Strong to severe thunderstorms moved across northern Illinois during the afternoon and evening hours of July 23rd producing strong winds.  Additional thunderstorms developed in the late evening of July 23rd and lasted in the early morning hours of July 24th producing very heavy rain and widespread flash flooding in many parts of the Chicago Metro Area.  Rainfall rates were as much as two to three inches per hour in some areas.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:13:00 to 23-JUL-10 16:13:00 (CST-6)
Location: PERU
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust to 70 mph was estimated along Route 251 about one half mile south of Interstate 80.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:15:00 to 23-JUL-10 16:15:00 (CST-6)
Location: UTICA AIRPARK ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Half of a large oak tree was blown down on East 9th Street.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:20:00 to 23-JUL-10 16:25:00 (CST-6)
Location: OTTAWA
Magnitude: 60.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees, tree limbs and power lines were blown down across Ottawa.  Two homes were damaged by falling tree limbs.  Route 23 was closed due power lines that fell across the road.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:25:00 to 23-JUL-10 16:25:00 (CST-6)
Location: SHERIDAN
Magnitude: 60.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Damage to multiple two foot diameter trees was reported in Sheridan.  Shingles were also blown off of a house.

Thunderstorm Wind in COOK, ILLINOIS
From 23-JUL-10 17:29:00 to 23-JUL-10 17:29:00 (CST-6)
Location: BEDFORD PARK
Magnitude: 60.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous ten inch diameter healthy tree limbs were blown down.  Numerous power lines were also blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 23-JUL-10 16:35:00 to 23-JUL-10 16:35:00 (CST-6)
Location: DOWNERS GROVE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown over.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 23-JUL-10 16:53:00 to 23-JUL-10 16:53:00 (CST-6)
Location: COAL CITY
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in WILL, ILLINOIS
From 23-JUL-10 17:05:00 to 23-JUL-10 17:05:00 (CST-6)
Location: JOLIET
Magnitude: 60.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees and power lines were blown down on the west side of Joliet.

Thunderstorm Wind in COOK, ILLINOIS
From 23-JUL-10 17:29:00 to 23-JUL-10 17:29:00 (CST-6)
Location: BEDFORD PARK
Magnitude: 60.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Shingles were blown off the roof of a house.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 23-JUL-10 16:45:00 to 23-JUL-10 16:57:00 (CST-6)
Location: MORRIS
Magnitude: 60.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large tree limbs and power lines were blown down in the Morris and Coal City areas.

Lightning in COOK, ILLINOIS
From 23-JUL-10 17:10:00 to 23-JUL-10 17:10:00 (CST-6)
Location: LA GRANGE PARK
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning apparently struck a pole at a bank on Burlington Avenue.  This pole then fell onto a chimney and then the chimney fell over, damaging a roof.  Several pieces of electronic equipment were no longer working after the strike, including credit card readers.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:00:00 to 23-JUL-10 16:00:00 (CST-6)
Location: MENDOTA
Magnitude: 60.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Newspaper

A few large trees were blown down, one along Stroble Avenue and a couple by the skate park at Lake Mendota.  Numerous tree limbs and power lines were also blown down.

Flood in WINNEBAGO, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: SOUTH BELOIT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

After heavy rain and flash flooding during the early morning hours of July 24th, flooding continued through the evening hours, especially along creeks and rivers.

Flash Flood in BOONE, ILLINOIS
From 24-JUL-10 02:00:00 to 24-JUL-10 06:13:00 (CST-6)
Location: IRENE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain fell during the early morning hours of July 24th and produced flooding across central and southern Boone County.  The intersection of Flora Church and Wheeler Roads was closed due to flooding.  Storm total rainfall of 4.40 inches was measured in Belvidere.

Flood in COOK, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: BRYN MAWR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

After heavy rain and flash flooding during the early morning hours of July 24th, flooding continued through the evening hours in several areas of north central Cook County.

Flood in OGLE, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: CRESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

After heavy rain and flash flooding during the early morning hours of July 24th, flooding continued through the evening hours across parts of Ogle County.  By late morning, significant flooding was reported along Killbuck Creek.

Flood in KANE, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: ELGIN ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

After heavy rain and some flash flooding during the early morning hours of July 24th, flooding continued into the evening across parts of north central Kane County.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:30:00 to 23-JUL-10 16:33:00 (CST-6)
Location: (MMO)MARSEILLES
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and limbs were blown down.

