The BOM has certainly been adding in disclaimers, for the time i've been observing the weather they have tended to over-state.
I don't trust any of it though... having studied meteorology at uni I can say it is pretty much the least precise field of science i've been involved with and despite being one of the courses I did quite well in I have no idea about the weather

. There are too many variables to evaluate overnight and realistically forecasting has never received good funding. The BOM's predictions will certainly continue to increase in accuracy with the modelling available today. It is quite odd though that in Australia the systems seem quite large, minimal localised effects- we don't tend to care much about the weather and forecasting is poor. Compared to say NZ which appeared to have much more complex systems but many seemed more weather conscious also, don't know if this is exactly true more just the impression I got when I was there.