Scattered thunderstorms developed during the afternoon and early evening hours ahead of a cold front.  The initial storms produced a few severe wind gusts, though the storms rapidly evolved to significant hail producers.

Hail in KNOX, ILLINOIS
From 13-MAY-08 16:30:00 to 13-MAY-08 16:30:00 (CST-6)
Location: UNIONTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in PEORIA, ILLINOIS
From 13-MAY-08 16:45:00 to 13-MAY-08 16:59:00 (CST-6)
Location: (PIA)GTR PEORIA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WOODFORD, ILLINOIS
From 13-MAY-08 17:06:00 to 13-MAY-08 17:14:00 (CST-6)
Location: METAMORA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MCLEAN, ILLINOIS
From 13-MAY-08 17:36:00 to 13-MAY-08 18:10:00 (CST-6)
Location: BLOOMINGTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCLEAN, ILLINOIS
From 13-MAY-08 18:13:00 to 13-MAY-08 18:28:00 (CST-6)
Location: STANFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SCHUYLER, ILLINOIS
From 13-MAY-08 12:55:00 to 13-MAY-08 12:55:00 (CST-6)
Location: HUNTSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickle to quarter size hail covered the ground.

Hail in FULTON, ILLINOIS
From 13-MAY-08 13:45:00 to 13-MAY-08 13:45:00 (CST-6)
Location: MARIETTA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in FULTON, ILLINOIS
From 13-MAY-08 16:24:00 to 13-MAY-08 16:30:00 (CST-6)
Location: FARMINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One inch diameter hail covered the ground.

Hail in PEORIA, ILLINOIS
From 13-MAY-08 16:25:00 to 13-MAY-08 16:25:00 (CST-6)
Location: PRINCEVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MENARD, ILLINOIS
From 13-MAY-08 13:11:00 to 13-MAY-08 13:11:00 (CST-6)
Location: CULVER
Magnitude: 55.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong winds broke off the top of a couple healthy trees.  The winds also caused minor roof damage to an outbuilding and a barn.

Thunderstorm Wind in MASON, ILLINOIS
From 13-MAY-08 13:00:00 to 13-MAY-08 13:00:00 (CST-6)
Location: LONG BRANCH
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A portion of the roof was blown off an airplane hanger.  Also, several trees were blown down.

Hail in CHAMPAIGN, ILLINOIS
From 13-MAY-08 19:58:00 to 13-MAY-08 19:58:00 (CST-6)
Location: MAHOMET
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in TAZEWELL, ILLINOIS
From 13-MAY-08 16:49:00 to 13-MAY-08 16:59:00 (CST-6)
Location: WASHINGTON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One to two inch diameter hail was reported between East Peoria, Morton, and Washington.

Hail in KNOX, ILLINOIS
From 13-MAY-08 15:30:00 to 13-MAY-08 16:02:00 (CST-6)
Location: GALESBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager