Water Supply Conditions San Diego/Statewide

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Update at the February Board of Directors meeting on the current water supply situation in San Diego and statewide.

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Water Supply Conditions San Diego/Statewide

  1. 1. Water Supply Conditions Water Planning Committee February 24, 2011
  2. 2. Statewide Snow Water Equivalents February 23, 2011 Region R i Inches I h % Average ANorthern Sierra 27 109Central Sierra 29 117Southern Sierra 29 138Statewide 29 121 Data provided by the California Cooperative Snow Surveys 2
  3. 3. Colorado River Conditions February 22, 2011Upper Colorado water year 2011precipitation to date 124% of averageCurrent Basin Snowpack 120% of averageProjected water year 2011unregulated inflow to Lake Powell 104% of normal no mal 6
  4. 4. Local Precipitation Local Precipitation July 1, 2010 – Feb 21, 2011 Station Actual inches % NormalLindbergh Field db h ld 9.63 139Ramona Airport p 19.04 184 7
  5. 5. Acre-feet Total Local Reservoir Storage* Total Local Reservoir Storage 500,000 400,000 2/22/11 300,000 300 000 200,000 , 2/22/2011: 363,900 AF 121% of Average 100,000 56,000 AF from 2/22/2010 0 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Average (2001-2010) WY 2010 WY 2011 *Includes 38 TAF of Water Authority carryover storage 8
  6. 6. ConclusionState Water Project Table A Precipitation Outlook March – May 2011Allocation is 60 percent forCY 2011Water supply conditions areat or above average forprecipitation, snowpack, andreservoir storageLa Niña conditions are still Precipitation Probabilitypresent but are likely to A= Above Average, B= Belowtransition to neutral Average, EC= Equal Chanceconditions in late Spring Source: National Weather Service 9
  7. 7. Total Dissolved Solids of  700 MWD D li dW MWD Delivered Water State Water Project State Water Project State Water Project Allocation 35% Allocation 40% Allocation 50% 650 2008 2009 2010 600 /L)Total Dissolved Solids (mg/ 550 MWD TDS Goal 500 450 400 350 300 11
  8. 8. Storage in Oroville and San Luis 6.0 Reservoirs in 2010 and 20114.040 1.92 MAF 1.99 MAF 4.61 MAF 109%2.0 1.37 MAF 2.69 MAF average 64% 2.62 MAF average 1.32 MAF0.0 February 21, 2010 February 21, 2011 Capacity San Luis Oroville 12

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