Severe thunderstorms moved across parts of northern Illinois during the evening of May 28th producing strong winds, heavy rain and flash flooding.  Additional thunderstorms moved across parts of northern Illinois during the early morning hours of May 29th.

Thunderstorm Wind in COOK, ILLINOIS
From 28-MAY-13 19:25:00 to 28-MAY-13 19:25:00 (CST-6)
Location: SAG BRIDGE
Magnitude: 55.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree fell onto power lines on Bell Road, which was closed between McCarthy Road and 131st Avenue.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 28-MAY-13 18:55:00 to 28-MAY-13 18:55:00 (CST-6)
Location: MARSEILLES
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A roof was blown off a machine building and large tree limbs were blown down.  Debris was wrapped around trees.

Hail in DU PAGE, ILLINOIS
From 28-MAY-13 19:09:00 to 28-MAY-13 19:10:00 (CST-6)
Location: NAPERVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in COOK, ILLINOIS
From 28-MAY-13 19:27:00 to 28-MAY-13 19:27:00 (CST-6)
Location: HOMETOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was blown down blocking a road.

Thunderstorm Wind in COOK, ILLINOIS
From 28-MAY-13 19:42:00 to 28-MAY-13 19:42:00 (CST-6)
Location: HOMETOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was blown down blocking Pulaski Road at 92nd Street.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 28-MAY-13 19:45:00 to 28-MAY-13 19:45:00 (CST-6)
Location: MANTENO
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FORD, ILLINOIS
From 29-MAY-13 00:26:00 to 29-MAY-13 00:26:00 (CST-6)
Location: PIPER CITY
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Eight to ten power poles were blown down.  A few sheds were blown down.  A big evergreen tree was blown down along with numerous large tree limbs.

Flood in WILL, ILLINOIS
From 28-MAY-13 19:55:00 to 28-MAY-13 23:00:00 (CST-6)
Location: BARBERS CORNERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

High standing water was reported on Interstate 355 at Boughton Road.

Flash Flood in COOK, ILLINOIS
From 28-MAY-13 20:50:00 to 29-MAY-13 01:00:00 (CST-6)
Location: HASTINGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Six to eight inches of water was reported at Main Street and 4th Avenue, which was closed.

Lightning in GRUNDY, ILLINOIS
From 28-MAY-13 19:15:00 to 28-MAY-13 19:15:00 (CST-6)
Location: MAZON
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A substation was severely damaged by a lightning strike.

Flash Flood in COOK, ILLINOIS
From 28-MAY-13 20:30:00 to 29-MAY-13 01:00:00 (CST-6)
Location: HILLSIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous viaducts were flooded across central and southern sections of Chicago with some impassable.  Vehicles were stalled in flood waters.  The Cicero Avenue entrance to Interstate 55 was flooded and closed.  The intersection of Ogden Avenue and LaGrange Road was flooded and closed.  Midway Airport measured 1.96 inches of rain in 1 hour and 17 minutes, from 641 pm CST to 758 pm CST.

Tornado in GRUNDY, ILLINOIS
From 28-MAY-13 19:18:00 to 28-MAY-13 19:20:00 (CST-6)
Location: GORMAN
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF0 tornado touched down northeast of Mazon near Reed Road, west of Higgins Road where a power pole was blown down.  The tornado moved northeast and blew down part of a tree on Higgins Road just south of Spring Road.  Three more power poles were blown down on Campbell Road.  Doors were blown off an outbuilding nearby before the tornado dissipated west of Coal City.

Thunderstorm Wind in WILL, ILLINOIS
From 29-MAY-13 05:05:00 to 29-MAY-13 05:05:00 (CST-6)
Location: ROMEOVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tree limbs, a few approximately 5 inches in diameter, were blown down.  Several parts of fences were also blown down, near the intersection of Naperville Drive and Honeytree Drive.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 28-MAY-13 19:20:00 to 28-MAY-13 19:20:00 (CST-6)
Location: COAL CITY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large trees were uprooted south of the Route 113 and Gorman Road intersection.