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As California enters the sixth year of its historic drought, something unusual is happening: It’s raining. And raining. Rainfall is expected across much of the Bay Area again Sunday, with another storm coming Halloween night. Marin, Sonoma and other North Bay counties should get the biggest soaking. Meteorologists stress that it’s only the very beginning of California’s rainy season, so there are no guarantees that a wet October will bring a wet November, December, January or February. So far, though, October has been surprisingly wet across the northern part of the state, raising the hopes of drought-weary Californians.

One small change in the world has led to mind-blowing effects for Northern California, nature and the outdoor prospects for winter and the next year. That small change was a shift in mid-October in the location of the jet stream, the conveyor belt of storms. The deluges that have followed stopped a Tahoe fire, saturated soils, put many reservoirs at 100 percent of average for the date, fed wetlands in time for arriving waterfowl and shorebirds, and put ski parks in line for a chance at a big season. One of the best indicator sites is the weather station at the Blue Canyon airport, at 5,284 feet near Nyack along Interstate 80.

Wealthy farmer Dino Cortopassi has a lot in common with Gov. Jerry Brown. Both are in their late 70s. Both are opinionated. Both are Democrats. And both have a lot riding on Proposition 53, which would force state leaders to get voters’ approval before undertaking massive state building projects needing $2 billion or more in revenue bonds. Cortopassi, a 79-year-old Central Valley farmer and food processor, is pouring his money into passing the ballot measure, which could upend two legacy projects for Brown: $15.7 billion to build giant water tunnels to carry Northern California water southward, and $64 billion for a high-speed rail system.