Gusting winds of up to 80 kilometres an hour whipped across The Lakes Golf Club all day, knocking over a TV tower on the 18th green and forcing the suspension of play for three hours.
Senior, 53, became the oldest man to win the title in the 108-year history of the event when he completed his final round of par 72 in fading light to finish four-under for the tournament.
Brendan Jones finished second after a 71, while fellow Australian Cameron Percy was third, a shot further back on two under, after carding a 73.
Britain's world number four Justin Rose dropped a shot at the last to finish with a 76 for a share of fourth. (Reporting by Nick Mulvenney, editing by Peter Rutherford)
- Sports & Recreation
- Brendan Jones