The following events were reported: Flash Flood, Flood, Hail, Thunderstorm Wind, Tornado. These occurred near station USW00014819, approximately 22.4055 km away, between 2008-08-04 18:45:00 and 2008-08-05 01:00:00. The events included records with hailstones measuring 54.05769230769231 inches. The flood was caused by Heavy Rain. Thankfully, no injuries or fatalities were reported. The events caused property damage valued at 860000.0 and crop damage of 0.0. Episode Narrative: A powerful line of thunderstorms moved across northern Illinois during the evening hours of August 4th. Widespread and significant wind damage was reported along with several brief tornadoes on the leading edge of this line of storms. Close to 550,000 customers lost power during these thunderstorms. In the City of Chicago, more than 4,400 trees suffered some amount of damage, 161 light poles were damaged and 252 power lines were blown down. A powerful line of thunderstorms moved across northern Illinois during the evening hours of August 4th. Event Narrative: Strong straight line winds fanned out across a one quarter to one half mile wide path through Bolingbrook. Damage began just south of Clow Airport. Fences were blown down and sporadic minor tree damage continued. In an older subdivision with larger more mature trees, there were numerous tree limbs blown down and a few trees snapped or uprooted. But the houses were more sheltered by the larger trees and there was little damage to homes in this area. The strong winds continued east of Veterans Parkway. Small limbs were blown down at Jane Adams School. From the school east southeast to Schmidt Road, a few homes had siding peeled back or soffits damaged. There was sporadic damage to small trees and loose objects such as trampolines. Portable basketball sets were blown over. Winds were likely 60 to 75 mph in this area. East of Schmidt Road, along Remington Road and Frontage Road, damage to tree limbs was very minor. A construction trailer on Frontage Road, east of Woodcreek Drive was destroyed. Winds were estimated to be 85 to 95 mph at this point. South of Interstate 55, a large metal hotel sign was broken and a wooden pole holding a tornado siren was snapped. There was damage to an air conditioning unit on the roof of an industrial building. There was minor damage to trees along Old Chicago Road, east of Route 53 to Joliet Road. Large trees were damaged on Joliet Road. East along Bluff Road from Joliet Road to near Interstate 355, only sporadic minor damage to tree limbs was found with winds around 50 to 60 mph. A softball backstop at the Remington Lakes Sports Complex was damaged extensively. Wind gusts were estimated to 60 mph. As many as 50 large tree limbs were blown down along with power lines in Oak Park. A couple entire trees were also blown down. Trees and power lines were blown down. A semi truck was blown over near Manhattan Road. Wind gusts were estimated to 70 mph near 167th Street and Cicero Avenue. Wind gusts were estimated to 60 mph near 147th Street and Cicero Avenue. A tree was blown down onto a house near Richards and David Roads. A wind gust was measured to 68 mph with small tree limbs blown down. A wind gust was measured to 65 mph. Ten to fifteen inch diameter trees were blown down. Five trees were blown down. Six trees, 18 to 24 inches in diameter, were snapped off near 147th and Cicero Avenue. A tornado developed about one half mile east of Plainfield Naperville Road and about one block south of Boughton Road. There was a narrow path of more intense damage in a subdivision where several homes had sections of roofing torn off, siding and soffits torn loose, trees snapped and limbs blown down. The most intense damage was on Sparrow Lane, Maroon Bell Lane and Silverado Street. The tornado was rated EF1 at this point. Here one house was likely a total loss due to structural damage to the roof, covered porch, garage and one wall. A garage was destroyed at another home. The tornado weakened to EF0 east of this area from Kings Road to Indian Chase Meadows. There was sporadic damage to trees and limbs and a few homes had damage to shingles, siding and soffits. A small section of roof was removed from a house just east of Indian Chase Meadows. At this point, the tornado appears to have dissipated, but strong straight line winds fanned out. A six inch diameter tree limb was blown down on Route 394, a half mile north of Glenwood Dyer Road. A wind gust to 65 mph was measured at Boughton and Weber Roads. A wind gust to 59 mph was measured at Midway Airport. A large tree was blown down onto a car, crushing the roof of the car. Hundreds of tree limbs were blown down across Homewood. Most of the damage occurred on the northeast side of Homewood, particularly along Ridge Road between Riegel Road and Halsted Street. Two Japanese elm trees were blown down onto a fence, just missing a house. Another tree was blown down on two vehicles. Tree limbs and power lines were blown down across parts of LaGrange. A car was destroyed by a falling tree on 74th Avenue. Two houses suffered minor damage from falling tree limbs. A microburst began near the railroad tracks just east of Southwest Highway about one quarter mile south of 135th Street. The microburst widened, causing a damage path one quarter mile wide and about one third mile long. The microburst blew down numerous trees in the area of Carolina Lane, 92nd Avenue, Elm Street, and 137th and 138th Streets. Trees fell on rooftops, shingles were blown off a shed, there was damage to eaves of homes and there was porch and eave damage due to falling trees and tree limbs. Power lines were also downed due to falling tree limbs. Street flooding was reported near Harlem and 171st Street. Trees, tree limbs and power lines were blown down in Berwyn. Some of the tree limbs fell onto cars. A tornado touched down along the south side of 135th Street, one block east of LaGrange Road. It moved southeast through the neighborhood along Howe Drive snapping off numerous tree tops, downing three or four large trees, blowing down a fence, sending a gazebo swirling 30 feet into the air before depositing it in a neighbor's yard and damaging a roof on an auto shop along Southwest Highway. A car was also damaged by a falling tree limb. At this point, the weakening tornado was wiped out by a microburst as it crossed the railroad trucks just east of Southwest Highway about a quarter mile south of 135th Street. Standing water at Harlem Avenue and 171st Street was reported to be three and a half feet deep. Part of the roof of the Manhattan Township Building was peeled back by strong winds. Rain fell through the openings, putting weight on the drywall ceilings, which eventually fell onto township equipment and the Manhattan Food Pantry located on the top level of the building. Much of the damage was caused by the rain. A large tree was blown down near Plainfield Naperville Road at 111st Street, blocking the road. Five to seven inches of standing water was reported near Caton Farm Road and Route 30.