A powerful storm system lifted from Central Iowa into northern Illinois and southern Wisconsin during the day on April 9th. Strong to severe thunderstorms developed in eastern Iowa during the afternoon and exited into northwest Illinois during the evening hours. These storms produced hail larger than golf balls, damaging winds of 60 to 70 mph, and two tornadoes. The tornadoes touched down near Donahue and Clinton. Both tornadoes produced EF-1 damage to mainly trees and farm outbuildings.

Hail in CEDAR, IOWA
From 09-APR-15 16:12:00 to 09-APR-15 16:12:00 (CST-6)
Location: DURANT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

WQAD relayed reports of golf ball sized hail north and west of Durant.

Hail in SCOTT, IOWA
From 09-APR-15 16:09:00 to 09-APR-15 16:09:00 (CST-6)
Location: NEW LIBERTY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLINTON, IOWA
From 09-APR-15 16:28:00 to 09-APR-15 16:28:00 (CST-6)
Location: DEWITT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Mostly dime to nickel sized hail fell, but some hail stones were the size of quarters.

Hail in CLINTON, IOWA
From 09-APR-15 16:34:00 to 09-APR-15 16:34:00 (CST-6)
Location: DEWITT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CLINTON, IOWA
From 09-APR-15 16:54:00 to 09-APR-15 16:54:00 (CST-6)
Location: CLINTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SCOTT, IOWA
From 09-APR-15 16:30:00 to 09-APR-15 16:30:00 (CST-6)
Location: SCOTT COUNTY PARK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in SCOTT, IOWA
From 09-APR-15 16:15:00 to 09-APR-15 16:15:00 (CST-6)
Location: PARKVIEW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in DUBUQUE, IOWA
From 09-APR-15 16:50:00 to 09-APR-15 16:50:00 (CST-6)
Location: ASBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A lot of pea-sized hail covered the ground, along with some nickel and quarter sized hail.

Hail in DES MOINES, IOWA
From 09-APR-15 16:10:00 to 09-APR-15 16:10:00 (CST-6)
Location: MEDIAPOLIS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flash Flood in LINN, IOWA
From 09-APR-15 16:08:00 to 09-APR-15 17:08:00 (CST-6)
Location: CEDAR RAPIDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported flash flooding occurring at the intersection of 16th avenue southwest and 18th street. Water at the intersection was waist deep at the time of the report. Trained spotters in Cedar Rapids reported 1.03 inches of rain fell in 30 minutes which caused the flash flooding.

Tornado in SCOTT, IOWA
From 09-APR-15 16:04:00 to 09-APR-15 16:24:00 (CST-6)
Location: PLAINVIEW
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down 8 miles west of Maysville and continued on path for 22 miles and lifted 2 miles south of DeWitt. The tornado was on the ground for 16.22 miles in Scott County and then moved into Clinton County. It was rated as an EF-1 after an NWS Storm Survey. The tornado snapped numerous trees and there was damage to farm outbuildings.

Tornado in CLINTON, IOWA
From 09-APR-15 16:40:00 to 09-APR-15 16:54:00 (CST-6)
Location: CLINTON MUNI ARPT
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

NWS Storm Survey revealed damage primarily to trees and farm outbuildings and was rated as EF-1.  The tornado touched down 1 mile southeast of the Clinton Airport and was on the ground for 8.56 miles in Clinton County before it moved into Whiteside County.

Tornado in CLINTON, IOWA
From 09-APR-15 16:24:00 to 09-APR-15 16:30:00 (CST-6)
Location: GRAND MOUND
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down 8 miles west of Maysville and continued on path for 22 miles and lifted 2 miles south of DeWitt. The tornado began in Scott County, and was on the ground for another 5.8 miles after it moved into Clinton County. It was rated as an EF-1 after an NWS Storm Survey. The tornado snapped numerous trees and there was damage to farm outbuildings.

Hail in VAN BUREN, IOWA
From 09-APR-15 15:07:00 to 09-APR-15 15:07:00 (CST-6)
Location: LAKE SUGEMA CAMP GD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was accompanied by very heavy rain and wind gusts to 40 mph.

Hail in WASHINGTON, IOWA
From 09-APR-15 15:11:00 to 09-APR-15 15:13:00 (CST-6)
Location: WASHINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHINGTON, IOWA
From 09-APR-15 15:15:00 to 09-APR-15 15:15:00 (CST-6)
Location: RIVERSIDE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LINN, IOWA
From 09-APR-15 15:20:00 to 09-APR-15 15:20:00 (CST-6)
Location: CEDAR RAPIDS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DES MOINES, IOWA
From 09-APR-15 15:52:00 to 09-APR-15 15:55:00 (CST-6)
Location: DANVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LEE, IOWA
From 09-APR-15 15:45:00 to 09-APR-15 15:45:00 (CST-6)
Location: PRIMROSE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KEOKUK, IOWA
From 09-APR-15 14:40:00 to 09-APR-15 14:40:00 (CST-6)
Location: RICHLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were also down.

Hail in LINN, IOWA
From 09-APR-15 15:55:00 to 09-APR-15 15:55:00 (CST-6)
Location: SPRINGVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio