A cold front over northeast Iowa and northern Illinois combined with an unstable air mass to produce thunderstorms during the late afternoon and  evening of June 21st.  The stronger storms produced damaging winds and large hail.  Heavy rain was also common with the storms, which caused some flooding.

Thunderstorm Wind in WASHINGTON, IOWA
From 21-JUN-07 18:20:00 to 21-JUN-07 18:20:00 (CST-6)
Location: WELLMAN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were downed by strong thunderstorm wind gusts.

Thunderstorm Wind in WASHINGTON, IOWA
From 21-JUN-07 18:34:00 to 21-JUN-07 18:34:00 (CST-6)
Location: WASHINGTON
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A roof of a mobile home was blown off.  It then struck another mobile home nearby.  Delayed report.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUN-07 19:00:00 to 21-JUN-07 19:00:00 (CST-6)
Location: MUSCATINE
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree limb 1.5 feet in diameter was downed over some power lines.  Power service was out in the Hershey Manor area.

Lightning in JOHNSON, IOWA
From 21-JUN-07 19:18:00 to 21-JUN-07 19:18:00 (CST-6)
Location: SOLON
Property damage: 0.20K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was struck by lightning splitting it in half.

Lightning in CEDAR, IOWA
From 21-JUN-07 19:20:00 to 21-JUN-07 19:20:00 (CST-6)
Location: CLARENCE
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A house was struck by lightning knocking the chimney off and causing some electrical wiring damage.

Thunderstorm Wind in SCOTT, IOWA
From 21-JUN-07 19:20:00 to 21-JUN-07 19:20:00 (CST-6)
Location: DAVENPORT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Utility Company

Branches were downed onto power lines.

Thunderstorm Wind in DES MOINES, IOWA
From 21-JUN-07 19:27:00 to 21-JUN-07 19:27:00 (CST-6)
Location: MEDIAPOLIS
Magnitude: 52.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Trees were downed and roof shingles were ripped off.

Hail in IOWA, IOWA
From 21-JUN-07 16:53:00 to 21-JUN-07 16:53:00 (CST-6)
Location: NORTH ENGLISH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Nickel size hail fell in North English.

Hail in BUCHANAN, IOWA
From 21-JUN-07 17:00:00 to 21-JUN-07 17:00:00 (CST-6)
Location: AURORA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BENTON, IOWA
From 21-JUN-07 17:12:00 to 21-JUN-07 17:12:00 (CST-6)
Location: MT AUBURN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LEE, IOWA
From 21-JUN-07 19:30:00 to 21-JUN-07 19:30:00 (CST-6)
Location: FT MADISON
Magnitude: 52.00 EG
Property damage: 0.20K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree branches and signs were blown over.

Thunderstorm Wind in DES MOINES, IOWA
From 21-JUN-07 19:30:00 to 21-JUN-07 19:30:00 (CST-6)
Location: BURLINGTON
Magnitude: 60.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree branches were downed across the city.  Time estimated.

Thunderstorm Wind in DES MOINES, IOWA
From 21-JUN-07 19:40:00 to 21-JUN-07 19:40:00 (CST-6)
Location: MEDIAPOLIS
Magnitude: 65.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree branch 8 inches in diameter was blown down covering part of the road between Orchard and Harrison streets.

Hail in IOWA, IOWA
From 21-JUN-07 17:30:00 to 21-JUN-07 17:30:00 (CST-6)
Location: VICTOR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Dime size hail fell about a half mile east of Victor, IA.

Thunderstorm Wind in BENTON, IOWA
From 21-JUN-07 17:41:00 to 21-JUN-07 17:41:00 (CST-6)
Location: SHELLSBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BENTON, IOWA
From 21-JUN-07 17:41:00 to 21-JUN-07 17:41:00 (CST-6)
Location: VINTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENTON, IOWA
From 21-JUN-07 17:41:00 to 21-JUN-07 17:41:00 (CST-6)
Location: SHELLSBURG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENTON, IOWA
From 21-JUN-07 17:42:00 to 21-JUN-07 17:42:00 (CST-6)
Location: VINTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BENTON, IOWA
From 21-JUN-07 18:02:00 to 21-JUN-07 18:02:00 (CST-6)
Location: SHELLSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LINN, IOWA
From 21-JUN-07 18:15:00 to 21-JUN-07 18:15:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm wind gust was estimated at 60 mph near the intersection of Edgewood Rd and Highway 30.  Very heavy rainfall was also noted.

Hail in IOWA, IOWA
From 21-JUN-07 17:45:00 to 21-JUN-07 17:45:00 (CST-6)
Location: HOLBROOK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter