It does make you wonder why the airlines that use SOU have not kicked up a fuss about the endless cancellations whenever there is the slightest bit of fog
Hell ... Just take the likes of BRS and LBA as examples:
If weather diversions were a problem then who the hell would fly to/from, or risk flying to/from, either BRS or LBA?
Commercial aviation is what is written on the label, it's a commercial business, and if any particular route, or routes, don't provide for a viable profit then the operators would surely pull the plug.
Clearly routes to/from SOU are holding their own and SOU is fortunate enough to have such an alternate as BOH close by, this isn't about spotters, it isn't about monthly statistics, it's a commercial business and, somewhat fortunately, for the owners of SOU it appears to be viable.