A powerful series of storms is expected to hit San Diego County from Thursday until Tuesday, dropping 2’’ to 4’’ of precipitation along the coast in the rainiest period the region has experienced since late 2010. Valleys could get up to 5’’, and the slopes of some mountains could record 10’’, says the National Weather Service. Desert areas will get 1’’ to 3’’, and up to 1’ of snow could fall on the county’s tallest peaks. Forecasters say the storms will cycle shore from the western Pacific and could produce flash flooding across the county.