san francisco bay area observed precipitation map. Links to interactive precipitation maps. the national weather service forecast for the greater san francisco bay area for saturday calls for rain showers and a strong westerly wind. the rest of the bay area will likely see 1 to 3 inches of rain, with higher totals likely at higher elevations. This round of storms will also be accompanied by. after the first two waves of this week’s atmospheric river storm, the wettest bay area locations had recorded about 5 inches of rain. The third wave — arriving.
