Sydney weather (southerly busters) can result in storm damage.
Melbourne (and Adelaide) weather can result in really hot, strong and drying winds that can create havoc on the greens.
Especially if those greens are exposed to the wind from the north.
The north wind is a rare wind through the year, but not a rare wind in summer when major events are generally scheduled in Australia.
The member play that is likely on such days would be low - most would stay inside. However, for a pro event, the north wind can really compromise an otherwise wonderful course and set-up. Royal Melbourne, Royal Adelaide. Moonah Links Open have all had 'issues' with extreme north winds and pro events, although most of these are from many,many years (decades) ago.