Strong to severe thunderstorms moved across parts of northern Illinois during the afternoon of September 3rd.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 03-SEP-11 13:00:00 to 03-SEP-11 13:00:00 (CST-6)
Location: PERU
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind gusts were estimated to 60 mph.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 03-SEP-11 13:15:00 to 03-SEP-11 13:15:00 (CST-6)
Location: PERU
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in GRUNDY, ILLINOIS
From 03-SEP-11 13:12:00 to 03-SEP-11 13:12:00 (CST-6)
Location: MORRIS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree 24 inches in diameter was blown down onto a garage.  Several tree limbs up to 6 inches in diameter were also blown down.

Hail in LA SALLE, ILLINOIS
From 03-SEP-11 13:15:00 to 03-SEP-11 13:15:00 (CST-6)
Location: LA SALLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LA SALLE, ILLINOIS
From 03-SEP-11 13:15:00 to 03-SEP-11 13:15:00 (CST-6)
Location: LA SALLE
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 03-SEP-11 13:20:00 to 03-SEP-11 13:20:00 (CST-6)
Location: GOODINGS GROVE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail was reported near the intersection for 143rd and Golden Oak Streets.

Hail in LA SALLE, ILLINOIS
From 03-SEP-11 13:29:00 to 03-SEP-11 13:36:00 (CST-6)
Location: OTTAWA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter size hail was reported in many areas around Ottawa including quarter size hail near Interstate 80 and Route 23.

Hail in WILL, ILLINOIS
From 03-SEP-11 13:39:00 to 03-SEP-11 13:41:00 (CST-6)
Location: ELWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WILL, ILLINOIS
From 03-SEP-11 13:40:00 to 03-SEP-11 13:41:00 (CST-6)
Location: BLODGETT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Half dollar size hail was reported in McKinley Woods Forest Preserve.

Hail in COOK, ILLINOIS
From 03-SEP-11 13:43:00 to 03-SEP-11 13:44:00 (CST-6)
Location: LAMBERT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported near Southwest Highway and Route 83.

Hail in COOK, ILLINOIS
From 03-SEP-11 13:47:00 to 03-SEP-11 13:48:00 (CST-6)
Location: WORTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in COOK, ILLINOIS
From 03-SEP-11 13:48:00 to 03-SEP-11 13:48:00 (CST-6)
Location: WORTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 60 mph.  Small tree limbs were blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 03-SEP-11 13:50:00 to 03-SEP-11 13:50:00 (CST-6)
Location: CHICAGO RIDGE
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A wind gust to 62 mph was measured in Chicago Ridge and five inch diameter tree limbs were blown down.