EC looks very impressive this morning. Coldest airmass since August 2008 looking at the freezing levels. Only concern is the coldest air comes through between the best of the rain. Stays very cold for a long period from Friday arvo to Monday. Snow levels on Saturday morning are close to sea level (freezing level dips locally to about 500m). While inbetween they look to vary between about 500 and 800m.
Lots of activity in the sequence. Punchy fast moving front on Tuesday, warm frontal feature on Wednesday spreading rain from the north, strong front for Thursday with an intense low to our near south. Then a barrage of fronts Friday, late Saturday, Sunday and Monday. Rain totals will be substantial, winds a feature, and a significant storm surge on the coast. Of course, details will tweak, but currently looks like one of the more impressive system for a few years.
Btw looking back through our records. We got thunder snow here August last year (2018) and August 2014. Before that we had some in September 2003. Last year we had about 2cm accumulate. Last decent fall was August 2008 when we had about 10cm here so that the recent event to better
This one is too far out to be too confident on the finer details.