The following events were reported: Thunderstorm Wind. These occurred near station USW00014819, approximately 16.3258 km away, between 2010-06-18 14:50:00 and 2010-06-18 20:29:00.The events resulted in 5 injuries and 1 fatalities. The events caused property damage valued at 141000.0 and crop damage of 0.0. Episode Narrative: A line of severe thunderstorms moved from Iowa into northwest Illinois during the mid afternoon hours and then raced east across northern Illinois producing damaging winds as high as 90 mph. These thunderstorms produced widespread wind and tree damage across northern Illinois. More than half a million customers lost power during the storms. A line of severe thunderstorms moved from Iowa into northwest Illinois during the mid afternoon hours and then raced east across northern Illinois producing damaging winds as high as 90 mph. Event Narrative: Numerous trees limbs were blown down near 75th Street and Cass Avenue. Tree limbs were blown down near Southwest Highway and 53rd Court with estimated wind gusts to 75 mph. Widespread tree damage was reported near 90th Street and Ridgeland Avenue. A flag pole was snapped off. Large trees and large tree limbs were blown down with estimated wind gusts to 70 mph. Wind gusts were estimated to 70 mph near 75th Street and Lemont Road. Wind gusts were estimated to 60 mph. Thirty six trees were blown down or damaged. Wind gusts were measured to 70 mph near Route 394. A large tent was blown down on 15 people at Greek Fest. Three people were injured. Large tree limbs were blown down. A wind gust to 72 mph was measured near 87th Street and Pulaski Road. Six inch diameter tree limbs were blown down near 74th Avenue and 58th Place. Numerous large trees were blown down across roads and some on houses. A line of thunderstorms moved east across the City of Chicago producing winds in excess of 60 mph. The City of Chicago Department of Streets and Sanitation received thousdands of reports of trees and limbs blown down, and light poles blown down across the city. The worst of the storm of the damage occurred on the south side of the city. A man and a woman were injured by falling tree limbs on the south side of Chicago. A 21 year old woman was struck by a falling tree limb in the Beverly area. She was in the hospital for five weeks before succumbing to her injuries on July 23rd. Trees and tree limbs were blown down across west suburban Cook County. Some communities with tree damage included Elmwood Park, River Grove, Westchester, Oak Park, Norwood Park, Maywood, Bellwood, Hillside, Park Ridge, LaGrange, Brookfield, and Riverside. Trees and limbs fell on houses and cars. In Oak Park 60 trees were blown down. Maywood had 15 trees blown down. In LaGrange, part of a roof was blown off a house. Trees and power lines were blown down. A one foot diameter tree was blown down near 75th Street and Lyman Avenue. A line of thunderstorms moved east across the city of Chicago, producing wind gusts in excess of 60 mph. The department of Streets and Sanitation received thousands of reports of trees and limbs down, and light poles blown down, throughout the city. The worst of the storm hit the central and south parts of the city. In downtown Chicago, windows were blow out of the 25th, 28th and 29th floor of the Willis Tower (formerly Sears Tower). A building in Block 37 at State Street and Randolph had 35 windows damaged. Pieces of concrete were knocked off the Aon Center. A large ash tree was blown down onto a house on Marengo Avenue. The tree caused significant damage to the roof, a bedroom and the porch.