A Pacific storm that’s expected to tap into moisture from the sub-tropics will hit San Diego County on Friday and Saturday and drop 1.5’’ to 3’’ of rain at the coast, says the National Weather Service. The winds could gust close to 50 mph in San Diego, and to nearly 40 mph in Oceanside. Usually, the region’s mountains and foothills receive the heaviest precipitation from such storms. But forecasters say the coast could record the heaviest precipitation during this system.