Flash Flood in DU PAGE, ILLINOIS
From 24-JUL-10 00:13:00 to 24-JUL-10 06:13:00 (CST-6)
Location: MUNGER
Flood cause: Heavy Rain
Property damage: 5.64M
Crop damage: 0.00K
Reported by: Newspaper

Very heavy rain fell across north central Dupage County during the early morning hours of July 24th producing widespread flooding and flash flooding.  Widespread street and basement flooding was reported.  North Avenue at Interstate 290 was flooded with a car stuck in the water.  Lake Ellyn overflowed its banks with six inches or more of water covering nearby streets.  The Village Links Golf Course was flooded with waist high water and a mail truck was submerged in the flood waters.  In Elmhurst, Interstate 290 was closed near York Street with two cars floating in water at least four feet deep; Route 83 was flooded and closed under the Union Pacific tracks with several cars floating in the water; Robert Plamer Drive was flooded and closed below the railroad tracks and all roads near Memorial Hospital were impassible.  In Lombard, the Main Street viaduct was flooded with stranded cars in the flood waters and 15 residents were evacuated by boat along Finley Road.  In Villa Park, significant flooding occurred near Wildwood and Monterey Avenues.  Salt Creek quickly rose out of its banks and flooded nearby areas.  In the Graue Mill Condominiums, 250 residents were evacuated after four feet of water surrounded the community when Salt Creek overflowed its banks.  Storm total rainfall amounts included 7.26 inches one mile northwest of Villa Park; 7.19 inches near Carol Stream; 7.08 inches one mile northwest of Glen Ellyn; 7.01 inches two miles west of Elk Grove Village; 6.98 inches in Oak Brook; 6.92 inches one mile northwest of Lombard; 6.52 inches near Wheaton; 5.57 inches two and a half miles north of West Chicago; 4.51 inches two miles southwest of Burr Ridge; 4.40 inches one mile southeast of Westmont and 3.45 inches in Lisle.

Flash Flood in COOK, ILLINOIS
From 24-JUL-10 01:00:00 to 24-JUL-10 06:13:00 (CST-6)
Location: BRYN MAWR
Flood cause: Heavy Rain
Property damage: 253.38M
Crop damage: 0.00K
Reported by: Newspaper

Very heavy rain fell across much of north central Cook County producing widespread flooding and flash flooding during the early morning hours of July 24th.  Hundreds of streets and thousands of basements were flooded.  Numerous homes were surrounded by flood waters with water damage on the first floor.  Several hundred vehicles were submerged or floating in flood waters, many were a total loss.  Areas that suffered some of the most widespread flooding and extensive damage included Westchester, Western Springs, La Grange, Oak Park, Bellwood, Riverside, Berwyn, Brookfield, Hillside and Forest Park.  In Westchester, 40 residents were evacuted by boat when their homes were completed surrounded by flood waters.  In Hillside, 56 residents of a convalescent home were evacuated onto a bus because of flood waters.  The bus then became stranded in flood waters and was pushed out by a front-end loader.  Twelve feet of water (which was overflow from the Chicago River) flooded the basement of a 17-story building in River City in Chicago.  No structural damage was reported but 80 to 90 cars in the basement were a total loss.  Portions of both Interstate 94 and Interstate 290 were closed due to flooding, including Interstate 290 just east of Des Plaines Avenue in Forest Park.  The Metropolitan Water Reclamation District of Greater Chicago estimated that over 60 billion gallons of water fell on Chicago and parts of Cook County, which quickly filled all 190 miles of the Deep Tunnel system.  Once this tunnel filled, floodgates were opened in Wilmette and on the Chicago River, releasing untreated stormwater into Lake Michigan.  Storm total rainfall amounts inclueded 7.89 inches one mile southwest of Oak Park; 6.43 inches at O'Hare Airport; 6.16 inches one mile northeast of Countryside; 5.84 inches about a half mile southwest of La Grange Park; 5.82 inches one mile west of Stickney; 5.58 inches near Streamwood; 5.47 inches two miles northwest of Melrose Park and 5.19 inches a half mile northwest of Des Plaines.

Flood in DE KALB, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: NEW LEBANON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

After heavy rain and flash flooding during the early morning hours of July 24th, flooding continued through the evening hours across parts of north central De Kalb County.

Flash Flood in WINNEBAGO, ILLINOIS
From 24-JUL-10 02:00:00 to 24-JUL-10 06:13:00 (CST-6)
Location: SOUTH BELOIT
Flood cause: Heavy Rain
Property damage: 632.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Very heavy rain fell across Winnebago County producing widespread flooding and flash flooding, including creek and river flooding.  Significant flooding was reported near Keith Creek in the Churchill Park area on the east side of Rockford.  Route 2 was flooded and impassible near South Beloit Road.

