A strong cold front moved through eastern Iowa, northeast Missouri, and northern Illinois from June 12 through midday June 13 bringing very heavy rains of 1 to 5 inches, flash flooding, large hail, and damaging wind gusts to much of the region.

Hail in MERCER, ILLINOIS
From 12-JUN-08 18:40:00 to 12-JUN-08 18:40:00 (CST-6)
Location: NEW BOSTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Nickel-sized hail fell in New Boston, IL at 7:40 pm June 12.

Hail in ROCK ISLAND, ILLINOIS
From 12-JUN-08 18:40:00 to 12-JUN-08 18:40:00 (CST-6)
Location: BLACKHAWK STATE PARK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime-sized hail fell in Rock Island, IL at 7:40 pm June 12.  Very heavy rain and minor street flooding was also observed.

Hail in STEPHENSON, ILLINOIS
From 12-JUN-08 14:10:00 to 12-JUN-08 14:10:00 (CST-6)
Location: FREEPORT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball-sized hail fell along Highway 20 just south of Freeport, IL at 3:10 pm June 12.

Hail in STEPHENSON, ILLINOIS
From 12-JUN-08 14:15:00 to 12-JUN-08 14:15:00 (CST-6)
Location: RIDOTT
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tennis ball to baseball-sized hail fell in Ridott, IL at 3:15 pm June 12.  This report was relayed by a law enforcement official.

Hail in STEPHENSON, ILLINOIS
From 12-JUN-08 14:17:00 to 12-JUN-08 14:17:00 (CST-6)
Location: WINNESHIEK
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball-sized hail fell about 3 miles west northwest of Ridott, IL at 3:17 pm June 12.

Flash Flood in JO DAVIESS, ILLINOIS
From 12-JUN-08 22:00:00 to 13-JUN-08 10:00:00 (CST-6)
Location: NORTH HANOVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rains caused rapid rises of the Apple River during the late evening of June 12 and morning hours of June 13.  The Apple river overflowed its banks and was covering W Lone Street just west of Elizabeth, IL around 11:00 pm June 12.  The flash flood waters began to recede around mid morning June 13.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 12-JUN-08 14:15:00 to 12-JUN-08 14:15:00 (CST-6)
Location: FREEPORT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 60 mph blew down some 3 to6 inch diameter branches on Lamm Road near Freeport, IL at 3:15 pm June 12.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 12-JUN-08 14:10:00 to 12-JUN-08 14:10:00 (CST-6)
Location: FREEPORT
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph blew down some 12 inch diameter tree limbs and caused structural damage to some buildings along Highway 20 south of Freeport, IL around 3:10 pm June 12.

Thunderstorm Wind in JO DAVIESS, ILLINOIS
From 12-JUN-08 13:05:00 to 12-JUN-08 13:05:00 (CST-6)
Location: DERINDA CENTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph blew down some three inch diameter tree branches south of Derinda Center, IL at 2:05 pm June 12.

Thunderstorm Wind in CARROLL, ILLINOIS
From 12-JUN-08 17:25:00 to 12-JUN-08 17:25:00 (CST-6)
Location: MILLEDGEVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph blew down about six 8 to 10 inch diameter tree limbs in Milledgeville, IL at 6:25 pm June 12.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 12-JUN-08 22:35:00 to 12-JUN-08 22:35:00 (CST-6)
Location: STERLING
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 60 mph wind gust was measured in Sterling, IL at 11:35 pm June 12.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 12-JUN-08 21:50:00 to 12-JUN-08 21:50:00 (CST-6)
Location: PEARL CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph were observed in Pearl City, IL at 10:50 pm June 12.

