Strong to severe thunderstorms developed across parts of far northern Illinois during the mid to late evening hours of July 27th and continued into the early morning hours of July 28th.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:11:00 to 27-JUL-11 20:11:00 (CST-6)
Location: WEST END
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wind gusts were estimated as high as 80 mph at the WREX Studios.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:15:00 to 27-JUL-11 20:15:00 (CST-6)
Location: RCKFRD COTTONWOOD AR
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was blown down blocking southbound Meridian Road just north of US 20.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:18:00 to 27-JUL-11 20:18:00 (CST-6)
Location: ROCKFORD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several large trees were blown down in Sinnissippi Park near North 2nd Street and Ethel Avenue.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:19:00 to 27-JUL-11 20:19:00 (CST-6)
Location: SAMUELSON CORNERS
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A boat of unknown size was tied to a dock along the Rock River near Arlington Street.  The boat was lifted out of the water and landed in a nearby tree.  Several windows were also reported blown out near Arlington Street.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:26:00 to 27-JUL-11 20:26:00 (CST-6)
Location: ROCKFORD
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 70 mph two miles north northeast of Rockford.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:28:00 to 27-JUL-11 20:28:00 (CST-6)
Location: SAMUELSON CORNERS
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 80 mph near North Alpine and Spring Creek Roads.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:36:00 to 27-JUL-11 20:36:00 (CST-6)
Location: PERRYVILLE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 75 mph near State Street and Perryville Road.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 27-JUL-11 23:25:00 to 27-JUL-11 23:25:00 (CST-6)
Location: CAROL STREAM
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lightning in MCHENRY, ILLINOIS
From 27-JUL-11 21:47:00 to 27-JUL-11 21:47:00 (CST-6)
Location: FOX RIVER GROVE
Property damage: 175.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning started a fire which destroyed the rood of a 2200 square foot home on Glenhurst Court.

Lightning in MCHENRY, ILLINOIS
From 27-JUL-11 22:30:00 to 27-JUL-11 22:30:00 (CST-6)
Location: WOODSTOCK
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning knocked ornamental stonework from the bell tower of the Woodstock Opera House.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:10:00 to 27-JUL-11 20:10:00 (CST-6)
Location: WINNEBAGO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees 10 to 14 inches in diameter were blown down.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:10:00 to 27-JUL-11 20:10:00 (CST-6)
Location: WEST END
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees were blown down blocking the westbound lane of West State Street near Weldon Road.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:25:00 to 27-JUL-11 20:25:00 (CST-6)
Location: ROCKFORD
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 70 mph near Court and John Streets.  A six inch diameter tree limb was blown down.

Flood in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:42:00 to 27-JUL-11 23:00:00 (CST-6)
Location: WEST END
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Standing water up to 6 inches deep was reported in streets.  Vehicles were stranded in deep standing water on Charles Street near 9th Street, East State Street near Rockford Avenue, and at East State Street and New Towne Drive.

Lightning in MCHENRY, ILLINOIS
From 27-JUL-11 21:47:00 to 27-JUL-11 21:47:00 (CST-6)
Location: FOX RIVER GROVE
Property damage: 175.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning started a fire which destroyed the roof of a 2200 square foot home on Glenhurst Court.

Lightning in KANE, ILLINOIS
From 27-JUL-11 23:00:00 to 27-JUL-11 23:00:00 (CST-6)
Location: SCRAPER MOECHERVILLE
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning sparked a fire at the Parks and Recreation administration building.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 27-JUL-11 23:08:00 to 27-JUL-11 23:10:00 (CST-6)
Location: CAROL STREAM
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous large trees were snapped and uprooted.  The hardest hit area was north of North Avenue, south of Aztec and between Kuhn Road and Gary Avenue.  The mayor declared Carol Stream a disaster.  Approximately 200 trees were damaged.

Thunderstorm Wind in COOK, ILLINOIS
From 28-JUL-11 12:50:00 to 28-JUL-11 12:50:00 (CST-6)
Location: BROOKFIELD
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

Three power poles were snapped along the Burlington Northern tracks from Hollywood to Rosemear Avenues.  Power lines were blown down in other parts of town.  A downed wire started a garage fire in the 3800 block of Cleveland Avenue.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 28-JUL-11 23:12:00 to 28-JUL-11 23:12:00 (CST-6)
Location: GRETNA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and tree limbs were blown down along Armitage Avenue.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 27-JUL-11 20:32:00 to 27-JUL-11 20:32:00 (CST-6)
Location: HARLEM
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A wind gust to 71 mph was measured near Interstate 90 and Riverside Boulevard.