More than 11,300 Central Maine Power Co. customers in central and northern Maine are without power tonight after powerful thundersorms swept through the region.

Somerset County was the hardest hit area with more than 6,700 outages reported. Penobscot County reported 2,800 outages. Other counties affected by the storms were Piscataquis, Kennebec and Lincoln.

The thunderstorms started moving through the region around 3:30 Monday afternoon with more than 12,000 customers without power at 5:50 p.m. But after the storms subsided and CMP crews started making repairs, the number of customers without electricity started to decrease by 7 p.m.

Stacie Hanes, a meteorologist with the National Weather Service in Gray, said one uncomfirmed report of a tornado was received from a resident of Somerset County. The weather service, which had not seen any photographs of the funnel, sometimes investigates if the report is considered legitimate.

Hanes said a low-pressure system pushing through central Maine triggered the storms. There was no word on when power might be restored.