A strong cold front moved southward through the region triggering showers and thunderstorms.  Some of the storms produced severe weather and flash flooding.

Thunderstorm Wind in MADISON, ILLINOIS
From 05-AUG-08 17:20:00 to 05-AUG-08 17:20:00 (CST-6)
Location: GODFREY
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in RANDOLPH, ILLINOIS
From 05-AUG-08 18:00:00 to 05-AUG-08 18:00:00 (CST-6)
Location: RUMA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The roof was blown off of a house under construction.

Thunderstorm Wind in MADISON, ILLINOIS
From 05-AUG-08 18:13:00 to 05-AUG-08 18:13:00 (CST-6)
Location: HIGHLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous large tree limbs were blown down around town.

Thunderstorm Wind in MONROE, ILLINOIS
From 05-AUG-08 18:15:00 to 05-AUG-08 18:15:00 (CST-6)
Location: WATERLOO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several power lines and tree limbs.  Also, a large tree was blown down onto the roof of a nearby house.

Thunderstorm Wind in BOND, ILLINOIS
From 05-AUG-08 18:20:00 to 05-AUG-08 18:20:00 (CST-6)
Location: WOBURN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down numerous tree limbs from Woburn to just south of Van Burensburg in extreme northeastern Bond county.

Thunderstorm Wind in BOND, ILLINOIS
From 05-AUG-08 18:25:00 to 05-AUG-08 18:25:00 (CST-6)
Location: MULBERRY GROVE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several power lines were blown down north of Mulberry Grove.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 05-AUG-08 18:25:00 to 05-AUG-08 18:25:00 (CST-6)
Location: LEBANON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down numerous tree limbs in town.

Hail in CLINTON, ILLINOIS
From 05-AUG-08 18:30:00 to 05-AUG-08 18:30:00 (CST-6)
Location: AVISTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MADISON, ILLINOIS
From 05-AUG-08 17:30:00 to 05-AUG-08 17:30:00 (CST-6)
Location: BETHALTO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JERSEY, ILLINOIS
From 05-AUG-08 17:10:00 to 05-AUG-08 17:30:00 (CST-6)
Location: JERSEYVILLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A line of severe storms moved across Jersey county blowing down numerous trees, tree limbs and power lines.  In Jerseyville, a microburst caused extensive damage to two businesses.  One business sustained roof and window damage and the other just had its windows blown out.  Several of the large trees that fell, fell onto unoccupied vehicles causing severe damage.  One tree fell onto a patio roof collapsing it.  Several witnesses from Jerseyville indicated that winds of 60 mph and greater occurred for approximately 3 to 5 minutes with the strongest gusts occurring near the early stages of heavy rainfall.

Thunderstorm Wind in MONTGOMERY, ILLINOIS
From 05-AUG-08 17:55:00 to 05-AUG-08 18:00:00 (CST-6)
Location: WALSHVILLE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The line of severe storms moved across Montgomery county.  A microburst occurred in the vicinity of Walshville and Panama.  Numerous trees, tree limbs and power lines were blown down in the area.  A very large tree fell on top of a two story home east of Walshville causing extensive damage.  Also, several power poles were snapped and corn flattened just northeast of Panama.

Flash Flood in MACOUPIN, ILLINOIS
From 05-AUG-08 20:30:00 to 06-AUG-08 00:30:00 (CST-6)
Location: BRIGHTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Very heavy rain fell in a short amount of time on already saturated soils causing flash flooding.  Illinois Route 111 was closed about 4 miles south of Piasa due to flooding.

Flash Flood in JERSEY, ILLINOIS
From 05-AUG-08 20:30:00 to 06-AUG-08 00:30:00 (CST-6)
Location: DELHI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Very heavy rain fell in a short amount of time on already saturated soils causing flash flooding.  Illinois Route 111 was closed about 4 miles south of Piasa due to flooding.

Thunderstorm Wind in CLINTON, ILLINOIS
From 05-AUG-08 18:35:00 to 05-AUG-08 18:40:00 (CST-6)
Location: GERMANTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down numerous tree limbs from Germantown to Bartelso.  A few of the tree limbs fell onto cars causing minor damage.

Thunderstorm Wind in MONROE, ILLINOIS
From 05-AUG-08 18:50:00 to 05-AUG-08 18:50:00 (CST-6)
Location: COLUMBIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down numerous large tree limbs across town.  A few of the limbs fell onto Illinois Route 3.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 05-AUG-08 17:35:00 to 05-AUG-08 17:40:00 (CST-6)
Location: PIASA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The line of severe storms moved across southern portions of Macoupin county.  A microburst occurred just south of Shipman.  Numerous trees, tree limbs and power lines were blown down.  Also, a barn door was blown off two miles south of Shipman.

Thunderstorm Wind in BOND, ILLINOIS
From 05-AUG-08 18:20:00 to 05-AUG-08 18:20:00 (CST-6)
Location: DURLEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees and tree limbs were blown down in Pocahontas and Greenville.  Also, the winds caused a semi to jackknife on Interstate 70 between Pocahontas and Highland.

Hail in CALHOUN, ILLINOIS
From 05-AUG-08 16:55:00 to 05-AUG-08 16:55:00 (CST-6)
Location: BATCHTOWN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MONTGOMERY, ILLINOIS
From 05-AUG-08 17:45:00 to 05-AUG-08 17:55:00 (CST-6)
Location: LITCHFIELD MUNI ARPT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A line of severe storms moved through Montgomery county.  Numerous large trees, tree limbs and power lines were blown down in the Litchfield and Hillsboro areas.  One large tree landed on an unoccupied pickup truck causing extensive damage in Litchfield.  A ham radio tower was blown down in Hillsboro.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 05-AUG-08 17:45:00 to 05-AUG-08 17:50:00 (CST-6)
Location: GILLESPIE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

In Gillespie, a large tree fell onto a house causing moderate damage.  Also, numerous trees, tree limbs and power lines were blown down between Gillespie and Mount Olive.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 05-AUG-08 17:40:00 to 05-AUG-08 17:45:00 (CST-6)
Location: WOODBURN
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The line of severe storms moved across southern portions of Macoupin county.  A microburst occurred just south of Bunker Hill.  Numerous trees, tree limbs and power lines were blown down.  Also, a mobile home 4 miles east of Brighton was damaged by two fallen trees and another home one and a half miles south of Bunker Hill was damaged by a fallen tree.  Three of four roofs were torn off of the relatively new dugouts at the Bunker Hill High School baseball fields.  Small outbuildings and barns sustained minor damage in the area due to the microburst winds.