Strong to severe thunderstorms moved across many areas of northern Illinois from late morning through late afternoon on May 29th producing damaging winds, large hail and heavy rain, which caused flash flooding in some areas.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 29-MAY-11 10:45:00 to 29-MAY-11 10:45:00 (CST-6)
Location: (DPA)DUPAGE CO ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in GRUNDY, ILLINOIS
From 29-MAY-11 11:24:00 to 29-MAY-11 11:25:00 (CST-6)
Location: KINSMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail was reported along Gardner Road near Kinsman.

Flash Flood in LEE, ILLINOIS
From 29-MAY-11 10:45:00 to 29-MAY-11 16:00:00 (CST-6)
Location: AMBOY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

The Green River was reported out of its banks in the Amboy area.  Low areas including fields were flooded with 2 to 3 feet of standing water on the east and southeast side of Amboy.

Flash Flood in DU PAGE, ILLINOIS
From 29-MAY-11 12:45:00 to 29-MAY-11 16:00:00 (CST-6)
Location: KEENEYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Street flooding was reported at the intersection of Pine Avenue and Mensching Road.  Goose Lake Park was reported to be under water from flooding.

Strong Wind in WINNEBAGO, ILLINOIS
From 29-MAY-11 13:00:00 to 29-MAY-11 13:06:00 (CST-6)
Magnitude: 40.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong winds developed behind a line of thunderstorms across the Rockford area.  A baseball dugout and field fencing was damaged at a school on North Alpine Road.

Hail in WILL, ILLINOIS
From 29-MAY-11 11:59:00 to 29-MAY-11 11:59:00 (CST-6)
Location: NEW LENOX
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lightning in WILL, ILLINOIS
From 29-MAY-11 12:05:00 to 29-MAY-11 12:05:00 (CST-6)
Location: WOLFS
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a house on Scottsdale Circle which ignited the second floor roof.  The house was deemed uninhabitable.

Flash Flood in COOK, ILLINOIS
From 29-MAY-11 11:45:00 to 29-MAY-11 16:00:00 (CST-6)
Location: BAY COLONY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous streets were flooded in Park Ridge.  Burton and Fenton Roads were completely impassable due to flood waters.

Thunderstorm Wind in DE KALB, ILLINOIS
From 29-MAY-11 11:20:00 to 29-MAY-11 11:20:00 (CST-6)
Location: SYCAMORE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Half of a tree was blown down on North Fair Street.

Flash Flood in DU PAGE, ILLINOIS
From 29-MAY-11 12:52:00 to 29-MAY-11 16:00:00 (CST-6)
Location: CAROL STREAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The intersection of Kuhn Road and Birchbark Trail was closed due to water flowing onto the street from a retention pond.  Storm total rainfall of 1.87 inches was measured about a mile west of Carol Stream.

Flood in COOK, ILLINOIS
From 29-MAY-11 11:14:00 to 29-MAY-11 16:00:00 (CST-6)
Location: DUNHURST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous streets were flooded across north central Cook County.  Water up to 4 inches deep was reported on Interstate 94 between Dundee and Willow Roads near Northbrook.  Water up to car bumpers was reported on McCormick between Touhy and Howard near Skokie.  Water was reported covering Main Street in Melrose Park.  Water 6 inches deep was reported at North Avenue and Damen in Chicago.  Storm total rainfall amounts included 1.88 inches about a mile south of Evanston; 1.88 inches at Chicago O'Hare Airport; 1.75 inches in Morton Grove; 1.63 inches about a mile south of Winnetka and 1.12 inches two miles northwest of Melrose Park.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 29-MAY-11 12:05:00 to 29-MAY-11 12:15:00 (CST-6)
Location: WEST KANKAKEE
Magnitude: 65.00 EG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down on Cobb Street.  A 12 to 16 inch diameter tree was uprooted and fell onto a car.  The driver was not injured.  Three large trees were blown down on Main Street near the hospital, along with many large tree limbs.  Tree limbs and power lines were blown down across much of the city of Kankakee.  A large tree was uprooted and fell onto a house on Nelson Avenue causing severe damage to the first and second floors of the house.  Several large tree limbs were blown onto a house on South Seventh Avenue.

Flood in KANE, ILLINOIS
From 29-MAY-11 12:12:00 to 29-MAY-11 15:00:00 (CST-6)
Location: ELBURN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water up to 4 inches deep was reported along parts of Route 47 near Elburn.  Storm total rainfall of 3.13 inches was measured near Elburn.

Flood in OGLE, ILLINOIS
From 29-MAY-11 11:35:00 to 29-MAY-11 15:00:00 (CST-6)
Location: CRESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water was reported on roads, and ditches were full from heavy rain.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 29-MAY-11 11:10:00 to 29-MAY-11 11:10:00 (CST-6)
Location: EARLVILLE R AND R AR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down near the intersection of East 11th and North 4350th Roads.

Flash Flood in DE KALB, ILLINOIS
From 29-MAY-11 11:49:00 to 29-MAY-11 16:00:00 (CST-6)
Location: WATERMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water was reported flowing over multiple locations on Route 23, southeast of Waterman.

Flash Flood in LAKE, ILLINOIS
From 29-MAY-11 12:30:00 to 29-MAY-11 15:30:00 (CST-6)
Location: FOREST LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Deerpath Road was closed under the Route 41 overpass due to flash flooding.