Climate change prediction for Cali

This scenario makes a lot of sense to me. New Climate Research Reveals Growing Risk

If the world continues to burn greenhouse gases, California may have an increased risk of winter floods and summer water shortages, even within the same year. This scenario may be more severe in future El Niño years.

New research by Lawrence Livermore National Laboratory (LLNL) scientists shows that global warming is likely to change river flows in ways that may result in both increased flood risk and water shortages. The predictions assume atmospheric carbon dioxide concentration doubles from preindustrial levels. [...]

The research shows that this well-known scenario—in which global warming causes an increase in wintertime river flows and a reduction in spring and summer flows—is more robust than previously thought.

Then again, if the climate changes, can't they change the way they manage the reservoirs? They don't let them top off during the winter so they will have capacity to manage the spring melt. If the spring melt diminishes, they can't they just impound more water during the winter?