A disturbance moving through the northwest flow aloft brought several rounds of thunderstorms through the day on August 8th. Thunderstorms developed across central Iowa and moved into Benton, Buchanan, Delaware, and Dubuque Counties. There were multiple reports of nonsupercell funnel clouds in Benton County during the afternoon. Several rounds of severe thunderstorms developed in the late morning and continued into the early afternoon affecting the counties to the north of Highway 34 bringing reports of funnel clouds, destructive winds, hail and heavy rains.  A final round of thunderstorms developed by mid afternoon in Linn County and built southward into Johnson County. Multiple reports of hail occurred in the Cedar Rapids area. The line of thunderstorms transitioned to a heavy rain event with multiple reports of rainfall in excess of 1 inch.

Hail in LINN, IOWA
From 08-AUG-11 14:04:00 to 08-AUG-11 14:08:00 (CST-6)
Location: HIAWATHA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter-sized hail lasted 3 to 4 minutes.

Hail in LINN, IOWA
From 08-AUG-11 14:11:00 to 08-AUG-11 14:11:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in LINN, IOWA
From 08-AUG-11 14:05:00 to 08-AUG-11 14:05:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter-sized hail fell near 29th Street and First Avenue NE.

Hail in LINN, IOWA
From 08-AUG-11 14:09:00 to 08-AUG-11 14:09:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in JOHNSON, IOWA
From 08-AUG-11 14:07:00 to 08-AUG-11 14:27:00 (CST-6)
Location: OAKDALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported 0.86 inches of rain in 20 minutes.

Heavy Rain in SCOTT, IOWA
From 08-AUG-11 15:38:00 to 08-AUG-11 15:38:00 (CST-6)
Location: CREDIT ISLAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported heavy rain from 345 to 420 CDT.

Heavy Rain in CLINTON, IOWA
From 08-AUG-11 16:01:00 to 08-AUG-11 16:01:00 (CST-6)
Location: CLINTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain fell from 3 pm to 5 pm CDT.

Heavy Rain in SCOTT, IOWA
From 08-AUG-11 15:00:00 to 08-AUG-11 15:30:00 (CST-6)
Location: DAVENPORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Heavy rain fell in 30 minutes.

Heavy Rain in LINN, IOWA
From 08-AUG-11 16:09:00 to 08-AUG-11 16:09:00 (CST-6)
Location: BERTRAM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain fell since 2 pm.

Hail in CLINTON, IOWA
From 08-AUG-11 12:55:00 to 08-AUG-11 12:55:00 (CST-6)
Location: BIG ROCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel to quarter sized hail fell.

Thunderstorm Wind in LINN, IOWA
From 08-AUG-11 14:10:00 to 08-AUG-11 14:10:00 (CST-6)
Location: HIAWATHA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A fence was blown down, and a 12-inch diameter tree was down.  Six-inch limbs were also down in the area.

Funnel Cloud in CEDAR, IOWA
From 08-AUG-11 12:28:00 to 08-AUG-11 12:28:00 (CST-6)
Location: LIME CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A funnel cloud was spotted about 5 miles west of Sunbury.

Thunderstorm Wind in CEDAR, IOWA
From 08-AUG-11 12:15:00 to 08-AUG-11 12:15:00 (CST-6)
Location: TIPTON
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A utility pole was broken in town.

Funnel Cloud in BENTON, IOWA
From 08-AUG-11 13:10:00 to 08-AUG-11 13:20:00 (CST-6)
Location: VAN HORNE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud was observed for 5 to 10 minutes, dissipating around 220 pm CDT (120 pm CST).

Funnel Cloud in SCOTT, IOWA
From 08-AUG-11 12:51:00 to 08-AUG-11 12:51:00 (CST-6)
Location: NEW LIBERTY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter watched the funnel cloud dissipate, but still observed strong rotation in storm cell.

Funnel Cloud in BENTON, IOWA
From 08-AUG-11 13:40:00 to 08-AUG-11 13:40:00 (CST-6)
Location: BLAIRSTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter located 3 miles southeast of Keystone observed a funnel cloud about 3 miles east of his location.

Hail in JACKSON, IOWA
From 08-AUG-11 11:31:00 to 08-AUG-11 11:31:00 (CST-6)
Location: HURSTVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter-sized hail fell at the Hurstville Interpretive Center.

Thunderstorm Wind in CLINTON, IOWA
From 08-AUG-11 12:55:00 to 08-AUG-11 12:55:00 (CST-6)
Location: BIG ROCK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four to 5 inch diameter branches were blown down.

Thunderstorm Wind in JONES, IOWA
From 08-AUG-11 11:00:00 to 08-AUG-11 11:00:00 (CST-6)
Location: TEMPLE HILL
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A maple tree was uprooted and a pine tree was snapped off.

Hail in CEDAR, IOWA
From 08-AUG-11 12:30:00 to 08-AUG-11 12:30:00 (CST-6)
Location: BENNETT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime to nickel sized hail fell.

Hail in CEDAR, IOWA
From 08-AUG-11 12:04:00 to 08-AUG-11 12:04:00 (CST-6)
Location: BUCHANAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pea to penny-sized hail was accompanied by wind gusts estimated at 45 to 50 mph.

Hail in CLINTON, IOWA
From 08-AUG-11 12:30:00 to 08-AUG-11 12:30:00 (CST-6)
Location: ANDOVER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Time is estimated based on radar.

Hail in LINN, IOWA
From 08-AUG-11 14:06:00 to 08-AUG-11 14:06:00 (CST-6)
Location: HIAWATHA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINN, IOWA
From 08-AUG-11 14:05:00 to 08-AUG-11 14:05:00 (CST-6)
Location: HIAWATHA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter-sized hail was accompanied by heavy rain.

Funnel Cloud in CEDAR, IOWA
From 08-AUG-11 12:38:00 to 08-AUG-11 12:38:00 (CST-6)
Location: SUNBURY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Funnel cloud was observed directly overhead near intersection of 280th street and Vermont Avenue just northwest of Sunbury. It was moving east.

Hail in SCOTT, IOWA
From 08-AUG-11 13:00:00 to 08-AUG-11 13:00:00 (CST-6)
Location: DIXON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public