The National Weather Service now believes at least three tornadoes landed across the Chicago area during a violent weather eruption on Saturday, with straight winds also causing damage in Rockford.
According to officials, one of the three EC-0 tornadoes landed in the suburb of Oak Brook, while the other two tornadoes both landed in different parts of Boone County.
The first tornado landed in Oak Brook near a Hilton hotel and Willow Crest Golf Club, according to officials. The twister, categorized as an EC-0 tornado on the improved Fujita scale, packed estimated peak wind speeds of 75 miles per hour and reached a maximum width of 60 yards.
The tornado was on the ground for about 1.9 miles, and while it was, it broke tree branches and had the roof of an outbuilding by the golf course collapse. It lay on the ground for three minutes before lifting.
Another EC-0 tornado was reported in Boone County near Timberlane. The tornado, which reached an estimated top wind speed of 80 miles per hour, was on the ground for about a minute at. 17.55 and traveled half a mile and reached a maximum width of 60 yards.
Several trees were uprooted and broken at the start of the tornado path, and several floating docks were thrown over Candlewick Lake, officials said.
A third tornado was reported about 12 minutes later in Capron. The extremely short tornado landed in an open field near the intersection of Coon Trail and Capron Roads, causing no known damage with unknown wind speed and width.
Officials also said that after an exhaustive investigation, using drone footage from the Rockford Fire Department and Doppler radar data from Chicago and Milwaukee, storm damage in Rockford was not caused by a tornado, but by gusts of wind blowing more than 70 miles per hour. .
The straight winds caused a roof collapse on a building near junction 9th and the Broadway streets of Rockford. The wind also caused further roof damage to other buildings and broke power poles and tree branches in the area.
All data are preliminary and subject to change.