Late afternoon and evening severe thunderstorms triggered by a northward moving warm front produced hail, wind damage, a couple of small tornadoes, and localized flash flooding across West Central and Southwest Illinois.

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:47:00 to 30-MAY-08 21:47:00 (CST-6)
Location: SHILOH
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ADAMS, ILLINOIS
From 30-MAY-08 16:45:00 to 30-MAY-08 16:45:00 (CST-6)
Location: QUINCY
Magnitude: 1.00 
Reported by: Trained Spotter

Storm spotters reported hail from nickel size to one inch.

Hail in MADISON, ILLINOIS
From 30-MAY-08 18:30:00 to 30-MAY-08 18:30:00 (CST-6)
Location: TROY
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in MACOUPIN, ILLINOIS
From 30-MAY-08 19:55:00 to 30-MAY-08 19:55:00 (CST-6)
Location: BRIGHTON
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in MACOUPIN, ILLINOIS
From 30-MAY-08 20:06:00 to 30-MAY-08 20:08:00 (CST-6)
Location: SHIPMAN
Magnitude: 1.00 
Reported by: Amateur Radio

Amateur radio spotters reported hail from three quarters of an inch to one inch from near Shipman to west of Bunker Hill.

Thunderstorm Wind in MADISON, ILLINOIS
From 30-MAY-08 20:25:00 to 30-MAY-08 20:25:00 (CST-6)
Location: BETHALTO
Magnitude: 55.00 EG
Reported by: Trained Spotter

Storm spotters reported power lines down.

Hail in MADISON, ILLINOIS
From 30-MAY-08 20:25:00 to 30-MAY-08 20:25:00 (CST-6)
Location: BETHALTO
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in MADISON, ILLINOIS
From 30-MAY-08 20:32:00 to 30-MAY-08 20:40:00 (CST-6)
Location: WORDEN
Magnitude: 2.00 
Reported by: Trained Spotter

Storm spotters reported hail ranging from 1.25 inch in Alhanbra to two inch hail in Worden. The hail fell for nearly 10 minutes.

Hail in BOND, ILLINOIS
From 30-MAY-08 21:02:00 to 30-MAY-08 21:02:00 (CST-6)
Location: POCAHONTAS
Magnitude: 0.75 
Reported by: Amateur Radio

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:50:00 to 30-MAY-08 21:50:00 (CST-6)
Location: BELLEVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio spotters reported a four inch diameter tree limb down on Centerville Ave.

Thunderstorm Wind in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:55:00 to 30-MAY-08 21:55:00 (CST-6)
Location: MASCOUTAH
Magnitude: 58.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The local 911 center reported many tree limbs down on streets in Mascoutah. Minor roof damage was also reported.

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:55:00 to 30-MAY-08 21:55:00 (CST-6)
Location: MASCOUTAH
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:56:00 to 30-MAY-08 21:56:00 (CST-6)
Location: MASCOUTAH
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in CLINTON, ILLINOIS
From 30-MAY-08 22:00:00 to 30-MAY-08 22:00:00 (CST-6)
Location: NEW BADEN
Magnitude: 58.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio spotters reported a power pole down just south of New Baden on Route 160.

Hail in CLINTON, ILLINOIS
From 30-MAY-08 22:01:00 to 30-MAY-08 22:01:00 (CST-6)
Location: NEW BADEN
Magnitude: 0.75 
Reported by: Public

Tornado in PIKE, ILLINOIS
From 30-MAY-08 15:25:00 to 30-MAY-08 15:27:00 (CST-6)
Location: NEW SALEM
Tornado F-scale: EF1
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado formed about 1 mile north of I-72 near mile marker 31. The tornado initially damaged trees, then moved east and destroyed a machine shed about 1/2 mile north of County Roads 1900N and 2800E. Debris from the machine shed was thrown over 1/2 mile to the east and northeast.

Hail in PIKE, ILLINOIS
From 30-MAY-08 15:10:00 to 30-MAY-08 15:10:00 (CST-6)
Location: BARRY
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in PIKE, ILLINOIS
From 30-MAY-08 15:25:00 to 30-MAY-08 15:25:00 (CST-6)
Location: NEW SALEM
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm spotters reported a machine shed destroyed by thunderstorm winds.

Hail in BROWN, ILLINOIS
From 30-MAY-08 15:55:00 to 30-MAY-08 15:55:00 (CST-6)
Location: MT STERLING
Magnitude: 0.75 
Reported by: Law Enforcement

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:33:00 to 30-MAY-08 21:33:00 (CST-6)
Location: DUPO
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:38:00 to 30-MAY-08 21:38:00 (CST-6)
Location: BELLEVILLE
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:43:00 to 30-MAY-08 21:43:00 (CST-6)
Location: BELLEVILLE
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:43:00 to 30-MAY-08 21:43:00 (CST-6)
Location: SWANSEA
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:44:00 to 30-MAY-08 21:44:00 (CST-6)
Location: BELLEVILLE
Magnitude: 1.00 
Reported by: Amateur Radio

Amateur radio spotters reported hail from nickel to quarter size at Route 13 and 159.

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:45:00 to 30-MAY-08 21:45:00 (CST-6)
Location: BELLEVILLE
Magnitude: 1.75 
Reported by: Amateur Radio

Amateur radio spotters reported hail up to golfball size.

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:47:00 to 30-MAY-08 21:47:00 (CST-6)
Location: BELLEVILLE
Magnitude: 1.25 
Reported by: Trained Spotter

Flash Flood in MADISON, ILLINOIS
From 30-MAY-08 22:00:00 to 31-MAY-08 01:00:00 (CST-6)
Location: GODFREY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain caused localized flash flodding in Northeast Madison County. Highway 140 in Bethalto near the intersection South Prairie Road has to be closed.

Flash Flood in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:30:00 to 31-MAY-08 04:30:00 (CST-6)
Location: EAST ST LOUIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain caused localized flash flooding across northern St. Clair County. Highways 151, 159, and 13 were all reported flooded.

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:51:00 to 30-MAY-08 21:51:00 (CST-6)
Location: (BLV)SCOTT AFB BELLE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ST. CLAIR, ILLINOIS
From 30-MAY-08 21:34:00 to 30-MAY-08 21:34:00 (CST-6)
Location: CAHOKIA
Magnitude: 1.75 
Reported by: Law Enforcement

Local law enforcement reported hail up to golfball size.

Tornado in PIKE, ILLINOIS
From 30-MAY-08 17:15:00 to 30-MAY-08 17:20:00 (CST-6)
Location: PITTSFIELD
Tornado F-scale: EF0
Reported by: NWS Storm Survey

The tornado hit a rural area near Pittsfield and Detroit and only caused tree damage along its path.