Lightning in WILL, ILLINOIS
From 23-JUL-10 17:20:00 to 23-JUL-10 17:20:00 (CST-6)
Location: JOLIET
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

A house on Essington Road was struck by lightning and set on fire.

Flood in BOONE, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: IRENE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

After heavy rain and flash flooding during the early morning hours of July 24th, flooding continued through the evening hours.

Heavy Rain in COOK, ILLINOIS
From 24-JUL-10 15:15:00 to 24-JUL-10 15:15:00 (CST-6)
Location: BURR OAK
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Newspaper

The roof of an auto body shop on Western Avenue collapsed during the afternoon of July 24th.  The exact cause of the collapse was not known but heavy rain that fell across the area during the early morning hours of July 24th was the likely cause of the collapse.  Six cars inside the shop were damaged.

Heavy Rain in COOK, ILLINOIS
From 24-JUL-10 02:00:00 to 24-JUL-10 02:00:00 (CST-6)
Location: SUMMIT
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

The roof of a storage facility near 66th Street and Narragansett partially collapsed during heavy rain which fell during the early morning hours of July 24th.

Flash Flood in OGLE, ILLINOIS
From 24-JUL-10 02:00:00 to 24-JUL-10 06:13:00 (CST-6)
Location: CRESTON
Flood cause: Heavy Rain
Property damage: 268.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain fell across Ogle County on July 23rd and July 24th.  The heaviest rains fell during the early morning hours of July 24th.  Forreston reported a storm total rainfall of 9.67 inches for both days.  Numerous roads and basements were flooded.  Several creeks and rivers overflowed their banks, causing additional flooding.  A church near Brookville sustained major water damage after the Elkhorn Creek overflowed its banks.

Lightning in WINNEBAGO, ILLINOIS
From 24-JUL-10 00:00:00 to 24-JUL-10 00:00:00 (CST-6)
Location: ROSCOE
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck an underground gas line on Wild Deer Trail and a second underground gas line on Huntsboro Lane.  Lightning also struck a home on Pin Oak causing a fire to start in the garage.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:20:00 to 23-JUL-10 16:25:00 (CST-6)
Location: OTTAWA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down.  A large tree limb fell on a pickup truck.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 23-JUL-10 16:32:00 to 23-JUL-10 16:32:00 (CST-6)
Location: MARSEILLES
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

The blade of a wind turbine was damaged.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 23-JUL-10 17:20:00 to 23-JUL-10 17:20:00 (CST-6)
Location: BRADLEY
Magnitude: 55.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and limbs were blown down.  A large tree limb fell on a car.

Flash Flood in DE KALB, ILLINOIS
From 24-JUL-10 03:00:00 to 24-JUL-10 06:13:00 (CST-6)
Location: NEW LEBANON
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Very heavy rain fell across north central De Kalb County during the early morning hours of July 24th producing widespread flooding and flash flooding.  Street and basement flooding was reported.  A trailer park in Sycamore was evacuated with almost 8 inches of rainfall reported in Sycamore.  Many roads were flooded and closed in Sycamore.  Route 72 was flooded in Kirkland.  Storm total rainfall of 5.46 inches was measured two miles southwest of Genoa.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 23-JUL-10 16:45:00 to 23-JUL-10 16:45:00 (CST-6)
Location: MORRIS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wind gusts were estimated between 60 and 70 mph.

Flood in DU PAGE, ILLINOIS
From 24-JUL-10 06:13:00 to 24-JUL-10 21:00:00 (CST-6)
Location: MUNGER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

After heavy rain fell during the early morning hours of July 24th, flooding continued across many areas of Dupage County, especially near creeks and rivers.  A 56 year old man drowned in a pond in Keeneyville after his paddle boat capsized.

Flash Flood in KANE, ILLINOIS
From 24-JUL-10 03:00:00 to 24-JUL-10 06:13:00 (CST-6)
Location: ELGIN ARPT
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Very heavy rain fell across north central Kane County during the early morning hours of July 24th.  Some street flooding was reported in St. Charles.  Basement flooding was reported in several areas in addition to flooding along creeks and rivers.  Storm total rainfall amounts included 6.74 inches in St. Charles; 6.47 inches in Elgin; 4.93 inches one mile north of Geneva and 3.20 inches in Elburn.