(Source: NASA - The National Aeronautics and Space Administration) California's accumulated precipitation "deficit" from 2012 to 2014 shown as a percent change from the 17-year average based on TRMM multi-satellite observations. Credits: NASA/Goddard Scientific Visualization Studio A new NASA study has concluded California accumulated a debt of about 20 inches of precipitation between 2012 and 2015 -- the average amount expected to fall in the state in a single year. The deficit was driven primarily by a lack of air currents moving inland from the Pacific Ocean that are rich in water vapor. In an average year, 20 to 50 percent of California's precipitation comes from relatively...
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