WATER SUPPLY INDEX for February 1, 2020
Feb 10, 2020 at 9:35am
The Department of Water Resources has finished the February 1, 2020 Water Supply Index (WSI) and Bulletin 120 (B120) forecasts. These forecasts include observed conditions through the end of January. The forecasts are posted at:
The projected median April-July (AJ) runoff in the major Sierra river basins ranges from 52 percent for the Cosumnes River to 88 percent for the McCloud River. The statewide seasonal AJ median forecast is 9.92 MAF which puts it at 71 percent of the historic average. The projected median Water Year (WY) runoff in the major Sierra river basins ranges from 42 percent on the Cosumnes River to 72 percent for the Total Inflow to Shasta. The projected Statewide median WY runoff is 65 percent of the historic average. The WSI forecast is based on precipitation and flows observed through January 2018.
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