Department of Water Resources releases May 1 Bulletin 120 and Water Supply Forecasts

The area surrounding the Chowchilla Bifurcation Structure along the San Joaquin River in Fresno, CA on October 15, 2013.

From the Department of Water Resources: The Department of Water Resources has finished the May 1, 2015 Water Supply Index (WSI) and Bulletin 120 (B120) forecasts. The forecasts include observed conditions through the end of April.  The forecasts are posted at: WSI: B120: Forecast Summary: The projected median April-July runoff in the major Sierra river basins ranges from […]

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Reservoir and water conditions for April 13, 2015

DWR Reservoirs Sliderbox

Here are the latest reservoir and water conditions: For even more reservoir and water conditions, visit the Notebook’s Water and Hydrology Internet Resources page. ———————————————- About Reservoir and Water Conditions: This post is a collection of graphic representations of current reservoir and hydrologic conditions drawn primarily from the Department of Water Resources website, as well as a few others. Reservoir […]

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Water supply index forecast for January 1, 2015

DWR?s Frank Gehrke of California?s Snow Surveys performs snow survey with California Legislative fellows Toni Lee and Karen Morrison.

From the Department of Water Resources: A Water Year 2015 Water Supply Index (WSI) forecast for conditions as of January 1, 2015 is posted at This WSI forecast is based on the precipitation and flows through December 2014 and can be summarized as follows: Sacramento River Unimpaired Runoff Water Year Forecast(50 percent exceedance) 17.1 MAF(94 percent of average) Sacramento […]

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California Weather Blog: Special update: The Extraordinary California Drought of 2013-2014: Character, Context, and the Role of Climate Change


From Daniel Swain at the California Weather Blog: “This special update is a little different from what I typically post on the California Weather Blog. In the paragraphs below, I discuss results from and context for a study that my colleagues and I recently published in a special issue of the Bulletin of the American Meteorological Society (Swain et al. […]

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