Normal runway configurations out there are...
SFO arriving 28L and 28R, departing 01R and 01L;
OAK arriving and departing 29;
SJC arriving and departing 30L.
Most airline jets can take a wet runway max tailwind of only 10 knots, thus when the winds come out of the S or SE in advance of a low pressure system approaching the coast, things swing around. OAK and SJC goe to 11 and 12R, respectively, but SFO could be on alot of different configuraions. The most common for landing is 19L, and departures off 10R and 10L, but I've also seen them use 28L and 28R for departures--it just depends on the wind direction and speed.
Weirdest configuration I ever saw at SFO was when they had winds from 010 at 20 gusting to 30. They had arrivals on the ILS to 28R/L with a circle-to-land on 01R/L, and departures were off 28L/R.
Anything off the stadard configuration at SFO equals big-time ATC delays, since the airport can handle the same volume of traffic...
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.