Another round of convective storms fired along a stalled boundary and lasted overnight resulting in a major heavy rain and flooding event from 3 to over 8 inches of rain falling.  Some storms become severe with damaging winds over 60 mph and isolated large hail.

Thunderstorm Wind in BUCHANAN, IOWA
From 21-JUL-17 16:09:00 to 21-JUL-17 16:09:00 (CST-6)
Location: FAIRBANK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported tree branches were blown down.

Thunderstorm Wind in IOWA, IOWA
From 21-JUL-17 15:15:00 to 21-JUL-17 15:15:00 (CST-6)
Location: HOLBROOK
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Local law enforcement relayed a public report of a tree down on U Ave. and 270th street.

Tornado in JOHNSON, IOWA
From 21-JUL-17 16:44:00 to 21-JUL-17 16:45:00 (CST-6)
Location: SHARON CENTER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a brief tornado moving northeast. After touching down, the tornado then lifted and dissipated.

Flash Flood in CLINTON, IOWA
From 22-JUL-17 02:58:00 to 22-JUL-17 05:58:00 (CST-6)
Location: CLINTON MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported flooding in the eastern portion of Clinton County, including the city of Clinton.

Thunderstorm Wind in JOHNSON, IOWA
From 21-JUL-17 16:09:00 to 21-JUL-17 16:09:00 (CST-6)
Location: WILLIAMSTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported tree branches were down in the area.

Flash Flood in DELAWARE, IOWA
From 21-JUL-17 23:15:00 to 22-JUL-17 02:15:00 (CST-6)
Location: BACKBONE STATE PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported a local park was closed with water running over bridges in the park.

Flash Flood in DUBUQUE, IOWA
From 22-JUL-17 00:07:00 to 22-JUL-17 03:07:00 (CST-6)
Location: DURANGO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The county emergency manager reported evacuations in Durango due to rapidly rising water from the Little Maquoketa River.

Flash Flood in DUBUQUE, IOWA
From 22-JUL-17 00:10:00 to 22-JUL-17 03:10:00 (CST-6)
Location: DURANGO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The county emergency manager reported 3 feet of water over Paradise Valley Road.

Flash Flood in DUBUQUE, IOWA
From 22-JUL-17 00:15:00 to 22-JUL-17 03:15:00 (CST-6)
Location: GRAF
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The county emergency manager reported a road closed due to high water.

Flash Flood in JACKSON, IOWA
From 22-JUL-17 01:00:00 to 22-JUL-17 01:00:00 (CST-6)
Location: CANTON
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported a gravel road was washed out.

Flash Flood in CLINTON, IOWA
From 22-JUL-17 02:06:00 to 22-JUL-17 05:06:00 (CST-6)
Location: CLINTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported significant street flooding with one vehicle stranded and water coming out of manhole covers.

Flash Flood in DELAWARE, IOWA
From 22-JUL-17 01:21:00 to 22-JUL-17 04:21:00 (CST-6)
Location: BACKBONE STATE PARK
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported a road was washed out.

Thunderstorm Wind in LINN, IOWA
From 21-JUL-17 16:07:00 to 21-JUL-17 16:07:00 (CST-6)
Location: ELY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report was received of large tree limbs down over a car via KCRG Facebook page.

Hail in JOHNSON, IOWA
From 21-JUL-17 16:12:00 to 21-JUL-17 16:12:00 (CST-6)
Location: WILLIAMSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in JONES, IOWA
From 21-JUL-17 16:17:00 to 21-JUL-17 16:17:00 (CST-6)
Location: MARTELLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

A public report was received via KCRG Facebook page of a shed damaged and leaning over.

Hail in JOHNSON, IOWA
From 21-JUL-17 16:22:00 to 21-JUL-17 16:22:00 (CST-6)
Location: TIFFIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Pictures of hail the size of quarters received via the KCRG Facebook page.

Hail in JOHNSON, IOWA
From 21-JUL-17 16:29:00 to 21-JUL-17 16:29:00 (CST-6)
Location: UNIVERSITY HGTS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in CEDAR, IOWA
From 21-JUL-17 17:15:00 to 21-JUL-17 17:15:00 (CST-6)
Location: BENNETT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP observer estimated wind gusts up to 70 mph.

Thunderstorm Wind in MUSCATINE, IOWA
From 21-JUL-17 17:31:00 to 21-JUL-17 17:31:00 (CST-6)
Location: MUSCATINE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a few 2 to 4 inch diameter branches were down within the city of Muscatine.  Also, two 5 to 8 inch diameter tree limbs were down from soft wood trees.

Thunderstorm Wind in DUBUQUE, IOWA
From 21-JUL-17 22:30:00 to 21-JUL-17 22:30:00 (CST-6)
Location: CENTER GROVE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported trees down in the city of Dubuque, along with some power lines.

Flood in BUCHANAN, IOWA
From 22-JUL-17 08:15:00 to 23-JUL-17 11:15:00 (CST-6)
Location: FAIRBANK
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

The local COOP observer reported sandbagging at Costas and Johns Trucks. Many roads were impassable due to the 10 plus inches of rain which was reported to have fallen upstream.

Flash Flood in JOHNSON, IOWA
From 21-JUL-17 16:50:00 to 21-JUL-17 19:50:00 (CST-6)
Location: IOWA CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported several inches of water flowing over the road with manhole covers blown out.

Flash Flood in JOHNSON, IOWA
From 21-JUL-17 17:05:00 to 21-JUL-17 20:05:00 (CST-6)
Location: IOWA CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The county emergency manager reported a few cars stalled in several inches of ponding water on streets in town.