A strong cold front was moving through the region, triggering showers and thunderstorms.  There were numerous reports of large hail and damaging winds.

Flash Flood in RANDOLPH, ILLINOIS
From 21-JUN-11 21:00:00 to 22-JUN-11 02:00:00 (CST-6)
Location: COULTERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Between 2 and 3 inches of rain fell onto already saturated soils causing flash flooding.  Several roads were flooded including Illinois Route 153 southwest of Coulterville.  There was up to a foot and a half of water over Illinois Route 153 in several locations.

Flash Flood in WASHINGTON, ILLINOIS
From 21-JUN-11 21:15:00 to 22-JUN-11 02:00:00 (CST-6)
Location: OKAWVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Up to three inches of rain fell onto already saturated soils causing flash flooding.  Several roads were flooded including Illinois Routes 160 and 15 between Addieville and Nashville.

Thunderstorm Wind in MONROE, ILLINOIS
From 21-JUN-11 13:57:00 to 21-JUN-11 13:57:00 (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.

Hail in MONROE, ILLINOIS
From 21-JUN-11 13:55:00 to 21-JUN-11 13:55:00 (CST-6)
Location: FOSTER POND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in RANDOLPH, ILLINOIS
From 21-JUN-11 14:30:00 to 21-JUN-11 14:31:00 (CST-6)
Location: SPARTA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down numerous large tree limbs.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 21-JUN-11 14:33:00 to 21-JUN-11 14:33:00 (CST-6)
Location: OLD MARISSA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several large trees and power lines.

Thunderstorm Wind in WASHINGTON, ILLINOIS
From 21-JUN-11 14:48:00 to 21-JUN-11 14:48:00 (CST-6)
Location: OKAWVILLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large trees and numerous tree limbs.  One tree fell onto a home causing moderate damage and another tree fell onto a garage causing moderate damage.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 21-JUN-11 14:40:00 to 21-JUN-11 14:40:00 (CST-6)
Location: ST LIBORY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew off part of the roof of a business.  Also, several trees and numerous tree limbs were blown down.  On tree fell onto the corner of a garage causing moderate damage and extensive damage to a car parked outside of the garage.  Just to the northwest of town, an old wooden barn was blown down.

Thunderstorm Wind in CLINTON, ILLINOIS
From 21-JUN-11 14:48:00 to 21-JUN-11 14:50:00 (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.

Thunderstorm Wind in WASHINGTON, ILLINOIS
From 21-JUN-11 15:00:00 to 21-JUN-11 15:00:00 (CST-6)
Location: HOYLETON
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CLINTON, ILLINOIS
From 21-JUN-11 15:13:00 to 21-JUN-11 15:13:00 (CST-6)
Location: KEYESPORT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a large tree onto the roof of a home causing moderate damage.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 21-JUN-11 14:03:00 to 21-JUN-11 14:03:00 (CST-6)
Location: PADERBORN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds snapped off a couple of power poles just east of Paderborn.

Thunderstorm Wind in FAYETTE, ILLINOIS
From 21-JUN-11 15:30:00 to 21-JUN-11 15:30:00 (CST-6)
Location: VANDALIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down numerous large tree limbs and one large tree.

Thunderstorm Wind in BOND, ILLINOIS
From 21-JUN-11 15:13:00 to 21-JUN-11 15:13:00 (CST-6)
Location: DURLEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a couple of large trees and numerous tree limbs around town.  Also, a couple of power lines were blown down.  One tree fell across a road blocking it and part of it landed on an unoccupied car, which sustained significant damage.

Thunderstorm Wind in RANDOLPH, ILLINOIS
From 21-JUN-11 17:40:00 to 21-JUN-11 17:40:00 (CST-6)
Location: MENARD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down several trees blocking a rural road just east of town.

Hail in MONROE, ILLINOIS
From 21-JUN-11 18:55:00 to 21-JUN-11 18:55:00 (CST-6)
Location: HECKER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 21-JUN-11 18:55:00 to 21-JUN-11 18:55:00 (CST-6)
Location: LEMENTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds snapped off several power poles along Calamus Lake School Road.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 21-JUN-11 19:15:00 to 21-JUN-11 19:15:00 (CST-6)
Location: OLD MARISSA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a tree onto a house causing moderate damage.

Thunderstorm Wind in WASHINGTON, ILLINOIS
From 21-JUN-11 19:47:00 to 21-JUN-11 19:47:00 (CST-6)
Location: BIDDLEBORN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several trees.

Thunderstorm Wind in WASHINGTON, ILLINOIS
From 21-JUN-11 20:00:00 to 21-JUN-11 20:00:00 (CST-6)
Location: OAKDALE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several trees in Oakdale.

Thunderstorm Wind in MARION, ILLINOIS
From 21-JUN-11 15:20:00 to 21-JUN-11 15:20:00 (CST-6)
Location: SALEM
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm wind blew down several large trees and numerous tree limbs around town.  Several large branches landed on homes causing minor to moderate roof damage.

Thunderstorm Wind in CLINTON, ILLINOIS
From 21-JUN-11 14:52:00 to 21-JUN-11 14:52:00 (CST-6)
Location: BARTELSO
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew some shingles off of a roof and blew down a section of fence in town.  The winds also blew down a hay shed into a nearby pond.

Hail in ST. CLAIR, ILLINOIS
From 21-JUN-11 14:33:00 to 21-JUN-11 14:33:00 (CST-6)
Location: OLD MARISSA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in RANDOLPH, ILLINOIS
From 21-JUN-11 18:00:00 to 21-JUN-11 18:00:00 (CST-6)
Location: STEELEVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement