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 moved into northwest Illinois during the evening hours. These storms produced hail as large as golf balls, damaging winds of 60 to 70 mph, and two tornadoes. The tornadoes touched down near Fulton and Thomson Illinois. Both tornadoes produced EF-1 damage to mainly trees and farm outbuildings.

Hail in STEPHENSON, ILLINOIS
From 09-APR-15 15:50:00 to 09-APR-15 15:50:00 (CST-6)
Location: ROCK CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in STEPHENSON, ILLINOIS
From 09-APR-15 15:55:00 to 09-APR-15 15:55:00 (CST-6)
Location: DAVIS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HANCOCK, ILLINOIS
From 09-APR-15 16:15:00 to 09-APR-15 16:15:00 (CST-6)
Location: DENVER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HANCOCK, ILLINOIS
From 09-APR-15 16:15:00 to 09-APR-15 16:15:00 (CST-6)
Location: CARTHAGE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCDONOUGH, ILLINOIS
From 09-APR-15 16:30:00 to 09-APR-15 16:30:00 (CST-6)
Location: ARGYLE LAKE SP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCDONOUGH, ILLINOIS
From 09-APR-15 16:34:00 to 09-APR-15 16:34:00 (CST-6)
Location: ARGYLE LAKE SP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported hail ranging in size from half an inch to an inch.

Thunderstorm Wind in STEPHENSON, ILLINOIS
From 09-APR-15 17:45:00 to 09-APR-15 17:45:00 (CST-6)
Location: FREEPORT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 10 inch diameter tree limb was blown down in Freeport. The time of the event was estimated.

Thunderstorm Wind in BUREAU, ILLINOIS
From 09-APR-15 18:29:00 to 09-APR-15 18:29:00 (CST-6)
Location: MALDEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Emergency Manager in Bureau County reported that power lines were down.

Tornado in WHITESIDE, ILLINOIS
From 09-APR-15 17:02:00 to 09-APR-15 17:04:00 (CST-6)
Location: USTICK
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Storm Survey found that a tornado touched down 5 miles northeast of Fulton Illinois and lifted 8 miles east of Thomson Illinois. The tornado was on the ground for 1.08 miles in Whiteside Counties. The damage was primarily to trees and farm outbuildings.

Tornado in CARROLL, ILLINOIS
From 09-APR-15 17:04:00 to 09-APR-15 17:15:00 (CST-6)
Location: THOMSON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Storm Survey found that a tornado touched down 5 miles northeast of Fulton Illinois and lifted 8 miles east of Thomson Illinois. The tornado was on the ground for 7.22 miles in Carroll County caused damage primarily to trees and farm outbuildings.

Tornado in WHITESIDE, ILLINOIS
From 09-APR-15 16:54:00 to 09-APR-15 17:00:00 (CST-6)
Location: FULTON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS Storm Survey found that a tornado touched downed 1 mile southeast of the Clinton County Airport, tracked through the north side of Clinton, IA moved into Whiteside County.  It was on the ground for 3.91 miles in Whiteside County before it lifted about 5 miles northeast of Fulton.  The primary damage was to farm outbuildings, a storage shed and damage to trees.

Hail in PUTNAM, ILLINOIS
From 09-APR-15 18:51:00 to 09-APR-15 18:51:00 (CST-6)
Location: MAGNOLIA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter