The following events were reported: Lightning, Thunderstorm Wind. These occurred near station USW00094846, approximately 26.5015 km away, between 2011-07-11 06:35:00 and 2011-07-11 07:15:00.Thankfully, no injuries or fatalities were reported. The events caused property damage valued at 239000.0 and crop damage of 0.0. Episode Narrative: On the morning of July 11th, a derecho swept across northern Illinois leaving a wide swath of damage from severe winds. Comed, a utility company providing service to much of northern and northeast Illinois, deployed more resources after this storm than at any time in its history. Over 1,100 crews from 14 states repaired or replaced 77.8 miles of wire, 600 poles and 1,000 transformers. On the morning of July 11th, a derecho swept across northern Illinois leaving a wide swath of damage from severe winds. Event Narrative: Tree branches up to 8 inches in diameter were blown down. A 12-inch diameter tree was blown down. Winds were estimated to 60 mph. A semi-truck was blown over on Interstate 94 near Route 176. Numerous large tree limbs were blown down onto streets. The roofs of two buildings on the 9600 block of Lois Drive were ripped off by strong winds. A 74-inch diameter tree known as the Bicentennial Ash was blown down in Gillson Park. A tree approximately two feet in diameter fell onto a moving vehicle causing heavy damage to the car. The incident occurred near the 4900 block of North Austin Avenue. No injuries were reported. A tree approximately two feet in diameter was snapped at the base and fell onto the roadway blocking traffic near the intersection of Princeton Avenue and Grove Street. In the Meadowbrook neighborhood, there were numerous houses with the siding ripped off. Multiple trees were uprooted or snapped at the base. One house on Waterford Lake had the chimney blown off. Winds to 65 mph were measured with an anemometer. A tree was blown down on Beith Road. Winds estimated to more than 70 mph lasted for two to three minutes causing 1-foot diameter trees and large branches to blow over as well as power outages. Large limbs fell through the windshield of a car at an intersection on Dole Avenue. Wind gusts were estimated to 60 mph causing intermittent power failures. Tree limbs of up to 4 inches in diameter were blown down. Some large trees were snapped, blocking roads. A few roofs were blown off of buildings in the Lincolnshire-Riverwoods district. A portion of a roof was peeled off by strong winds on Church Street. Large tree limbs were blown down. Numerous large trees and tree limbs were blown over. A traffic light on Naperville Road was blown down. A 12-inch tree fell on a house near the intersection of Windsory Drive and Palatine Road. An 18-inch tree was also uprooted nearby. Deerpath Road just west of Batavia was closed due to several power poles hanging over roadways. An power pole on North Kirk Road was also leaning over the roadway. Wind gusts were estimated between 60 and 70 mph. Fences were blown down and an 8-inch diameter tree was snapped near Hintz Road and Windsor Drive. At Arlington Park Race Track, 4 to 6 inch diameter branches were blown down. Numerous trees and power lines were also down across the area. There was a report of a window blown out of a house. Large branches fell onto a parked car in northwest Prospect Heights causing moderate damage including a shattered back window. A 15-inch diameter tree was uprooted by winds estimated to 70 mph. A 24-inch diameter tree was blown down at the intersection of Oakton Street and Wesley Avenue. Other trees were blown down in the area. Telephone lines were blown down along with large trees in Prairie View. A roof was blown off. Numerous tree branches 18 to 24 inches in diameter were blown down. Power lines were blown down. The road was blocked on 63rd Street between Fairview Avenue and Belmont Road. Downed power lines sparked a fire that spread to four cars. Two of the cars were totaled, with the interiors completely burned. Large tree branches were blown down. Trees two feet in diameter were snapped and utility poles were blown down near the intersection of Checker Road and Schaeffer Road. Wind gusts estimated to 65 mph blew down at least six large trees in Loyola Park near the lakefront. Diameters were estimated between 18 and 24 inches. Wind gusts were estimated to 60 mph. A large tree limb fell onto a roof on the 8600 block of Center Street damaging portions of the roof and awning. Trees eight inches in diameter were snapped near the intersection of Route 60 and Peterson Road. Tree branches 6 to 8 inches in diameter were blown down near the intersection of Miller Road and Route 12. Large branches were blown off trees. A lightning strike caused a fire on the 1100 block of Bards Avenue. Winds were estimated to 60 mph and caused damage to power transformers.