Elevated convection fired up across the region.  There were several reports of large hail, damaging winds and flash flooding with these storms.

Thunderstorm Wind in MONROE, ILLINOIS
From 17-JUN-11 11:30:00 to 17-JUN-11 11:30:00 (CST-6)
Location: WATERLOO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several large tree limbs.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 17-JUN-11 11:33:00 to 17-JUN-11 11:33:00 (CST-6)
Location: SWANSEA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a few trees near the intersection of Illinois Route 15 and Frank Scott Parkway.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 17-JUN-11 11:40:00 to 17-JUN-11 11:40:00 (CST-6)
Location: FREEBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large tree limbs along Wolf Road just west of Freeburg.

Hail in RANDOLPH, ILLINOIS
From 17-JUN-11 11:46:00 to 17-JUN-11 11:46:00 (CST-6)
Location: RED BUD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CLINTON, ILLINOIS
From 17-JUN-11 12:05:00 to 17-JUN-11 12:05:00 (CST-6)
Location: TRENTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several power lines in town.

Thunderstorm Wind in CLINTON, ILLINOIS
From 17-JUN-11 12:07:00 to 17-JUN-11 12:07:00 (CST-6)
Location: BREESE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several large tree limbs around town.

Thunderstorm Wind in CLINTON, ILLINOIS
From 17-JUN-11 12:15:00 to 17-JUN-11 12:15:00 (CST-6)
Location: CARLYLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down large tree limbs.

Thunderstorm Wind in WASHINGTON, ILLINOIS
From 17-JUN-11 12:15:00 to 17-JUN-11 12:15:00 (CST-6)
Location: HOYLETON
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MARION, ILLINOIS
From 17-JUN-11 12:40:00 to 17-JUN-11 12:40:00 (CST-6)
Location: SANDOVAL
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 17-JUN-11 11:45:00 to 17-JUN-11 11:45:00 (CST-6)
Location: NEW ATHENS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several trees and power lines.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 17-JUN-11 12:00:00 to 17-JUN-11 12:00:00 (CST-6)
Location: OLD MARISSA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew part of the metal roof off of a shed.  Also, several large trees, numerous tree limbs and power lines were blown down.

Thunderstorm Wind in MONROE, ILLINOIS
From 17-JUN-11 11:20:00 to 17-JUN-11 11:22:00 (CST-6)
Location: COLUMBIA GEBHARDT AR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a large tree and several large tree limbs along Illinois Route 3.  Also, numerous large tree limbs were blown down around town and several power lines were knocked down by the fallen tree limbs.  One large tree limb landed on a carport causing it to collapse.  A truck parked under the carport suffered extensive damage.