As a native, and mostly life long north bay area soul,
have been well aware that the weather from 1900-1950 had been the wetest in the past two thousand years. Stretching it to include more recent and a bit further back does not seem out of line.
For Napa, Sonoma, and Mendocino, it should mean no more vineyars, or expansions, or gold courses. They are terribly water thirsty. Except under dry farming conditions.
Replanting the Redwood Forest from Arcata down to Santa Barbara and up to 20 miles inland, where possible, would change things mightily. At its fullest that forest could bring in fog from upto a 1000 miles off the coast.