My mother just returned from a thing with my sister down at UC Irive. They flew WN OAK-SNA-OAK and instead of coming in over the city they came in over the water, departing later today on the same heading/runway. Instead of making a left turn while over Pleasenton they made a direct route passing over SJC and straight into OAK. My question is what is the reason for the unusual (might not be I'm not a frequent SNA flyer) runway selection and what runways are in use at OAK, SFO, & SJC? She tried to tell me that 28R/L wasn't being used but I would have to say that that's during crappy weather but the wx today was rather good and, in my opinion, did not permit for a change of arrival runways.
Thanks again for any help!