Powerful severe thunderstorms moved southeast across far northeast Illinois during the late evening hours of June 30th.  Thousands of trees were blown down in eastern Lake County Illinois.  Hail as large as baseballs fell across many areas of the city of Chicago.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:23:00 to 30-JUN-11 20:24:00 (CST-6)
Location: AVONDALE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail was reported near Irving Park Road and Lake Shore Drive.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:25:00 to 30-JUN-11 20:27:00 (CST-6)
Location: CLYBOURN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail 1.5 inches in diameter was reported near Erie Street and Racine Avenue.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:26:00 to 30-JUN-11 20:28:00 (CST-6)
Location: DEERING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Half dollar size hail was reported in the Lakeview neighborhood.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:30:00 to 30-JUN-11 20:33:00 (CST-6)
Location: CRAGIN
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail 2.0 inches in diameter was reported in Logan Square.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:29:00 to 30-JUN-11 20:31:00 (CST-6)
Location: AVONDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Quarter size hail was reported in Ravenswood.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:33:00 to 30-JUN-11 20:36:00 (CST-6)
Location: AUSTIN
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail 2.0 inches in diameter was reported near 5th Avenue and Pulaski Road.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:45:00 to 30-JUN-11 20:48:00 (CST-6)
Location: EVERGREEN PARK
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in COOK, ILLINOIS
From 30-JUN-11 21:00:00 to 30-JUN-11 21:03:00 (CST-6)
Location: HARVEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COOK, ILLINOIS
From 30-JUN-11 20:32:00 to 30-JUN-11 20:34:00 (CST-6)
Location: AUSTIN
Magnitude: 2.00 
Property damage: 17.00M
Crop damage: 0.00K
Reported by: Newspaper

Hail 2.0 inches in diameter shattered thousands of glass panes at the Garfield Park Conservatory.  Clean up costs were estimated at $2 million while repair and replacement costs were estimated at $15 million.

Thunderstorm Wind in LAKE, ILLINOIS
From 30-JUN-11 19:25:00 to 30-JUN-11 19:25:00 (CST-6)
Location: WINTHROP HARBOR
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees greater than 12 inches in diameter and light poles were blown down at North Point Marina.

Thunderstorm Wind in LAKE, ILLINOIS
From 30-JUN-11 19:19:00 to 30-JUN-11 19:24:00 (CST-6)
Location: ZION
Magnitude: 70.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous large trees were uprooted or blown down in Zion along with tree limbs and power lines.

Thunderstorm Wind in LAKE, ILLINOIS
From 30-JUN-11 19:26:00 to 30-JUN-11 19:26:00 (CST-6)
Location: BONNIE BROOKS
Magnitude: 65.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

In Beach Park, a tree fell onto a car and structural damage was reported to a house after a tree fell on it.

Thunderstorm Wind in LAKE, ILLINOIS
From 30-JUN-11 19:23:00 to 30-JUN-11 19:27:00 (CST-6)
Location: ZION
Magnitude: 78.00 EG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Over 1,000 trees were either uprooted or split in half at the Illinois Beach State Park.  Various structures as well as mobile campers sustained damage from the falling trees.

Thunderstorm Wind in COOK, ILLINOIS
From 30-JUN-11 19:50:00 to 30-JUN-11 19:50:00 (CST-6)
Location: HOMETOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 60 mph.

Hail in WILL, ILLINOIS
From 30-JUN-11 20:18:00 to 30-JUN-11 20:20:00 (CST-6)
Location: PARK FOREST SOUTH
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail 1.5 inches in diameter was reported in University Park.

Thunderstorm Wind in WILL, ILLINOIS
From 30-JUN-11 20:18:00 to 30-JUN-11 20:18:00 (CST-6)
Location: PARK FOREST SOUTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Wind gusts were estimated to 60 mph in University Park.

Hail in WILL, ILLINOIS
From 30-JUN-11 20:20:00 to 30-JUN-11 20:21:00 (CST-6)
Location: FAITHORN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported near Route 1 and Crete-Monee Road.

Thunderstorm Wind in COOK, ILLINOIS
From 30-JUN-11 20:46:00 to 30-JUN-11 20:46:00 (CST-6)
Location: EVERGREEN PARK
Magnitude: 55.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Newspaper

A large tree was blown down on to power lines near 102nd and Wood Streets.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:35:00 to 30-JUN-11 20:38:00 (CST-6)
Location: BRIGHTON PARK
Magnitude: 2.75 
Property damage: 750.00K
Crop damage: 0.00K
Reported by: Public

Hail as large as baseballs was reported near 26th Street and Kedzie Avenue.  Hundreds of vehicles were damaged including at least 130 police cars that suffered broken windshields and smashed rooftop lights.

Hail in COOK, ILLINOIS
From 30-JUN-11 20:33:00 to 30-JUN-11 20:36:00 (CST-6)
Location: CORWITH
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail 2.0 inches in diameter was reported near 26th Street and Pulaski Road.