WASHTENAW COUNTY, MI - Nearly 20,000 people are without power in Washtenaw County. An afternoon storm and possible tornado knocked out power for roughly 19,900 people as of 5 p.m. Sept. 3, according to the DTE Energy Outage Map.

The weather service said two tornadoes struck in Detroit on Thursday, while other areas saw more than 3 inches of rain.

A tornado warning affecting counties throughout Southeast Michigan left some Ypsilanti residents without power and damaged electrical lines and trees.

Before the storm passed through the area, students and staff at schools around Washtenaw County were instructed to remain in designated areas until this afternoon's tornado warning had passed.

Storms moving through Michigan are dropping "torrential" rain, the weather service said. At least one tornado warning issued.

One tornado was confirmed by the Detroit National Weather Service in the Marysville area. Damage surveys underway in other areas.

A tornado warning has been issued for Lake and Geauga counties and northeastern Cuyahoga County on Thursday evening after weather spotters reported a funnel cloud near Timberlake. The warning continues until 6:45 p.