If rainfall were a competition, a place that few of us can pronounce would be the winner in the Bay Area Weekend-Plus Precipitation Sweepstakes.
Mount Umunhum, a peak variously reported at 3,486 and 3,488 feet in the Santa Cruz Mountains south of San Jose, got 10.89 inches of rain between 6 a.m. Thursday and 6 a.m. Monday. It's pronounced UM-un-um, by the way. Though if you want to explore the matter a little more deeply, see Gudde's California Place Names.)
In fact, rain data compiled by the California-Nevada River Forecast Center show that only one location throughout the state got more for the past four wet, wet days than Mount Umunhum. That would be Bucks Lake, in the Feather River watershed in Plumas County, which the CNRFC says got 11.59 inches over 96 hours.
That deluge in the Feather River watershed unleashed torrents that dumped 65 billion gallons of water into Lake Oroville, the state's second-largest reservoir. Oroville storage grew by 200,000 acre-feet over the weekend, enough water for about 400,000 "average" California households for a year (or enough to submerge an acre of almonds, or a football field, to a depth of about 38 miles).
Storage in Shasta Lake, California's biggest reservoir, increased by 203,000 acre-feet in the four-day period.