From the Department of Water Resources: Forecast Summary: A Water Year 2020 Water Supply Index (WSI) forecast for conditions as of December 1, 2019 is posted at http://cdec.water.ca.gov/reportapp/javareports?name=WSI. The WSI forecast is based on the precipitation and runoff (full natural flow) through November 2019 and can be summarized as follows: Sacramento River Unimpaired Runoff Water Year Forecast (50 percent exceedance) 13.6 (76 percent of average) Sacramento Valley Index (SVI) (50 percent exceedance) 7.3 (Below Normal) San Joaquin Valley Index (SJI) … Continue reading WATER SUPPLY INDEX for December 1, 2019