Thunderstorms developed along a cold front and swept across northeast Iowa for the second consecutive night. These storms brought additional heavy rains producing more flooding problems on July 23rd into the 24th. The winds were also strong enough with the storms to create some wind damage. Clayton, Fayette and Howard Counties were included in a Presidential Disaster Declaration.

Thunderstorm Wind in HOWARD, IOWA
From 24-JUL-10 01:26:00 to 24-JUL-10 01:26:00 (CST-6)
Location: CRESCO MUNI ARPT
Magnitude: 61.00 EG
Property damage: 70.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Storms blew the roof off a car dealership with debris blown several blocks. At a nearby restaurant, picnic tables were lifted, windows busted and trees blown down. Signs for area businesses were also destroyed. A wholesale greenhouse had most of the glass panels on the roof of one building destroyed where the winds may have been locally higher. Another business close to the greenhouse also had the roof destroyed.

Flood in FLOYD, IOWA
From 24-JUL-10 01:04:00 to 24-JUL-10 04:00:00 (CST-6)
Location: WALLER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

U.S. Highway 18 was under water approximately 1 mile east of the city of Charles City.

Flood in FAYETTE, IOWA
From 23-JUL-10 23:36:00 to 24-JUL-10 02:45:00 (CST-6)
Location: ARLINGTON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators reported gravel road shoulders washed out in many spots along State Highway 187. Also, several acres of farm fields were under water but there were no subsequent reports as to whether the crops were damaged.

Flood in CLAYTON, IOWA
From 24-JUL-10 00:00:00 to 24-JUL-10 10:00:00 (CST-6)
Location: STRAWBERRY PT
Flood cause: Heavy Rain
Property damage: 80.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several gravel roads have been washed out across the southern part of Clayton County. Also, in the vicinity of Garber, water was flooding some corn fields and County Road C7X had water over it. Some homes also sustained damage with some basement walls collapsing. A three day rainfall total of 12.23 inches was measured at 6 a.m. CST July 24th in Strawberry Point and 6.69 inches at Lock and Dam 10 in Guttenberg.

Thunderstorm Wind in HOWARD, IOWA
From 24-JUL-10 01:10:00 to 24-JUL-10 01:10:00 (CST-6)
Location: ELMA
Magnitude: 61.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Newspaper

Four steel grain bins, a barn, well house and two machine sheds were destroyed by thunderstorms winds.

Flood in FAYETTE, IOWA
From 23-JUL-10 22:20:00 to 24-JUL-10 01:30:00 (CST-6)
Location: ARLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Main street in the town of Arlington was reported to be impassable due to rising water.

Flood in FAYETTE, IOWA
From 23-JUL-10 22:37:00 to 24-JUL-10 01:45:00 (CST-6)
Location: OELWEIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators reported 5 to 6 inches of water over State Highways 3 and 150 in the city of Oelwein. Also, about 9 miles east of Oelwein, water covered State Highway 3 at the intersection with County Road W45.

Flood in FAYETTE, IOWA
From 23-JUL-10 23:00:00 to 24-JUL-10 10:00:00 (CST-6)
Location: FAIRBANK
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several gravel roads are washed out across the southern part of Fayette County. Several homes sustained damages as well, mainly to basements with a few basement walls pushed in by the water. A three day rainfall total of 12.18 inches was measured at 6 a.m. CST July 24th about three quarters of a mile northwest of Oelwein.

Thunderstorm Wind in HOWARD, IOWA
From 24-JUL-10 01:13:00 to 24-JUL-10 01:13:00 (CST-6)
Location: ELMA
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

The brother of a NWS employee reported 5 foot diameter trees snapped off and some roofs were damaged.

Thunderstorm Wind in FLOYD, IOWA
From 24-JUL-10 01:20:00 to 24-JUL-10 01:20:00 (CST-6)
Location: COLWELL
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A metal grain bin was destroyed by thunderstorm winds.

Thunderstorm Wind in FLOYD, IOWA
From 24-JUL-10 01:18:00 to 24-JUL-10 01:18:00 (CST-6)
Location: CHARLES CITY
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: County Official

Several trees were blown down in Charles City by estimated 50 to 60 mph winds.