A spring storm brought several feet of snow to the Sierra Nevada and rain to parts of the San Francisco Bay Area, with more stormy weather expected this week. The seven-day snow total topped 3 feet (.9 meters) in some mountain areas as of Saturday, UC Berkeley’s Central Sierra Snow Lab reported. “We’re getting a bit of an abundant April!” the research station in Soda Springs said on Twitter . Mammoth Mountain in the eastern Sierra reported a foot (30 cm) of fresh snow. The resort has said it would remain open to skiing and snowboarding until Memorial Day. Lake Tahoe resorts also reported significant snowfall. Drivers heading up to the mountains were urged to use caution because of slippery conditions. Parts of Northern California including the Bay Area could see pockets of rain for much of the week thanks to an unsettled weather pattern […]