Scattered thunderstorms, including a few supercells, developed across northern Illinois producing large hail.

Hail in LA SALLE, ILLINOIS
From 13-JUL-15 16:40:00 to 13-JUL-15 16:40:00 (CST-6)
Location: OTTAWA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball size hail fell just north of Route 6.

Hail in LA SALLE, ILLINOIS
From 13-JUL-15 16:49:00 to 13-JUL-15 16:55:00 (CST-6)
Location: MARSEILLES
Magnitude: 3.75 
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Social Media

There were numerous reports of hail of up to 3.75 inches in diameter across portions of Marseilles.  A picture of the largest hail was received via social media.  A car dealership reported 40 damaged cars, 10 of which had shattered windshields.  A greenhouse was shattered.  The siding on numerous houses was damaged.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 13-JUL-15 17:20:00 to 13-JUL-15 17:20:00 (CST-6)
Location: ALTORF
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 16-inch diameter tree was uprooted.

Hail in KANKAKEE, ILLINOIS
From 13-JUL-15 18:20:00 to 13-JUL-15 18:20:00 (CST-6)
Location: HERSCHER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in COOK, ILLINOIS
From 13-JUL-15 18:20:00 to 13-JUL-15 18:22:00 (CST-6)
Location: FERNWAY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail was reported at 159th Street and 84th Avenue as well as 174th Street.

Hail in COOK, ILLINOIS
From 13-JUL-15 18:23:00 to 13-JUL-15 18:23:00 (CST-6)
Location: ORLAND PARK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in COOK, ILLINOIS
From 13-JUL-15 18:39:00 to 13-JUL-15 18:39:00 (CST-6)
Location: CLABURN
Magnitude: 2.50 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Tennis ball size hail fell resulting in minor roof and tree damage.  The hail also broke house windows.

Hail in COOK, ILLINOIS
From 13-JUL-15 18:40:00 to 13-JUL-15 18:42:00 (CST-6)
Location: BURNHAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar to golf ball size hail was reported at Sibley Boulevard and Burnham Avenue as well as 154th Place and Burnham Avenue.

Hail in DU PAGE, ILLINOIS
From 13-JUL-15 19:49:00 to 13-JUL-15 19:56:00 (CST-6)
Location: BELMONT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DU PAGE, ILLINOIS
From 13-JUL-15 19:52:00 to 13-JUL-15 20:00:00 (CST-6)
Location: FOUR LAKES
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Walnut to golf ball size hail was reported at Green Valley Nature Preserve and near Brown Court and Augustana Drive.

Hail in DU PAGE, ILLINOIS
From 13-JUL-15 19:56:00 to 13-JUL-15 19:56:00 (CST-6)
Location: LISLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in DU PAGE, ILLINOIS
From 13-JUL-15 19:59:00 to 13-JUL-15 19:59:00 (CST-6)
Location: BELMONT RD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BOONE, ILLINOIS
From 13-JUL-15 20:20:00 to 13-JUL-15 20:20:00 (CST-6)
Location: CAPRON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BOONE, ILLINOIS
From 13-JUL-15 20:31:00 to 13-JUL-15 20:31:00 (CST-6)
Location: CAPRON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines and 12 to 15 inch diameter branches were blown down near Hunter Road and Route 76.  A 15 inch diameter tree was snapped near Hunter Road and Le Roy Center Road.

Hail in MCHENRY, ILLINOIS
From 13-JUL-15 20:45:00 to 13-JUL-15 20:45:00 (CST-6)
Location: MARENGO
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter