A deep area of low pressure tracking from eastern Nebraska into southern Minnesota triggered scattered strong to severe thunderstorms across the Illinois River Valley during the late evening of May 17th.  Some of the storms produced hail as large as half dollars and wind gusts of around 60mph.  Most of the activity remained along and north of a Canton to Secor line.

Hail in FULTON, ILLINOIS
From 17-MAY-17 21:15:00 to 17-MAY-17 21:20:00 (CST-6)
Location: CANTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in PEORIA, ILLINOIS
From 17-MAY-17 21:39:00 to 17-MAY-17 21:44:00 (CST-6)
Location: PEORIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in PEORIA, ILLINOIS
From 17-MAY-17 21:44:00 to 17-MAY-17 21:49:00 (CST-6)
Location: MOSSVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in PEORIA, ILLINOIS
From 17-MAY-17 21:45:00 to 17-MAY-17 21:50:00 (CST-6)
Location: PEORIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WOODFORD, ILLINOIS
From 17-MAY-17 21:45:00 to 17-MAY-17 21:50:00 (CST-6)
Location: SPRING BAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in STARK, ILLINOIS
From 17-MAY-17 21:00:00 to 17-MAY-17 21:05:00 (CST-6)
Location: LA FAYETTE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down onto Route 78 northeast of La Fayette.

Thunderstorm Wind in MARSHALL, ILLINOIS
From 17-MAY-17 21:28:00 to 17-MAY-17 21:33:00 (CST-6)
Location: CAMP GROVE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two large tree branches were blown down.

Hail in KNOX, ILLINOIS
From 17-MAY-17 20:05:00 to 17-MAY-17 20:10:00 (CST-6)
Location: HENDERSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PEORIA, ILLINOIS
From 17-MAY-17 21:38:00 to 17-MAY-17 21:43:00 (CST-6)
Location: SHERWOOD FOREST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in KNOX, ILLINOIS
From 17-MAY-17 20:18:00 to 17-MAY-17 20:23:00 (CST-6)
Location: ALTONA
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

A metal outbuilding was damaged.

Thunderstorm Wind in MARSHALL, ILLINOIS
From 17-MAY-17 21:28:00 to 17-MAY-17 21:33:00 (CST-6)
Location: CAMP GROVE
Magnitude: 52.00 EG
Property damage: 90.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large farm machine shed was destroyed and another out building was damaged, with the debris blown about 1/4 mile northeast.

Thunderstorm Wind in MARSHALL, ILLINOIS
From 17-MAY-17 21:45:00 to 17-MAY-17 21:50:00 (CST-6)
Location: HENRY
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 3-foot diameter tree was snapped and damage occurred to the metal door and roof of a barn.

Thunderstorm Wind in WOODFORD, ILLINOIS
From 17-MAY-17 21:55:00 to 17-MAY-17 22:00:00 (CST-6)
Location: SECOR
Magnitude: 52.00 EG
Property damage: 27.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down, including one that fell onto power lines.