 Here is information about a flash flood warning for the following county, Penobscot, Maine. The National Weather Service in Caribou has issued a flash flood warning for East Central Penobscot County and East Central Maine until 1100 a.m. At 8 o'clock a.m., Doppler radar and automated rain gauges indicated heavy rain falling across the warned area. Between 1.5 and 3 inches of rain have fallen. The expected rainfall rate is 0.75 to 1.25 inches in one hour.