The grid operator\u2019s summer assessment predicts electricity supplies to be adequate overall, but reliability in Southern California is \u201cmarginally more challenging\u201d than last year. \tThe California Independent System Operator\u2019s 2013 summer assessment released May 6, assumes the continued outage of the 2,100 MW San Onofre Nuclear Generating Station. It also expects the two AES Huntington Beach units to be refitted with synchronous condensers to provide voltage support, allowing for increased power flows into the area. \tThe predicted summer peak this year is 47,413 MW, with available capacity of 51,068 MW. \tSince last June, 2,502 MW of new power has come online, with another 891 MW expected to be flowing by June. Of the new supply, 24 percent is from wind and solar projects, according to the grid operator. \tThe supply cushion in Northern California is predicted to be 7 percent at times of high summer demand. In Southern California, it\u2019s estimated to be 6 percent. \tWhen operating reserves drop below 6-7 percent, the grid operator issues a \u201cStage 1\u201d warning, increasing calls for conservation. The more serious Stage 3 alert\u2014with CAISO intervening in the market to avoid black outs\u2014is called when supplies drop below 3 percent of operating reserves. \tThe grid operator noted it expects to tap into customers participating in demand-response and conservation programs to curb their usage and seek reduction via \u201cFlex Alerts,\u201d particularly in San Diego and south Orange counties. \t\u201cCalifornians can do their part to help relieve the stress on the system by reducing their electricity use during the afternoon peak created by air conditioning,\u201d stated Steve Berberich, CAISO President and chief executive officer.