Thunderstorm Wind in WHITESIDE, ILLINOIS
From 12-JUN-08 22:35:00 to 12-JUN-08 22:35:00 (CST-6)
Location: STERLING ARPT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A 64 mph wind gust was measured by the Automated Weather Observing System (AWOS) at the Whiteside County Airport about 4 miles south of Sterling, IL at 11:35 pm June 12.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 12-JUN-08 21:58:00 to 12-JUN-08 21:58:00 (CST-6)
Location: PEARL CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 60 mph blew down some 4 to 6 inch diameter branches in Pearl City, IL at 10:58 pm June 12.

Thunderstorm Wind in CARROLL, ILLINOIS
From 12-JUN-08 17:20:00 to 12-JUN-08 17:20:00 (CST-6)
Location: THOMSON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph blew down a large tree on Thomson Road just east of Thomson, IL around 6:20 pm June 12.

Thunderstorm Wind in CARROLL, ILLINOIS
From 12-JUN-08 18:00:00 to 12-JUN-08 18:00:00 (CST-6)
Location: MILLEDGEVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 60 mph blew down some two inch diameter tree branches in Milledgeville, IL at 7:00 pm June 12.

Thunderstorm Wind in BUREAU, ILLINOIS
From 12-JUN-08 22:35:00 to 12-JUN-08 22:35:00 (CST-6)
Location: SHEFFIELD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph were blew down a tree just north of Sheffield, IL at 11:35 pm June 12.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 12-JUN-08 18:47:00 to 12-JUN-08 18:47:00 (CST-6)
Location: MOLINE
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 65 mph blew down several trees and power lines in Moline, IL at 7:47 pm June 12.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 12-JUN-08 21:50:00 to 12-JUN-08 21:50:00 (CST-6)
Location: PEARL CITY
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph blew some tree limbs down onto some wires along Goldmine Road near Pearl City, IL at 10:50 pm June 12.

Thunderstorm Wind in BUREAU, ILLINOIS
From 12-JUN-08 22:35:00 to 12-JUN-08 22:35:00 (CST-6)
Location: MANLIUS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 65 mph blew down a tree in Manlius, IL at 11:35  pm June 12.

Thunderstorm Wind in BUREAU, ILLINOIS
From 12-JUN-08 22:38:00 to 12-JUN-08 22:38:00 (CST-6)
Location: NEW BEDFORD
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew down several trees in New Bedford, IL at 11:38 pm June 12.

Tornado in ROCK ISLAND, ILLINOIS
From 12-JUN-08 18:26:00 to 12-JUN-08 18:26:00 (CST-6)
Location: TAYLOR RIDGE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tornado was spotted by a law enforcement official about one mile west of Taylor Ridge, IL at 7:26 pm June 12.

Flash Flood in ROCK ISLAND, ILLINOIS
From 12-JUN-08 18:50:00 to 13-JUN-08 05:00:00 (CST-6)
Location: ILLINOIS CITY
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain resulted in flash flooding across much of Rock Island County during the evening of June 12.  In Andalusia, IL, ten inches of flood waters covered all the streets in town.  The town received about 3.5 inches of rain in an hour.  In Moline, IL, flash flood waters about two feet deep stranded some concert goers in the parking lot of the I Wireless Center.  Also, the 500 block of 1st Street and the 500 to 1100 blocks of 4th Street were closed due to sink holes.  In downtown Rock Island, IL, most of the streets were flooded with the flood waters about 1 foot deep.  Near Illinois City, IL, County Road 59 was washed out downhill from the Loud Thunder Forest Preserve entrance.  In Milan, IL, flash flooding forced the closure of numerous roads, including Route 67 and 4th Street W between 1st Avenue and 10th Avenue.

Hail in WHITESIDE, ILLINOIS
From 12-JUN-08 17:16:00 to 12-JUN-08 17:16:00 (CST-6)
Location: USTICK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail fell west of Ustick, IL at 6:16 pm June 12.

Hail in STEPHENSON, ILLINOIS
From 12-JUN-08 14:20:00 to 12-JUN-08 14:20:00 (CST-6)
Location: ROCK CITY
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter to baseball-sized hail fell in Rock City, IL at 3:20 pm June 12.