Nature bats last and the weather in March is hitting a grand slam for the outdoors. The latest storms to sweep across the Bay Area, Sierra Nevada and Northern California are a game changer for the snowpack, reservoir levels — and the imminent blossoming of spring across the parklands and greenbelt in the Bay Area. In a two-week span, the bottom of the ninth for winter, the storms arrived in time to transform the prospects for camping, hiking, boating, fishing and wilderness for the spring and summer recreation season.