Thunderstorms climbing out of Darwin, naturally, and then JC's mysterious headwind generator produced 30kts on the nose for 350 miles of fruitless wind searches. Suddenly, the wind turned out of the north and started to help.
Finally, safely into Mount Isa, the centerpiece for the Mount Isa Mines, one of the most productive single mines in world history (lead, silver, copper, and zinc). Originally a gold town, it really boomed after the great finds of the 1960s and has fluctuated with the subsequent fall and rise of the mine's fortunes.