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.

Hail in JOHNSON, IOWA
From 21-JUL-08 03:47:00 to 21-JUL-08 03:47:00 (CST-6)
Location: LONE TREE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail fell in Lone Tree, IA from 447 am to 451 am July 21.  This report was relayed by another trained spotter in Iowa City.

Hail in JOHNSON, IOWA
From 21-JUL-08 04:15:00 to 21-JUL-08 04:15:00 (CST-6)
Location: RIVER JCT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail fell 10 miles south of Iowa City, IA at 515 am July 21.

Hail in MUSCATINE, IOWA
From 21-JUL-08 04:21:00 to 21-JUL-08 04:21:00 (CST-6)
Location: MUSCATINE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny-sized hail fell 1 mile north of Muscatine, IA at 521 am July 21.

Thunderstorm Wind in HENRY, IOWA
From 21-JUL-08 02:24:00 to 21-JUL-08 02:24:00 (CST-6)
Location: MT PLEASANT MUNI ARP
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A 72 mph wind gust was measured at the Mount Pleasant Municipal Airport in Mount Pleasant, IA at 324 am July 21.

Thunderstorm Wind in HENRY, IOWA
From 21-JUL-08 02:30:00 to 21-JUL-08 02:30:00 (CST-6)
Location: MT PLEASANT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated to be 70 mph snapped a tree in half and blew down numerous 4 to 5 inch diameter branches in Mount Pleasant, IA around 330 am July 21.

Hail in HENRY, IOWA
From 21-JUL-08 02:15:00 to 21-JUL-08 02:15:00 (CST-6)
Location: OAKLAND MILLS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Nickel-sized hail fell 3 miles west of Oakland Mills, IA at 315 am July 21.

Hail in JEFFERSON, IOWA
From 21-JUL-08 02:57:00 to 21-JUL-08 02:57:00 (CST-6)
Location: FAIRFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail fell 1 mile northwest of Fairfield, IA at 357 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:54:00 to 21-JUL-08 04:54:00 (CST-6)
Location: MUSCATINE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A wind gust measuring 59 mph was observed 2 miles north of Muscatine, IA at 554 am July 21.  Several large trees were blown down across the area.  The largest tree measured 3 feet in diameter.  Heavy rains, measuring 1.39 inches in 30 minutes, resulted in some minor street flooding in the area.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:55:00 to 21-JUL-08 04:55:00 (CST-6)
Location: MONTPELIER
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew several large tree branches down and ripped some siding off a residence in Montpelier, IA at 555 am July 21.  A power outage was also observed.

Thunderstorm Wind in SCOTT, IOWA
From 21-JUL-08 05:01:00 to 21-JUL-08 05:01:00 (CST-6)
Location: MAYSVILLE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust measuring 59 mph was recorded by the Roadway Weather Information System at the I-80 and I-280 interchange located approximately 7 miles northwest of Davenport, IA at 601 am July 21.

Lightning in DELAWARE, IOWA
From 23-JUL-08 03:18:00 to 23-JUL-08 03:18:00 (CST-6)
Location: MANCHESTER
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck the Delaware County Courthouse at 418 am July 21 damaging the roof, security camera system, elevator, telephone system, and wireless connection to the engineer's office.

Thunderstorm Wind in JOHNSON, IOWA
From 21-JUL-08 04:00:00 to 21-JUL-08 04:15:00 (CST-6)
Location: SHARON CENTER
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph caused widespread wind damage from Sharon Center, IA to Lone Tree, IA between 500 am and 515 am July 21.  Numerous trees and utility poles were blown down.  Also a sign and awning were damaged at a gas station near Hills, IA.

Thunderstorm Wind in JOHNSON, IOWA
From 21-JUL-08 04:15:00 to 21-JUL-08 04:15:00 (CST-6)
Location: RIVER JCT
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 10 miles south of Iowa City, IA at 515 am July 21.

Thunderstorm Wind in WASHINGTON, IOWA
From 21-JUL-08 04:13:00 to 21-JUL-08 04:13:00 (CST-6)
Location: WASHINGTON
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 some tree limbs in Washington, IA around 513 am July 21.

Thunderstorm Wind in JOHNSON, IOWA
From 21-JUL-08 04:15:00 to 21-JUL-08 04:15:00 (CST-6)
Location: HILLS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew a pine tree down and a picnic table off a deck about 7 miles north of Riverside, IA at 515 am July 21.

Thunderstorm Wind in JOHNSON, IOWA
From 21-JUL-08 04:16:00 to 21-JUL-08 04:16:00 (CST-6)
Location: LONE TREE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wind gusts estimated to be 70 mph were observed in Lone Tree, IA at 516 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:33:00 to 21-JUL-08 04:33:00 (CST-6)
Location: MUSCATINE MUNI ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A wind gust measuring 63 mph was observed by the Automated Weather Observing System (AWOS) at the Muscatine Municipal Airport about 1 mile north northwest of Fruitland, IA at 533 am July 21.

