The next Pacific storm will spread rain and mountain snow from Washington to Northern California by the middle of the week. The winter months are typically the stormiest months of the year across the Northwest, and this season has proven no different. Since Jan. 4, Seattle has had only one day without measurable rainfall. A strong Pacific storm coming into the West will bring more soaking rain and heavy mountain snow from the Pacific Northwest through central California Tuesday through Wednesday night, according to AccuWeather Senior Meteorologist Jack Boston.