3:20 p.m. update: The thunderstorm warning has been canceled.
The National Weather Service has issued a severe thunderstorm warning for parts of Washtenaw County, including the Ann Arbor and Ypsilanti areas.
The warning is in effect until 3:30 p.m. for Ann Arbor, Dixboro, Saline, Ypsilanti and Willis. Parts of Wayne County are included in the warning as well.
The storm could bring 60 mph wind gusts, forecasters said. Damage to roofs, siding and trees should be expected, the weather service said.
The weather service said at 2:38 p.m. a line of severe thunderstorms was located along a line extending from Livonia to Milan and moving northeast at 55 mph.
Storms had already caused power outages and downed trees in locations throughout Washtenaw County earlier Thursday and a tornado watch was in effect for the area until 6 p.m.