Severe thunderstorms developed during the early evening hours of July 18th and moved across northern Illinois.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 18-JUL-07 18:30:00 to 18-JUL-07 18:30:00 (CST-6)
Location: WOODSTOCK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 18-JUL-07 19:20:00 to 18-JUL-07 19:20:00 (CST-6)
Location: WEST DUNDEE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 18-JUL-07 19:38:00 to 18-JUL-07 19:38:00 (CST-6)
Location: ARLINGTON HGTS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down blocking a road.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 18-JUL-07 19:40:00 to 18-JUL-07 19:40:00 (CST-6)
Location: BENSENVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A gust to 60 mph estimated at Route 83 and Thorndale.

Thunderstorm Wind in COOK, ILLINOIS
From 18-JUL-07 19:44:00 to 18-JUL-07 19:44:00 (CST-6)
Location: MT PROSPECT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down blocking a road.

Thunderstorm Wind in KENDALL, ILLINOIS
From 18-JUL-07 20:10:00 to 18-JUL-07 20:10:00 (CST-6)
Location: BOULDER HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Six inch diameter tree limbs blown down.

Thunderstorm Wind in LAKE, ILLINOIS
From 18-JUL-07 18:30:00 to 18-JUL-07 18:30:00 (CST-6)
Location: FOX LAKE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Several trees were blown down onto roads.

Thunderstorm Wind in LEE, ILLINOIS
From 18-JUL-07 20:23:00 to 18-JUL-07 20:23:00 (CST-6)
Location: AMBOY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down near Route 26 and Sterling Road.

Thunderstorm Wind in KENDALL, ILLINOIS
From 18-JUL-07 20:27:00 to 18-JUL-07 20:27:00 (CST-6)
Location: YORKVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees blown down near Route 47 and Kennedy.

Thunderstorm Wind in OGLE, ILLINOIS
From 18-JUL-07 20:30:00 to 18-JUL-07 20:30:00 (CST-6)
Location: KINGS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown onto Route 64 near Kings.

Thunderstorm Wind in OGLE, ILLINOIS
From 18-JUL-07 20:35:00 to 18-JUL-07 20:35:00 (CST-6)
Location: OREGON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down just south of Oregon on Route 2.

Thunderstorm Wind in LEE, ILLINOIS
From 18-JUL-07 20:45:00 to 18-JUL-07 20:45:00 (CST-6)
Location: WEST BROOKLYN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down at Route 251 and Cottage Hill.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 18-JUL-07 22:45:00 to 18-JUL-07 22:45:00 (CST-6)
Location: WAYNE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down on Shagbark Road.

Thunderstorm Wind in KANE, ILLINOIS
From 18-JUL-07 23:08:00 to 18-JUL-07 23:08:00 (CST-6)
Location: ST CHARLES
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down near Blackhawk and Joseph Roads.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 18-JUL-07 18:22:00 to 18-JUL-07 18:22:00 (CST-6)
Location: WOODSTOCK
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A gust to 67 mph was measured.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 18-JUL-07 18:34:00 to 18-JUL-07 18:34:00 (CST-6)
Location: WOODSTOCK
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A gust to 60 mph was measured near Route 47 and Lucus.

Thunderstorm Wind in WILL, ILLINOIS
From 18-JUL-07 20:25:00 to 18-JUL-07 20:25:00 (CST-6)
Location: ROMEOVILLE
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A gust to 61 mph was measured at the National Weather Service Office.

Thunderstorm Wind in WILL, ILLINOIS
From 18-JUL-07 20:30:00 to 18-JUL-07 20:30:00 (CST-6)
Location: ROMEOVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A gust to 60 mph was measured at 135th and Macon.

Flash Flood in WINNEBAGO, ILLINOIS
From 18-JUL-07 18:52:00 to 18-JUL-07 21:00:00 (CST-6)
Location: ROSCOE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

East Rock Road closed due to flooding.

Flash Flood in WINNEBAGO, ILLINOIS
From 18-JUL-07 18:58:00 to 18-JUL-07 21:00:00 (CST-6)
Location: SOUTH BELOIT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Blackhawk Road closed due to flooding.

