On another note, if you're playing Sunday games I'd be looking at making other plans kids.
http://www.bom.gov.au/nsw/forecasts/newcastle.shtml
90% for 8-25mm predicted by BOM this far out for Saturday and 95%!! 25-70mm

for Sunday?
Weekend write off...
Good for my water tanks though
EDIT: In case there was any doubt...check out Saturday 07:00 to Monday 04:00, especially from Sunday 04:00.
http://www.bom.gov.au/australia/char...er/index.shtml
I guess that's a bona fide East Coast Low.
70mm is a conservative guesstimation.