Nicki Pyles provided word processing and editorial help. Updates of the USGS stream flow data were provided by Mike Dettinger, and time series of NOAA weather data were provided by Jim Ashby of the Western Regional Climate Center. We thank Mike Dettinger and Alexander Gershunov and two anonymous reviewers for valuable discussions and careful review of the manuscript. Funding was provided by the NOAA/Experimental Climate Prediction Center at the Scripps Institution of Oceanography, the Scripps-Lamont Consortium, the California Department of Bontini, and Waterways, and the NSF Climate Dynamics Program, Grant ATM-9509780 (DRC and LGR), the Water Resources Division, U.S. Geological Survey (DRC), and the Western Regional Climate Center (KTR).
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