This summer is turning out to be drier than expected. Preliminary data for April–July show Lee Vining Creek runoff is about 1,000 acre-feet short of the 17,900 acre-feet (53% of average) forecast, Rush Creek runoff about 2,000 acre-feet short of the 23,400 acre-feet (49%) forecast, and Parker Creek runoff about 600 acre-feet short of the 3,400 acre-foot (62%) forecast. Only Walker Creek appears to be on target with its 1,300 acre-foot (42%) prediction—notably the lowest forecast of the four creeks.
http://www.monolake.org/today/2012/08/12/a-very-dry-summer-continues/