Low pressure tracking from northern Missouri across north-central Illinois brought scattered thunderstorms to the area during the early morning hours of June 15th.  The thunderstorms produced bands of heavy rainfall and flash flooding along the Illinois River valley. A few of the storms also produced hail up to the size of nickels and damaging wind gusts of 60 to 70 mph.

Hail in KNOX, ILLINOIS
From 14-JUN-11 23:40:00 to 14-JUN-11 23:41:00 (CST-6)
Location: ABINGDON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in TAZEWELL, ILLINOIS
From 15-JUN-11 00:15:00 to 15-JUN-11 00:16:00 (CST-6)
Location: PEKIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LOGAN, ILLINOIS
From 15-JUN-11 01:02:00 to 15-JUN-11 01:03:00 (CST-6)
Location: ELKHART
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in LOGAN, ILLINOIS
From 15-JUN-11 01:20:00 to 15-JUN-11 01:30:00 (CST-6)
Location: MT PULASKI
Magnitude: 61.00 EG
Property damage: 85.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A barn was severely damaged, a lean-to shed was destroyed, the roof was blown off a machine shed, and 6 power poles were snapped west of Mt. Pulaski.

Hail in LOGAN, ILLINOIS
From 15-JUN-11 01:17:00 to 15-JUN-11 01:18:00 (CST-6)
Location: LINCOLN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Flash Flood in PEORIA, ILLINOIS
From 15-JUN-11 01:00:00 to 15-JUN-11 05:00:00 (CST-6)
Location: KICKAPOO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms moved along the Illinois River, producing a band of heavy rainfall in eastern Peoria County and the city of Peoria during the early morning hours. More than 2.50 of rain occurred in less than 90 minutes after Midnight LST. Many streets in Peoria were flooded, and numerous rural roads were impassable.

Flash Flood in TAZEWELL, ILLINOIS
From 15-JUN-11 01:00:00 to 15-JUN-11 05:00:00 (CST-6)
Location: PARKLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms moved along the Illinois River, producing a band of heavy rainfall in southwest Tazewell County during the early morning hours. More than 2.50 of rain occurred in less than 90 minutes after Midnight LST. Numerous rural roads were impassable.

Flash Flood in FULTON, ILLINOIS
From 15-JUN-11 01:00:00 to 15-JUN-11 05:00:00 (CST-6)
Location: BANNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms moved along the Illinois River, producing a band of heavy rainfall in northeast Fulton County during the early morning hours. More than 1.00 of rain occurred in less than 20 minutes after 0100 LST. Many streets in the town of Banner were flooded, and numerous rural roads were impassable along the Illinois River.

Flash Flood in MASON, ILLINOIS
From 15-JUN-11 02:30:00 to 15-JUN-11 06:00:00 (CST-6)
Location: BUZZVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms moved along the Illinois River, producing a band of heavy rainfall in northwest Mason County during the early morning hours. More than 2.00 of rain occurred in less than 90 minutes after Midnight LST. Many streets in the city of Manito were flooded, and numerous rural roads near the Illinois River were impassable.

Flash Flood in FULTON, ILLINOIS
From 15-JUN-11 01:45:00 to 15-JUN-11 05:00:00 (CST-6)
Location: MANLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A band of thunderstorms in western Fulton County produced rainfall rates of 1.00 to 1.50 per hour for about two hours during the early morning hours. Numerous rural roads were impassable, and State Highway 95 was covered with water.