An upper level disturbance interacted with a nearly stationary front to trigger a cluster of severe thunderstorms across northeast Iowa during the evening of July 16. Law enforcement officials, storm spotters and amateur radio operators reported hail up to the size of golf balls.

Hail in FLOYD, IOWA
From 16-JUL-07 16:45:00 to 16-JUL-07 16:45:00 (CST-6)
Location: POWERSVILLE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 15.00K
Reported by: Law Enforcement

Reported near county line.

Hail in FAYETTE, IOWA
From 16-JUL-07 17:20:00 to 16-JUL-07 17:25:00 (CST-6)
Location: ALPHA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Public

Hail lasted several days.

Hail in FAYETTE, IOWA
From 16-JUL-07 17:24:00 to 16-JUL-07 17:24:00 (CST-6)
Location: ALPHA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in FAYETTE, IOWA
From 16-JUL-07 17:27:00 to 16-JUL-07 17:27:00 (CST-6)
Location: ALPHA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail diameter varied from nickel to dime size.

Hail in FAYETTE, IOWA
From 16-JUL-07 17:31:00 to 16-JUL-07 17:31:00 (CST-6)
Location: HAWKEYE
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 7.50K
Reported by: Public

Hail did not last long.

Hail in HOWARD, IOWA
From 16-JUL-07 18:13:00 to 16-JUL-07 18:13:00 (CST-6)
Location: BONAIR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in HOWARD, IOWA
From 16-JUL-07 18:14:00 to 16-JUL-07 18:14:00 (CST-6)
Location: VERNON SPGS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail covered the road.

Hail in HOWARD, IOWA
From 16-JUL-07 18:38:00 to 16-JUL-07 18:38:00 (CST-6)
Location: PROTIVIN
Magnitude: 1.50 
Property damage: 8.00K
Crop damage: 12.50K
Reported by: Public

Hail in HOWARD, IOWA
From 16-JUL-07 16:06:00 to 16-JUL-07 16:06:00 (CST-6)
Location: VERNON SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Public

Hail in HOWARD, IOWA
From 16-JUL-07 16:30:00 to 16-JUL-07 16:30:00 (CST-6)
Location: PROTIVIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CHICKASAW, IOWA
From 16-JUL-07 16:34:00 to 16-JUL-07 16:34:00 (CST-6)
Location: SAUDE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FLOYD, IOWA
From 16-JUL-07 16:36:00 to 16-JUL-07 16:36:00 (CST-6)
Location: POWERSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Public

Hail in HOWARD, IOWA
From 16-JUL-07 18:42:00 to 16-JUL-07 18:42:00 (CST-6)
Location: PROTIVIN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Public

Hail in HOWARD, IOWA
From 16-JUL-07 18:47:00 to 16-JUL-07 18:47:00 (CST-6)
Location: PROTIVIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CHICKASAW, IOWA
From 16-JUL-07 18:50:00 to 16-JUL-07 18:50:00 (CST-6)
Location: SAUDE
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 8.00K
Reported by: Trained Spotter

Hail in CHICKASAW, IOWA
From 16-JUL-07 18:53:00 to 16-JUL-07 18:53:00 (CST-6)
Location: SAUDE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WINNESHIEK, IOWA
From 16-JUL-07 18:58:00 to 16-JUL-07 18:58:00 (CST-6)
Location: JACKSON JCT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FAYETTE, IOWA
From 16-JUL-07 19:48:00 to 16-JUL-07 19:48:00 (CST-6)
Location: RANDALIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in FAYETTE, IOWA
From 16-JUL-07 19:50:00 to 16-JUL-07 19:50:00 (CST-6)
Location: RANDALIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Swing set blown down in yard.

Hail in HOWARD, IOWA
From 16-JUL-07 18:17:00 to 16-JUL-07 18:17:00 (CST-6)
Location: VERNON SPGS
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 8.00K
Reported by: Amateur Radio

Storm spotter turned around because hail got too large.

Hail in HOWARD, IOWA
From 16-JUL-07 18:39:00 to 16-JUL-07 18:39:00 (CST-6)
Location: PROTIVIN
Magnitude: 1.50 
Property damage: 10.00K
Crop damage: 15.00K
Reported by: Public