The National Weather Service says a tornado packing winds of 90 to 100 mph touched down in the Grayslake area Sunday night.
Citing preliminary information, the weather service classified the tornado as an EF1, the second-lowest category. The determination was made after survey crews inspected an area from Round Lake to Grayslake.
"Some of the damage is indeed damage that would be caused by a tornado," said Kevin Donofrio, a meteorologist with the weather service.
The tornado was spawned by the second of two strong bands of storms that crossed the Chicago area Sunday.
The storm that raked Lake County hit around 8 p.m. from the north ahead of a strong...