The following events were reported: Funnel Cloud, Thunderstorm Wind, Tornado. These occurred near station USW00014819, approximately 25.907 km away, between 2020-08-10 14:15:00 and 2020-08-10 15:10:00.The events resulted in 0 injuries and 1 fatalities. No significant property or crop damage was reported. Episode Narrative: During the late morning through the afternoon of Monday August 10th, a line of intense thunderstorms known as a derecho brought widespread severe wind damage across Iowa, northern Illinois and northern Indiana.||In north central and northeast Illinois alone, the severe winds of 60 to 100 mph downed or damaged tens of thousands of trees, as well as caused severe damage to homes, businesses, and infrastructure. There were 10 injuries reported in north central and northeast Illinois within the NWS Chicago/Romeoville County Warning Area (CWA). Local officials estimated that nearly one million customers lost power across northern Illinois at the height of the derecho and some people were without power for several days. Damage was estimated to be in the hundreds of millions of dollars in north central and northeast Illinois, with several billions of dollars in damages across the entire Corn Belt region including significant damage to crops and agriculture infrastructure. While much of the damage was due to straight line winds, there were also 14 tornadoes documented in north central and northeast Illinois.||The combination of high moisture, explosive instability and very strong atmospheric wind flow for mid-summer had developed quickly over the Corn Belt region on the morning of August 10th. This resulted in a progressive, well-organized complex of storms for hundreds of miles and at times traveling nearly 70 mph. After bringing extensive damage from extreme wind speeds in Iowa that morning, the damage transitioned across northern Illinois from widespread wind damage to narrow, brief and intense swaths associated with compact circulations within the thunderstorm line, some of which were associated with tornadoes. During the late morning through the afternoon of Monday August 10th, a line of intense thunderstorms known as a derecho brought widespread severe wind damage across Iowa, northern Illinois and northern Indiana.||In north central and northeast Illinois alone, the severe winds of 60 to 100 mph downed or damaged tens of thousands of trees, as well as caused severe damage to homes, businesses, and infrastructure. Event Narrative: Traffic signals and a large tree were damaged near Delaney and Cedar Roads. A tornado with peak winds of 105 mph touched down near Walsh Drive, just north of Route 71. A pergola was destroyed, siding was ripped off a house and parts of a fence and a tree were thrown over a road. Eyewitness accounts indicated the debris was lifted and twirled. The tornado continued moving east southeast producing damage to trees along Route 126. The most significant damage was found east of Schlapp Road along Wheeler Road where trees were mangled, a farm building was destroyed with debris deposited in a nearby field and a large grain bin was bent inward. Wood panels were thrown into the ground leaving scour marks in the grass. Six utility poles were snapped along Ridge Road and a 1000-1500 pound auger was moved about 50 feet. This is where the tornado likely reached peak intensity. The tornado continued southeast crossing into Will County just south of Renwick Road. Tree limbs and power lines were blown down in Flossmoor. A wind gust to 58 mph was measured at the National Weather Service office in Romeoville. Small tree limbs were observed flying past the window at the time of the peak gust. A tornado touched down in central Kendall County and moved southeast crossing into Will County just south of Renwick Road. Tree damage occurred along the path in Will County including a tree blown down near Caton Farm and Drauden Road. Minor roof damage occurred with some shingles blown off and some fences were blown down. One house lost half of the shingles on its roof with vents torn off, just east of Route 59. The tornado lifted near Caton Farm Road, just west of Interstate 55. Trees, tree limbs and power lines were blown down in Park Forest. Multiple vehicles were damaged by fallen trees. Several homes had roof or siding damage. Part of a brick wall collapsed off a house. Widespread tree damage occurred in forest preserve areas near Park Forest. A wind gust to 72 mph was measured at Midway Airport. A large and old brick and concrete structure that held a movie screen at an outdoor drive-in movie theater was destroyed with about 80 percent of the structure collapsed. Most of the debris fell in place and crushed a semi trailer that had been parked near the structure. Widespread wind damage was reported throughout Steger including trees blown down, trees on power lines and broken utility poles. Considerable tree damage was reported along Main Street, north of 75th Street. Large tree limbs were blown down in Clarendon Hills and Hinsdale. The worst of the damage was north of the railroad tracks in Clarendon Hills where roads were blocked. The worst damage in Hinsdale appeared to be in the northeast part of the village. Scattered tree limbs were blown down across Riverside. Widespread tree damage occurred in Crest Hill with the east side of town hit the hardest. Numerous large tree limbs were blown down along with some trees, blocking several roads. Powerlines were also blown down. A roof of an apartment building on Arbor Lane was partially blown off, displacing 10 families who lived there. A funnel cloud was observed from Caton Farm Road and Route 53. Scattered tree damage occurred in Joliet with broken tree limbs in several intersections along Jefferson Street. At least one car was damaged by a large tree in the Cathedral Area in Joliet, where power lines were blown down. Numerous other tree