A line of severe thunderstorms moved across northern Illinois during the evening of August 2nd.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 02-AUG-11 20:48:00 to 02-AUG-11 20:48:00 (CST-6)
Location: ELMHURST
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 65 mph and blew down trees on portions of York Street and Prospect Avenue.

Thunderstorm Wind in COOK, ILLINOIS
From 02-AUG-11 20:54:00 to 02-AUG-11 20:54:00 (CST-6)
Location: CHICAGO RIDGE
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in COOK, ILLINOIS
From 02-AUG-11 21:02:00 to 02-AUG-11 21:02:00 (CST-6)
Location: HOMETOWN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 70 mph.

Hail in KANKAKEE, ILLINOIS
From 02-AUG-11 22:36:00 to 02-AUG-11 22:37:00 (CST-6)
Location: BOURBONNAIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 02-AUG-11 22:34:00 to 02-AUG-11 22:36:00 (CST-6)
Location: BOURBONNAIS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Airplane Pilot

Two separate reports estimated winds between 60 and 65 mph.

Lightning in WILL, ILLINOIS
From 02-AUG-11 22:43:00 to 02-AUG-11 22:43:00 (CST-6)
Location: NEW LENOX HOWELL ARP
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike destroyed the roof and chimney of a two story home on the 22500 block of Home Court.

Thunderstorm Wind in DE KALB, ILLINOIS
From 02-AUG-11 19:44:00 to 02-AUG-11 19:44:00 (CST-6)
Location: FAIRDALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down as well as power lines around Fairdale.

Thunderstorm Wind in DE KALB, ILLINOIS
From 02-AUG-11 20:00:00 to 02-AUG-11 20:00:00 (CST-6)
Location: DE KALB
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 60 mph, and caused a small tree to snap in half.

Thunderstorm Wind in DE KALB, ILLINOIS
From 02-AUG-11 20:05:00 to 02-AUG-11 20:05:00 (CST-6)
Location: CORTLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 60 mph near Somonauk Road and Interstate 88.

Thunderstorm Wind in COOK, ILLINOIS
From 02-AUG-11 20:17:00 to 02-AUG-11 20:17:00 (CST-6)
Location: STREAMWOOD
Magnitude: 60.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Severe winds damaged the roof of a plumbing company causing a gas leak and scattering roofing material and bricks around the area.

Thunderstorm Wind in COOK, ILLINOIS
From 02-AUG-11 20:18:00 to 02-AUG-11 20:18:00 (CST-6)
Location: INVERNESS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 65 mph.

Thunderstorm Wind in KANE, ILLINOIS
From 02-AUG-11 20:22:00 to 02-AUG-11 20:22:00 (CST-6)
Location: BATAVIA
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in KANE, ILLINOIS
From 02-AUG-11 20:34:00 to 02-AUG-11 20:34:00 (CST-6)
Location: SUGAR GROVE
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in DU PAGE, ILLINOIS
From 02-AUG-11 20:38:00 to 02-AUG-11 20:38:00 (CST-6)
Location: WHEATON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 60 mph.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 02-AUG-11 16:59:00 to 02-AUG-11 16:59:00 (CST-6)
Location: RICHMOND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down.

Thunderstorm Wind in LAKE, ILLINOIS
From 02-AUG-11 17:26:00 to 02-AUG-11 17:26:00 (CST-6)
Location: WINTHROP HARBOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous branches were blown down and were blocking a roadway.

Thunderstorm Wind in LAKE, ILLINOIS
From 02-AUG-11 17:26:00 to 02-AUG-11 17:26:00 (CST-6)
Location: ZION
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees, branches, and power lines were blown down blocking a roadway.

Lightning in DU PAGE, ILLINOIS
From 02-AUG-11 21:10:00 to 02-AUG-11 21:10:00 (CST-6)
Location: FOUR LAKES
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a house on Augustana Drive causing a fire in the attic and roof.  The house was left unihabitable until repairs could be made.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 02-AUG-11 21:01:00 to 02-AUG-11 21:02:00 (CST-6)
Location: COAL CITY
Magnitude: 56.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Mesonet

Winds measured to 64 mph caused a tree to fall onto a house, and another to fall onto the roadway, blocking portions of Kankakee Street.  A transformer was also blown down.  A large tree limb fell on Division Street and just missed hitting a vehicle.

Thunderstorm Wind in COOK, ILLINOIS
From 02-AUG-11 20:50:00 to 02-AUG-11 20:50:00 (CST-6)
Location: NORTH RIVERSIDE
Magnitude: 56.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds measured to 65 mph caused a 6-inch diameter tree limb to fall on a car.

Thunderstorm Wind in WILL, ILLINOIS
From 02-AUG-11 22:10:00 to 02-AUG-11 22:10:00 (CST-6)
Location: BRAIDWOOD
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees and tree limbs were blown down, including some that fell onto vehicles.  Power lines were also blown down along Division Street and Main Street.

Thunderstorm Wind in COOK, ILLINOIS
From 02-AUG-11 20:18:00 to 02-AUG-11 20:18:00 (CST-6)
Location: SCHAUMBURG
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GRUNDY, ILLINOIS
From 02-AUG-11 21:25:00 to 02-AUG-11 21:25:00 (CST-6)
Location: MINOOKA
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in DE KALB, ILLINOIS
From 02-AUG-11 20:05:00 to 02-AUG-11 20:05:00 (CST-6)
Location: CORTLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds were estimated to 60 mph near Somonauk Road and Interstate 88.