I think that SWW tells you that the BoM rate there high resolution model Access C ahead of the global models
Having a closer look at the latest observations from the surface to upper levels of the troposphere, dew points in the Wimmera and South West have increased this morning, which should slowly creep eastward during today. Big plumes of moisture are now being detected on water vapour images in the mid levels before the trough in S.A, which is slowly moving eastward. Gravity wave clouds now appearing aloft in S.A signalling upper instability with the jet stream dipping down. Certainly has a look of localised downpours as the trough moves east
Model wise, the differences between the BoM access models 18z run and the global models 12z runs is moisture levels at 700 hPa later tonight and tomorrow morning. Access C and R are tapping into more moisture, elevating projected rainfall totals. Time will tell I suppose
Currently 19c with a 13c DP here.