California Rainfall Deficit Update

With only a few exceptions, the recent rain across the state has just kept up with the previous March 1st normal-to-date figures. The picture is pretty discouraging if the amounts needed (i.e., deficits) to reach normal by the end of the rainfall season (i.e., June 30) are examined. For example, from the table below, the Northern Sierra 8-Station Index (8SI) needs another 29.25 inches to reach their end of season normal of 54.52 inches. The 8SI March 24 to June 30 normal is 9.42", so 310% of that amount would be needed.

The good news is that the state's major reservoirs are near, or in some cases above, historical averages to date. See

The other good news is that the prospect of a very early fire season has been somewhat mitigated in the short-term.

Jan Null, CCM
Certified Consulting Meteorologist
Golden Gate Weather Services
Twitter: @ggweather