limbs were blown down. A tornado with peak winds of 100 mph touched just east of Harlem Avenue in Oak Forest then moved nearly due east along 151st Street producing tree damage and minor structural damage before lifting near the Interstate 57/294 interchange in Midlothian. Numerous trees were uprooted between Ridgeland Avenue and Cicero Avenue. The worst damage occurred between Cicero Avenue and Pulaski Road where several large trees and utility poles were snapped at their base. Tree damage continued east of Pulaski Road with fences blown down before the tornado lifted. Widespread wind damage occurred across much of northwest Joliet from Caton Farm Road and Interstate 55 southeast through Larkin Avenue and Black Road. Several hundred trees were damaged with hundreds of tree limbs blown down. Large tree limbs blocked some roads. A few pine trees had the top of the tree sheared off. Power lines were blown down in many areas. Hundreds of residential fences were damaged with many sections of fencing blown down. Some homes suffered minor roof damage with primarily some shingles blown off. Three utility poles were leaning near Suak Trail and Governor's Highway. A corridor of significant straight line wind damage occurred from Harvey east to Calumet City. Numerous trees were uprooted and snapped along this corridor. Some roofs were damaged by falling trees; other roofs suffered minor shingle damage from the strong winds. Some of the worst damage was in Harvey in an area between Sibley Boulevard to the north and 159th Street to the south. Trees were snapped and uprooted and extensive damage occurred to utility poles and power lines, resulting in some portions of the power grid needing to be completely rebuilt. Almost everyone in Harvey lost power. An estimated 300 to 350 trees were blown down in Harvey. Almost every road in Harvey was blocked by some amount of tree damage. Significant tree damage was reported in forest preserve areas including in the Shabonna Woods Forest Preserve. Damage was consistent with wind speeds up to 90 mph.||One day later, on August 11th, just after noon, a 59 year old man was walking in the 15000 block of Merrill Avenue in unincorporated Thornton Township near Calumet City. He stepped on a downed power line that was live and collapsed in a grassy area where he died. Numerous tree limbs were blown down in Oak Park. More than a dozen streets were blocked by the fallen tree limbs. Sporadic tree limbs 6 to 12 inches in diameter were blown down along McDonough Street. A private weather station measured a wind gust to 72 mph on Fir Street. Tree limbs and power lines were blown down in Lockport. Roofing material was peeled off a roof just north of Waveland Avenue and just west of Lake Shore Drive with debris blown across Lake Shore Drive. Trees, tree limbs and power lines were blown down in Frankfort. Some utility poles were damaged. A tornado with peak winds of 85 mph touched down near the Will Cook County line, just west of Shabbona Drive. This tornado produced mainly tree damage along its path. The worst of the damage was confined to a small area near Marquette and Somonauk Parks, although very little structural damage was noted in this area. The tornado lifted over Schubert's Woods Forest Preserve. Tree limbs and power lines were blown down in Romeoville. A tree was blown down blocking the exit from Lake Shore Drive to Wilson Drive. A wind gust to 84 mph was measured. Sporadic straight line wind damage occurred across South Chicago Heights and continued east to State Street. Tree limbs and power lines were blown down in Homer Glen. About 50 trees were knocked down or damaged along Logan Boulevard in the Logan Square neighborhood in Chicago. Tree limbs and power lines were also blown down. Wind gusts were estimated to 60 mph in Thornton. A narrow corridor of wind damage occurred along 23rd Street in North Riverside. One large tree fell between two houses near 10th Avenue causing some damage to aluminum siding. Another large tree near 2nd Avenue was completely uprooted, narrowly missing a house. A wind gust to 65 mph was measured in Burbank. Large trees and power lines were blown down across Plainfield. Wind gusts to 80 mph were measured at the Montrose Harbor Light. Tree damage was reported in Cicero. Tree damage occurred in Brookfield with the worst of the damage north of the railroad tracks. A corridor of widespread damage occurred along Grant Avenue where large tree limbs were blocking streets and sidewalks. A few larger tree limbs fell onto parked cars. A tree was split down the middle near Cleveland Avenue with part of the tree landing on the roof of a brick bungalow. A 45 foot tall Pine tree was blown down in Chicago Heights. Tree limbs and power lines were blown down in Westchester. At least one tree was struck by lightning. A tree was blown down blocking a road in Forest Park. A large tree was uprooted in Oak Lawn. Tree limbs and power lines were blown down in Orland Park. A fence was damaged in the Catalina subdivision. Extensive damage occurred to several Maple trees near the First Baptist Church along 179th Street in Tinley Park. Several shingles were blown off the roof of the church. Some of the shingles were found more than two blocks away. Widespread tree damage occurred across Chicago. At least 11,000 trees were blown down. Many more trees were damaged. Dozens of vehicles were damaged by falling trees and tree limbs, some vehicles were crushed. Numerous roads were blocked by the fallen trees. Hundreds of power lines were blown down, some started small fires. Wind gusts to 65 mph were measured with small tree limbs blown down. Large tree limbs and small trees were blown down in Bolingbrook. Significant wind damage occurred in New Lenox with many trees uprooted and many roads blocked by fallen trees. Hundreds of trees were uprooted or snapped along Cedar Road and Joliet Highway.