Clusters of thunderstorms developed along a cold front as it moved east across the Mississippi Valley. As the atmosphere became very unstable due to daytime heating and hot south winds, the clusters evolved into a well-organized mesoscale convective system during the afternoon. Numerous reports of damaging winds accompanied storms within the complex as it moved southeast.

Thunderstorm Wind in POPE, ILLINOIS
From 15-JUN-10 15:22:00 to 15-JUN-10 15:22:00 (CST-6)
Location: GOLCONDA
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A five-foot diameter tree was blown over. Other large tree limbs were blown down, some on power lines.

Thunderstorm Wind in PERRY, ILLINOIS
From 15-JUN-10 14:00:00 to 15-JUN-10 14:00:00 (CST-6)
Location: PINCKNEYVILLE
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs were down on a house. Winds were estimated near 60 mph at Highway 13 and 154 on the west side of town.

Hail in SALINE, ILLINOIS
From 15-JUN-10 14:45:00 to 15-JUN-10 14:45:00 (CST-6)
Location: HARRISBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JOHNSON, ILLINOIS
From 15-JUN-10 14:53:00 to 15-JUN-10 14:53:00 (CST-6)
Location: GANNTOWN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Nickel-size hail was reported at mile marker 23 on Interstate 24 in the extreme southeast part of the county.

Funnel Cloud in JOHNSON, ILLINOIS
From 15-JUN-10 14:08:00 to 15-JUN-10 14:09:00 (CST-6)
Location: WEST VIENNA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A photograph of an apparent funnel cloud was taken near West Vienna.

Hail in JOHNSON, ILLINOIS
From 15-JUN-10 14:10:00 to 15-JUN-10 14:10:00 (CST-6)
Location: WEST VIENNA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JEFFERSON, ILLINOIS
From 15-JUN-10 14:30:00 to 15-JUN-10 14:30:00 (CST-6)
Location: MT VERNON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WAYNE, ILLINOIS
From 15-JUN-10 15:03:00 to 15-JUN-10 15:03:00 (CST-6)
Location: GEFF
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A garage was flattened. Tree limbs and power lines were down in the area.

Thunderstorm Wind in EDWARDS, ILLINOIS
From 15-JUN-10 15:25:00 to 15-JUN-10 15:35:00 (CST-6)
Location: ALBION
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and utility lines were down around the county.

Thunderstorm Wind in JEFFERSON, ILLINOIS
From 15-JUN-10 14:15:00 to 15-JUN-10 14:30:00 (CST-6)
Location: WOODLAWN
Magnitude: 56.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

In Mount Vernon, numerous tree limbs and wires were blown down, along with one power pole. Streets were blocked by downed limbs and wires. Some businesses received minor damage, such as ripped awnings and fallen gutters. An antenna with its 30-foot tower was brought down at a city residence. A fence was blown over. Elsewhere in the county, a couple of trees were blown down in Woodlawn and Nason.

Thunderstorm Wind in JOHNSON, ILLINOIS
From 15-JUN-10 14:00:00 to 15-JUN-10 14:10:00 (CST-6)
Location: CYPRESS
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were blown down near Route 37.

Thunderstorm Wind in WABASH, ILLINOIS
From 15-JUN-10 15:50:00 to 15-JUN-10 15:50:00 (CST-6)
Location: MT CARMEL
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a wind gust to 60 mph on the west side of town. A power line was down across a street. Tree limbs were blown down across the city, and some of them landed on power lines. Some of the limbs were three to four inches in diameter. Power was out for 12 to 24 hours in some cases. A tree limb fell on a gas line, causing a leak.

Thunderstorm Wind in MASSAC, ILLINOIS
From 15-JUN-10 16:00:00 to 15-JUN-10 16:00:00 (CST-6)
Location: MIDWAY
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An old wood barn was blown down on Highway 145 a few miles north of the U.S. Highway 45 intersection.

Thunderstorm Wind in MASSAC, ILLINOIS
From 15-JUN-10 15:30:00 to 15-JUN-10 15:36:00 (CST-6)
Location: METROPOLIS
Magnitude: 65.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Trained Spotter

In Metropolis, large tree limbs were blown down. A metal carport was blown over. A trained spotter measured a wind gust to 60 mph on the Interstate 24 bridge over the Ohio River. The most concentrated area of damage appeared to be on the north side of Metropolis, where numerous large limbs were down, some whole trees were uprooted, and sections of a large fence were blown down. On Interstate 24 at the Metropolis exit, a tractor-trailer rig hauling half of a mobile office was blown off the road. The half of the mobile office was destroyed.

Thunderstorm Wind in WHITE, ILLINOIS
From 15-JUN-10 15:23:00 to 15-JUN-10 15:26:00 (CST-6)
Location: CARMI
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

In Carmi, three power poles and a light pole were blown down. A few trees and numerous large tree limbs were blown down. There were numerous power outages. South of Epworth, a couple of trees were down.

Thunderstorm Wind in SALINE, ILLINOIS
From 15-JUN-10 14:45:00 to 15-JUN-10 14:45:00 (CST-6)
Location: GALATIA
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down.

Thunderstorm Wind in PERRY, ILLINOIS
From 15-JUN-10 14:30:00 to 15-JUN-10 14:30:00 (CST-6)
Location: HOLDEN
Magnitude: 57.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A wind gust to 66 mph was measured on U.S. Highway 51 north of DuQuoin. At Sunfield, numerous trees and power lines were blown down near City Lake. A few trees and power lines were blown down on the north side of DuQuoin. There were 1,800 families without power in Perry County at the peak of the power outages.