Water content in California snowpack is only 17 percent of normal according to the California Department of Water Resources’ May 2 release (pdf). This means there will be a below average water supply this summer, which also impacts hydropower production for Western’s Sierra Nevada Region.
The water year, which began in October, started with some positive precipitation for the Central Valley Project. However California’s record-setting “dry” conditions in January, February and March have reduced the hydro conditions outlook for 2013.
See the most recent hydro conditions report for April 2013 (pdf).