMENT
Coordinates
41.200, -90.750

Several tree limbs downed. A large tree was blown down onto a baseball field.

Thunderstorm Wind, Stephenson

When
June 6, 3:22 PM CST
Where
Stephenson County, Freeport
Measured
55 kt (63 mph)
Reported by
LAW ENFORCEMENT
Coordinates
42.280, -89.620

Several trees downed.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Lightning
A lightning strike that killed, injured or caused damage.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

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: 5716452, 5716453, 5716457, 5716454, 5716463, 5716462, 5716465, 5716461, 5716464, 5716466, 5716460, 5716458, 5716455, 5716459, 5716456.