A bowing line of severe thunderstorms, known as a Derecho, raced across Iowa and Illinois during the early morning hours of July 21 producing
widespread wind damage in about a 60 mile wide swath just south of Interstate 80.  Winds gusting over 70 miles an hour toppled trees, ripped siding and shingles off homes and businesses, and left much of the region without power.  A tree fell onto a tent at the Indian Trails Resort in Colona, IL killing two children and a dog and injuring 4 other children.

Hail in WARREN, ILLINOIS
From 21-JUL-08 05:10:00 to 21-JUL-08 05:10:00 (CST-6)
Location: ELEANOR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail fell 5 miles northwest of Monmouth, IL at 610 am July 21.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: (MLI) QUAD CITY ARPT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Wind gusts estimated to be 80 mph snapped numerous trees off in the vicinity of the Quad City International Airport in Moline, IL at 615 am July 21.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: GREEN RIVER
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Wind gusts estimated to be 90 mph toppled over 100 trees at the Indian Trails Resort in Colona, IL around 615 am July 21.  One tree fell onto a tent killing a 4 year old boy and a 9 month old girl and injuring four other children.  A family pet (dog) was also killed.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:20:00 to 21-JUL-08 05:20:00 (CST-6)
Location: CAMBRIDGE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be at least 60 mph were observed 1 mile west of Cambridge, IL at 620 am July 21.

Hail in MERCER, ILLINOIS
From 21-JUL-08 05:10:00 to 21-JUL-08 05:10:00 (CST-6)
Location: GRIFFIN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail fell 2 miles north of New Windsor, IL at 610 am July 21.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 05:11:00 to 21-JUL-08 05:11:00 (CST-6)
Location: MOLINE
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 a large tree branch in Moline, IL at 611 am July 21.  A power outage was also observed.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 05:12:00 to 21-JUL-08 05:12:00 (CST-6)
Location: OAK GROVE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 80 mph were observed 4 miles south of Rock Island, IL at 612 am July 21.

Thunderstorm Wind in MERCER, ILLINOIS
From 21-JUL-08 05:13:00 to 21-JUL-08 05:13:00 (CST-6)
Location: SHERRARD
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 some large tree branches 1 mile west southwest of Sherrard, IL at 613 am July 21.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: WOODHULL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind gusts estimated to be 70 mph blew down several 8 to 10 inch diameter tree limbs in Woodhull, IL around 615 am July 21.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 05:00:00 to 21-JUL-08 05:00:00 (CST-6)
Location: ROCK IS
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 and branches on 26th Street in Rock Island, IL at 600 am July 21.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 04:48:00 to 21-JUL-08 04:48:00 (CST-6)
Location: ILLINOIS CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph blew several items off a porch of a residence in Illinois City, IL at 548 am July 21.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:10:00 to 21-JUL-08 05:10:00 (CST-6)
Location: GREEN ROCK
Magnitude: 61.00 EG
Property damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew down several trees along Highway 6 from Colona, IL toward Cambridge, IL around 610 am July 21.  Some of the trees were 24 inches in diameter.  Areas of flattened corn were also observed.

Thunderstorm Wind in MERCER, ILLINOIS
From 21-JUL-08 05:10:00 to 21-JUL-08 05:10:00 (CST-6)
Location: GRIFFIN
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph uprooted three mature trees, snapped 6 to 12 inch diameter tree limbs off of healthy trees, and ripped shingles off of some roofs about 2 miles north of New Windsor, IL at 610 am July 21.  In addition, the outer rows of some area corn fields were leaning over at a 45 degree angle.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:20:00 to 21-JUL-08 05:20:00 (CST-6)
Location: CAMBRIDGE
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew a tree down onto a garage about 1 mile west of Cambridge, IL at 620 am July 21.  Several four inch diameter branches were also blown down across the area.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 05:10:00 to 21-JUL-08 05:10:00 (CST-6)
Location: (MLI) QUAD CITY ARPT
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust measuring 81 mph was recorded by the Automated Surface Observing System (ASOS) at the Quad City International Airport in Moline, IL at 610 am July 21.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:25:00 to 21-JUL-08 05:25:00 (CST-6)
Location: GENESEO
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 75 mph blew down several large trees and damaged business signs and roofs mainly on the west side of Geneseo, IL around 625 am July 21.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:21:00 to 21-JUL-08 05:21:00 (CST-6)
Location: GREEN ROCK
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 across Highway 6 in Henry County Illinois around 621 am July 21 forcing its closure.

