 The National Weather Service in Norman has issued a flash flood warning for Dewey County in northwestern Oklahoma until 9.15 a.m. Central Daylight Time. At 5.10 a.m. Central Daylight Time, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.