San Diego Union Tribune: Another Miracle March or even traditional April showers failed to materialize across much of the Sierra this spring, adding pressure on Californians to save more water or risk widespread rationing. Season-closing snowpack figures came in a dismal 67 percent of normal, driven down by record-low precipitation over the last two months, the state Department of Water Resources reported yesterday. Water districts are extra-cautious when broaching the unpopular subject of rationing, but …