Here you go, the cool season (October through May, 2013-14) rainfall for Catalina, such as it was, updated from 1977-78:
I’ve added a historical note about Biosphere 2, gleaned from one of the tour guides up there. Of course, the full story, one of idealism thwarted by love, jealousy, murder, and ultimately, cannibalism, will likely never be told. Not everyone came out intact. Note, too, that MUCH drier winters than this past one occurred at and just after the turn of the century, which is pretty astounding.
The weather ahead
Nothing in sight, except some interesting high and maybe middle clouds from the deep Tropics in a few days.