Thunderstorm Wind in HENRY, ILLINOIS
From 21-JUL-08 05:35:00 to 21-JUL-08 05:35:00 (CST-6)
Location: ATKINSON
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 75 mph snapped an 18 inch diameter spruce tree in half about 10 feet above the ground and damaged a chimney about 2 miles north northeast of Atkinson, IL at 635 am July 21.

Thunderstorm Wind in ROCK ISLAND, ILLINOIS
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: (MLI) QUAD CITY ARPT
Magnitude: 82.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A wind gust measuring 94 mph was recorded by a coastal observing system at the Quad City International Airport in Moline, IL at 615 am July 21.

Thunderstorm Wind in BUREAU, ILLINOIS
From 21-JUL-08 06:00:00 to 21-JUL-08 06:00:00 (CST-6)
Location: PRINCETON
Magnitude: 73.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust measuring 84 mph was recorded in Princeton, IL around 700 am July 21.

Thunderstorm Wind in MCDONOUGH, ILLINOIS
From 21-JUL-08 03:40:00 to 21-JUL-08 03:40:00 (CST-6)
Location: PRAIRIE CITY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Wind gusts estimated to be 60 to 70 mph blew some 7 to 8 inch diameter tree branches down in Prairie City, IL at 440 am July 21.

Thunderstorm Wind in MERCER, ILLINOIS
From 21-JUL-08 05:13:00 to 21-JUL-08 05:13:00 (CST-6)
Location: SHERRARD
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph were observed 1 mile west southwest of Sherrard, IL at 613 am July 21.

Thunderstorm Wind in BUREAU, ILLINOIS
From 21-JUL-08 06:05:00 to 21-JUL-08 06:05:00 (CST-6)
Location: PRINCETON
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 80 mph blew down numerous large trees up to 3 feet in diameter in and around Princeton, IL at 705 am July 21.

Thunderstorm Wind in BUREAU, ILLINOIS
From 21-JUL-08 06:00:00 to 21-JUL-08 06:00:00 (CST-6)
Location: PRINCETON
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 tree limbs in Princeton, IL around 700 am July 21.  A power outage was also observed.

Thunderstorm Wind in BUREAU, ILLINOIS
From 21-JUL-08 06:04:00 to 21-JUL-08 06:04:00 (CST-6)
Location: MALDEN
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 to 75 mph blew down some small trees and power lines near Malden, IL at 704 am July 21.

Thunderstorm Wind in PUTNAM, ILLINOIS
From 21-JUL-08 06:05:00 to 21-JUL-08 06:05:00 (CST-6)
Location: MC NABB
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 some large tree limbs about 3 miles west southwest of Mc Nabb, IL at 705 am July 21.

Thunderstorm Wind in WARREN, ILLINOIS
From 21-JUL-08 05:10:00 to 21-JUL-08 05:10:00 (CST-6)
Location: LITTLE YORK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph were observed 10 miles northwest of Monmouth, IL at 610 am July 21.

Thunderstorm Wind in BUREAU, ILLINOIS
From 21-JUL-08 05:59:00 to 21-JUL-08 05:59:00 (CST-6)
Location: PRINCETON
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 4 to 5 inch diameter tree branches about 1 mile northeast of Princeton, IL at 659 am July 21.