California’s northern Sierra Nevada mountain range, home to some of the state’s largest reservoirs, had the wettest first two months of the water year since 1984, the National Weather Service said Tuesday. Between October and November, the eight measuring stations along the northern range received an average of 18 inches of precipitation, or about 200% above average for the first two months of the state’s water year, said meteorologist Eric Kurth of the National Weather Service in Sacramento.