Playing around with https://nuclearsecrecy.com/nukemap/ https://nuclearsecrecy.com/nukemap/ a bit, it seems it would take a lot of very powerful nukes before an

Playing around with https://nuclearsecrecy.com/nukemap/ https://nuclearsecrecy.com/nukemap/ a bit, it seems it would take a lot of very powerful nukes before any nuclear fallout would reach the south of Australia. Even with a fictional maximum kilotons (max for nukemap) nuke dropped in Darwin (north Australia) with maximum wind force south wouldn't make the fallout reach the south.