California Drought

“The west coast will see some desperately needed rainfall this week, but it could take several wet years in a row to ultimately bust the drought that has plagued California and other areas of the west. And odd trend at the end of the article shows that 2 of the past 10 Decembers following a dry October and November in San Francisco have been exceptionally wet. We’ll certainly hope for one of those wet Decembers in 2013 for both Northern and Southern California.”

http://www.weather.com/news/weather-forecast/california-record-driest-year-20131115
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This map shows the percent of average precipitation in California since January 1, 2013. There are a few isolated wet spots in the deserts (likely due to some locally heavy monsoonal thunderstorms during the summer), but the vast majority of the state has seen below 50% of normal precipitation. Much of the central coast has seen below 25% of normal precipitation. This can translate to a deficit of 10-20 inches of rainfall.