updated: Severe thunderstorm watch set for Washtenaw County

Posted on Thu, May 3, 2012 : 6:53 p.m.

Thunderstorms were moving into Washtenaw County just before 9 p.m. Thursday, with the storm system about 13 miles west of Chelsea extending north past Hartland at 8:45 p.m.

The storm was moving southeast at 20 mph, according to weather forecasters.

The county had been under a severe thunderstorm watch since about 6 p.m., according to the National Weather Service. That watch was not going to be extended, according to a statement issued at 8:45 p.m.

The watch indicated that severe thunderstorms were possible in Washtenaw and multiple other counties in Michigan, according to forecasts.

Thursday's unofficial high temperature near Ann Arbor was 88, tying the record.

By Friday, the day should be mostly cloudy, with thunderstorms and rain showers and a high of 75.

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