Thunderstorm Wind in JOHNSON, IOWA
From 21-JUL-08 04:28:00 to 21-JUL-08 04:28:00 (CST-6)
Location: LONE TREE
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wind gusts estimated to be 75 mph blew down several large tree limbs in Lone Tree, IA at 528 am July 21.  Some of the limbs were 12 inches in diameter.  A power outage was also observed.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:35:00 to 21-JUL-08 04:35:00 (CST-6)
Location: MUSCATINE
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 3 miles east northeast of Muscatine, IA at 535 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:45:00 to 21-JUL-08 04:45:00 (CST-6)
Location: MUSCATINE
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 in Muscatine, IA at 545 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:45:00 to 21-JUL-08 04:45:00 (CST-6)
Location: MUSCATINE
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph blew down some 8 inch diameter tree limbs in Muscatine, IA at 545 am July 21.  A power outage was also observed.

Thunderstorm Wind in SCOTT, IOWA
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: PANORAMA PARK
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts estimated to be 60 to 65 mph blew a 6 inch diameter tree branch down near Utica Ridge Road and 53rd Street in Davenport, IA around 615 am July 21.

Thunderstorm Wind in SCOTT, IOWA
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: PANORAMA PARK
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts estimated to be 65 mph blew a 12 inch diameter tree down near 18th Street and Tanglefoot Lane in Bettendorf, IA around 615 am July 21.

Thunderstorm Wind in SCOTT, IOWA
From 21-JUL-08 05:15:00 to 21-JUL-08 05:15:00 (CST-6)
Location: PANORAMA PARK
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph uprooted many trees in Bettendorf, IA around 615 am July 21.  Some area roads were covered with storm damage debris.  A power outage was also observed.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:45:00 to 21-JUL-08 04:45:00 (CST-6)
Location: MUSCATINE
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds estimated to be 70 mph blew a shed into a ditch, blew highway signs over, and blew trees down across Highway 61 approximately 4 miles northeast of Muscatine, IA around 545 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:45:00 to 21-JUL-08 04:45:00 (CST-6)
Location: MUSCATINE
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 70 mph blew down several trees and branches across Muscatine, IA around 545 am July 21.  Some of the trees fell across Mulberry Avenue.  Some homes were also damaged and a power outage was observed.

Thunderstorm Wind in IOWA, IOWA
From 21-JUL-08 03:30:00 to 21-JUL-08 03:30:00 (CST-6)
Location: VICTOR
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 65 mph blew down some 4 to 6 inch diameter branches in Victor, IA around 430 am July 21.

Thunderstorm Wind in KEOKUK, IOWA
From 21-JUL-08 03:44:00 to 21-JUL-08 03:44:00 (CST-6)
Location: DELTA
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust measuring 66 mph was recorded by the Roadway Weather Information System (RWIS) located approximately 5.5 miles west of Sigourney, IA at 444 am July 21.

Thunderstorm Wind in IOWA, IOWA
From 21-JUL-08 03:45:00 to 21-JUL-08 03:45:00 (CST-6)
Location: WILLIAMSBURG
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated to be 70 mph blew the roof off of a car wash about 1 mile north of Williamsburg, IA around 445 am July 21.  This report was relayed by a broadcast media partner.

Thunderstorm Wind in IOWA, IOWA
From 21-JUL-08 03:45:00 to 21-JUL-08 03:45:00 (CST-6)
Location: WILLIAMSBURG
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wind gusts estimated to be 70 mph blew down several trees in Williamsburg, IA around 445 am July 21.  This report was relayed by a broadcast media partner.

Thunderstorm Wind in BENTON, IOWA
From 21-JUL-08 03:55:00 to 21-JUL-08 03:55:00 (CST-6)
Location: NORWAY
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust measuring 60 mph was observed in Norway, IA at 455 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:46:00 to 21-JUL-08 04:46:00 (CST-6)
Location: MUSCATINE
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 trees in Muscatine, IA at 546 am July 21.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-08 04:46:00 to 21-JUL-08 04:46:00 (CST-6)
Location: MUSCATINE
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust measuring 61 mph was observed in Muscatine, IA at 546 am July 21.

Hail in HENRY, IOWA
From 21-JUL-08 02:30:00 to 21-JUL-08 02:30:00 (CST-6)
Location: MT PLEASANT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny-sized hail fell in Mount Pleasant, IA around 330 am July 21.

Thunderstorm Wind in IOWA, IOWA
From 21-JUL-08 03:30:00 to 21-JUL-08 03:30:00 (CST-6)
Location: VICTOR
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust exceeding 70 knots (81 mph) was measured in Victor, IA around 430 am July 21.