Severe thunderstorms rapidly developed across parts of northeast Illinois during the afternoon hours of June 4th.  The thunderstorms quickly began producing large hail and then began producing destructive winds with gusts estimated as high as 80 mph.

Hail in WILL, ILLINOIS
From 04-JUN-11 14:52:00 to 04-JUN-11 14:54:00 (CST-6)
Location: LOCKPORT LEWIS ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Quarter size hail was observed at the National Weather Service office in Romeoville, IL.

Hail in COOK, ILLINOIS
From 04-JUN-11 15:21:00 to 04-JUN-11 15:23:00 (CST-6)
Location: RICHTON PARK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail was reported near Route 30 and Harlem Avenue.

Hail in WILL, ILLINOIS
From 04-JUN-11 15:31:00 to 04-JUN-11 15:32:00 (CST-6)
Location: MONEE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel size hail was reported near Bruns and Ridgeland Roads.

Hail in WILL, ILLINOIS
From 04-JUN-11 15:38:00 to 04-JUN-11 15:40:00 (CST-6)
Location: EAGLE LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail was reported near Kentucky and Stateline Roads.

Hail in WILL, ILLINOIS
From 04-JUN-11 15:16:00 to 04-JUN-11 15:19:00 (CST-6)
Location: MANHATTAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in WILL, ILLINOIS
From 04-JUN-11 15:00:00 to 04-JUN-11 15:02:00 (CST-6)
Location: LOCKPORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WILL, ILLINOIS
From 04-JUN-11 15:12:00 to 04-JUN-11 15:14:00 (CST-6)
Location: MANHATTAN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar size hail was reported near Route 52 and White Feather Drive.

Hail in COOK, ILLINOIS
From 04-JUN-11 15:15:00 to 04-JUN-11 15:18:00 (CST-6)
Location: TINLEY PARK
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 04-JUN-11 15:40:00 to 04-JUN-11 15:40:00 (CST-6)
Location: MANTENO
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust to 62 mph was measured near Route 45 and County Road 9000.

Hail in KANKAKEE, ILLINOIS
From 04-JUN-11 15:56:00 to 04-JUN-11 15:58:00 (CST-6)
Location: SHERBURNVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail was reported near Route 17 and 14500 East.

Hail in KANKAKEE, ILLINOIS
From 04-JUN-11 15:40:00 to 04-JUN-11 15:42:00 (CST-6)
Location: MANTENO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter size hail was reported near Route 45 and County Road 9000.

Hail in KANE, ILLINOIS
From 04-JUN-11 14:26:00 to 04-JUN-11 14:28:00 (CST-6)
Location: SUGAR GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KENDALL, ILLINOIS
From 04-JUN-11 14:29:00 to 04-JUN-11 14:31:00 (CST-6)
Location: OSWEGO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter size hail was reported near Collins and Grove Roads.

Hail in COOK, ILLINOIS
From 04-JUN-11 14:47:00 to 04-JUN-11 14:48:00 (CST-6)
Location: LYONS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Penny size hail was reported near Interstate 55 and Harlem Avenue.

Hail in WILL, ILLINOIS
From 04-JUN-11 14:51:00 to 04-JUN-11 14:53:00 (CST-6)
Location: PLAINFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail was reported near Route 30 and Renwick Road.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 04-JUN-11 16:40:00 to 04-JUN-11 16:40:00 (CST-6)
Location: ONARGA
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in FORD, ILLINOIS
From 04-JUN-11 19:15:00 to 04-JUN-11 19:15:00 (CST-6)
Location: MELVIN
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Five utility poles were blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 04-JUN-11 14:55:00 to 04-JUN-11 14:58:00 (CST-6)
Location: OAK LAWN
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Approximately 50 trees were blown down or damaged in Oak Lawn.  Numerous tree limbs were also blown down.  Wind gusts were estimated between 70 and 80 mph.

Thunderstorm Wind in COOK, ILLINOIS
From 04-JUN-11 14:56:00 to 04-JUN-11 14:56:00 (CST-6)
Location: BURBANK
Magnitude: 70.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Significant tree damage was reported with two to three foot diameter trees uprooted and blown down.  Some of the trees fell onto houses.  Minor sign damage was reported to a business on 95th Street.

Hail in WILL, ILLINOIS
From 04-JUN-11 14:43:00 to 04-JUN-11 14:46:00 (CST-6)
Location: NORMANTOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golfball size hail was reported near Route 30 and 135th Street as well as one mile west of Plainfield.  Penny size hail was reported in numerous areas in and around Plainfield.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 04-JUN-11 16:08:00 to 04-JUN-11 16:11:00 (CST-6)
Location: WATSEKA
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees approximately two feet in diameter were blown down, some blocking streets.  Several utility poles were either blown down or snapped off at their base.  Numerous tree limbs and power lines were blown down.  The roof of a house on Fourth Street was damaged when a chimney was blown down and fell onto the roof.  The roof of another house on Fourth Street was damaged by a falling tree.  A large tree was blown down near South Fifth and Locust.

Hail in COOK, ILLINOIS
From 04-JUN-11 14:47:00 to 04-JUN-11 14:48:00 (CST-6)
Location: NORTH RIVERSIDE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 04-JUN-11 16:45:00 to 04-JUN-11 16:45:00 (CST-6)
Location: WATSEKA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Large trees were blown down near Kay Street and Route 24.

Hail in COOK, ILLINOIS
From 04-JUN-11 14:29:00 to 04-JUN-11 14:30:00 (CST-6)
Location: MELROSE PARK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager