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he tornado started at 3:30 pm about 1.2 miles north of Poplar Grove in Boone county and ended at 3:48 pm about 3.2 miles north northeast of Harvard in McHenry county, Illinois. The first signs of damage were at Quail Trap road where trees were damaged and sections of roofing were removed from a shed. A large barn was destroyed and other buildings were severely damaged. Large trees were snapped or uprooted. The tornado reached its maximum intensity of EF3 at the northeast corner of Centerville road and Beaverton road. A two story farm house and garage were leveled and large trees were stripped of all branches. The tornado was about 100 yards wide through this area.