KPCC: A first time study by the Department of the Interior predicts less snow in the California Sierras over the next century due to global warming, potentially hammering drinking water stores for the drier months. The Sacramento and San Joaquin Basins Climate Impact Assessment, released WHEN, predicts temperatures in Californias Central Valley will rise more than three degrees by the end of the century. That means some precipitation that would normally fall as snow and stick to the mountains will instead...