Storms — accompanied by booming thunder, lightning displays and powerful winds — swept through parts of Wisconsin, Illinois, northern Indiana and Michigan overnight Thursday, leaving scores of trees down and thousands of homes without power.

Several tornadoes touched down Thursday in central Wisconsin. None of the twisters have received ratings yet, said Timm Uhlmann, a National Weather Service meteorologist in Green Bay.

“We’re still gathering reports,” Uhlmann said. “We’re assessing some of the damage and still getting video and pictures. The damage that we have is fairly widespread. There was a lot of large hail. In Eau Claire was one report of softball-sized hail.”

No injuries have been reported.

Surveys also were underway Friday of damage in Michigan to determine if any tornadoes touched down there, said Steven Freitag, a meteorologist with the National Weather Service in White Lake Township, northwest of Detroit.

The storms were fueled by temperatures in the lower 80s that stretched from Illinois into Michigan and were activated by a cold front that pushed through, Freitag said.

By Friday evening, customers in Michigan were slowly seeing power return but more than 200,000 remained without it. An estimated 60,000 were without power in Indiana. Another 27,000 in total had no electricity in Illinois and Kentucky.

The threat of severe weather in Chicago delayed a Beyonce concert by about two hours Thursday at Soldier Field.