Another unseasonably cold Pacific storm will blow ashore late Tuesday night, bringing showers to the coast, heavier rain to inland foothills and valleys, and about one inch of snow to the top of Mount Laguna, says the National Weather Service. The storm will produce sporadic precipitation at the coast until Thursday, producing roughly 0.25 of rain in San Diego. About twice as much will fall in the upper foothills. It’s also possible that some south-facing slopes will get one inch of rain