Low pressure tracking along a nearly stationary frontal boundary brought severe thunderstorms into southeast Illinois during the afternoon of May 23rd.  The storms originated in southwest Missouri, then moved northeastward in the form of a bow echo into east-central and southeast Illinois.  Widespread winds of 60 to 70 mph downed numerous trees and powerlines along and southeast of an Effingham to Danville line.

Hail in RICHLAND, ILLINOIS
From 23-MAY-11 13:47:00 to 23-MAY-11 13:48:00 (CST-6)
Location: OLNEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in VERMILION, ILLINOIS
From 23-MAY-11 14:39:00 to 23-MAY-11 14:44:00 (CST-6)
Location: INDIANOLA
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A power pole was snapped and a 3-foot diameter tree was blown down 1 mile north of Indianola.

Thunderstorm Wind in EFFINGHAM, ILLINOIS
From 23-MAY-11 13:05:00 to 23-MAY-11 13:10:00 (CST-6)
Location: DIETERICH
Magnitude: 52.00 EG
Property damage: 85.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees and powerlines were blown down in Dieterich.  In addition, a 157-foot wireless internet tower was blown down and the roofs of a few homes lost shingles.

Thunderstorm Wind in EFFINGHAM, ILLINOIS
From 23-MAY-11 13:10:00 to 23-MAY-11 13:15:00 (CST-6)
Location: MASON
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous large tree limbs were blown down in Mason.

Thunderstorm Wind in CLAY, ILLINOIS
From 23-MAY-11 13:24:00 to 23-MAY-11 13:29:00 (CST-6)
Location: FLORA
Magnitude: 52.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several tree limbs were blown down.

Thunderstorm Wind in CLAY, ILLINOIS
From 23-MAY-11 13:25:00 to 23-MAY-11 13:30:00 (CST-6)
Location: FLORA
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous 6-inch diameter tree branches and powerlines were blown down on the northeast side of Flora.

Thunderstorm Wind in JASPER, ILLINOIS
From 23-MAY-11 13:30:00 to 23-MAY-11 13:35:00 (CST-6)
Location: ROSE HILL
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down into powerlines.

Thunderstorm Wind in CLAY, ILLINOIS
From 23-MAY-11 13:30:00 to 23-MAY-11 13:35:00 (CST-6)
Location: CLAY CITY
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down across Main Street in Clay City.

Thunderstorm Wind in JASPER, ILLINOIS
From 23-MAY-11 13:34:00 to 23-MAY-11 13:39:00 (CST-6)
Location: YALE
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down in Yale.

Thunderstorm Wind in RICHLAND, ILLINOIS
From 23-MAY-11 13:47:00 to 23-MAY-11 13:52:00 (CST-6)
Location: OLNEY
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous tree limbs and powerlines were blown down across Olney.

Thunderstorm Wind in CLARK, ILLINOIS
From 23-MAY-11 13:58:00 to 23-MAY-11 14:03:00 (CST-6)
Location: CASEY
Magnitude: 52.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down onto a house in Casey.

Thunderstorm Wind in CLARK, ILLINOIS
From 23-MAY-11 14:21:00 to 23-MAY-11 14:26:00 (CST-6)
Location: MARSHALL
Magnitude: 52.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A utility pole was blown down in Marshall.

Thunderstorm Wind in CRAWFORD, ILLINOIS
From 23-MAY-11 13:53:00 to 23-MAY-11 13:58:00 (CST-6)
Location: OBLONG
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree and several powerlines were blown down north of Oblong.  In addition, a large storage shed was damaged.

Thunderstorm Wind in EFFINGHAM, ILLINOIS
From 23-MAY-11 13:04:00 to 23-MAY-11 13:09:00 (CST-6)
Location: ALTAMONT
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several powerlines were blown down.