Keep the umbrella handy through Wednesday as a storm continues to soak Nevada County and the rest of California.About 6 feet of snow fell in the Sierra over the weekend, and meteorologists are still totaling rainfall numbers from the continuing storm, which was expected to pour 6 inches over western Nevada County."You would expect to get more precipitation this year (than last year), since we're in a La Nina cycle," said National Weather Service Meteorologist Edan Lindaman, based in Reno. The storm has triggered mostly minor flooding, mudslides, road closures and power failures across California. Power flickered off in Grass …