Flash Flood in DU PAGE, ILLINOIS
From 18-JUL-07 20:31:00 to 18-JUL-07 23:00:00 (CST-6)
Location: NAPERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water up to 3 feet deep on Naper Blvd, one mile south of 75th.

Flood in OGLE, ILLINOIS
From 18-JUL-07 20:37:00 to 18-JUL-07 20:37:00 (CST-6)
Location: ROCHELLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water bumper deep on Capron Road.  Rochelle measured 2.75 inches of rain.

Heavy Rain in MCHENRY, ILLINOIS
From 18-JUL-07 19:50:00 to 18-JUL-07 21:00:00 (CST-6)
Location: CRYSTAL LAKE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm total rainfall 2.40 inches with minor ponding of water on roads.

Hail in COOK, ILLINOIS
From 18-JUL-07 19:29:00 to 18-JUL-07 19:31:00 (CST-6)
Location: SCHAUMBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel to quarter size hail reported.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 18-JUL-07 18:28:00 to 18-JUL-07 18:28:00 (CST-6)
Location: DURAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two trees blown down.

Heavy Rain in KANE, ILLINOIS
From 18-JUL-07 19:35:00 to 18-JUL-07 19:55:00 (CST-6)
Location: SOUTH ELGIN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One inch of rain in 20 minutes.

Heavy Rain in COOK, ILLINOIS
From 18-JUL-07 20:20:00 to 18-JUL-07 20:20:00 (CST-6)
Location: CHICAGO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two inches of rain measured in Wrigleyville.

Flood in LAKE, ILLINOIS
From 18-JUL-07 20:32:00 to 18-JUL-07 23:00:00 (CST-6)
Location: LAKE BLUFF
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Two feet of standing water at Route 41 and Route 176.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 18-JUL-07 20:21:00 to 18-JUL-07 20:21:00 (CST-6)
Location: WEST CHICAGO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One foot diameter tree blown down.

Flood in DU PAGE, ILLINOIS
From 18-JUL-07 20:00:00 to 18-JUL-07 22:00:00 (CST-6)
Location: WEST CHICAGO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Four to five inches of standing water Route 59 and Route 64.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 18-JUL-07 20:18:00 to 18-JUL-07 20:18:00 (CST-6)
Location: WINFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A 10 inch diameter tree limb was blown down.

Heavy Rain in WILL, ILLINOIS
From 19-JUL-07 00:00:00 to 19-JUL-07 00:00:00 (CST-6)
Location: PLAINFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Storm total rainfall of 4.03 inches measured in Plainfield near Route 126 and Route 30.  Storm total rainfall of 3.03 inches measured at the National Weather Service office.

Flood in WILL, ILLINOIS
From 18-JUL-07 21:23:00 to 18-JUL-07 23:30:00 (CST-6)
Location: JOLIET
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two and two and a half feet of water at Richards and Washington Streets.  Water one foot deep at Center Street, north of Interstate 80.

Flash Flood in KANE, ILLINOIS
From 18-JUL-07 20:45:00 to 18-JUL-07 23:00:00 (CST-6)
Location: AURORA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four to six inches of flowing water at Middle Avenue and Second Street.  Aurora measured 2.07 inches of rain.

Heavy Rain in COOK, ILLINOIS
From 18-JUL-07 20:11:00 to 18-JUL-07 20:41:00 (CST-6)
Location: PALOS HGTS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two inches of rain in 30 minutes near 135th and Ridgeland.

Flood in KENDALL, ILLINOIS
From 18-JUL-07 21:09:00 to 19-JUL-07 00:00:00 (CST-6)
Location: OSWEGO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four inches of flowing water at Simmom and Douglas Roads.  Simmon flooded for one half mile.  Eight inches of standing water at Dolores and Route 31.

Flood in COOK, ILLINOIS
From 18-JUL-07 20:55:00 to 18-JUL-07 23:00:00 (CST-6)
Location: OAK FOREST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four to five inches of standing water at 167th and Cicero.

Flash Flood in COOK, ILLINOIS
From 18-JUL-07 21:00:00 to 19-JUL-07 00:00:00 (CST-6)
Location: OAK FOREST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A viaduct was flooded west of Cicero Avenue on 159th Street.