Unclear if the extreme reversals are the norm or something other than the norm but at least it's balance to an extent.
This happened in North Texas as well... long term drought almost totally reversed in spring of 2015. Reservoirs went from way down to filled up. And by and large the drought has not returned there in any serious fashion thereafter. Hopefully the same can be said about Cali in the years to come, though we wouldn't mind them sharing the wealth sometimes.