Unless the RAAF do it differently, we as ATC don't have a single thing to do with parking allocation. If we did, there would never be an empty bay. You may have problems getting the right stairs etc
A few people have mentioned the ATIS stuff, we as ATC compile the ATIS (and a bit of local knowledge means that occasionally we add a few degrees to the temp, that sort of thing) however we do derive most of the data from the BoM gear at the airfield. Clouds and vis we have a few tricks but we do not rely soley on the BoM gear.
AWIS which I think someone alluded to earlier is not supplied by ASA. I believe it is an aerodrome operator issue but I am not 100% certain of that.