On Friday 21 July, SYD has again instituted single runway operations using the east-west runway.
QF161, the 0935 hours morning SYD up to WLG (B738 VH-XZH) as at 1121 hours was about to take off so it may well be more than an hour late arriving in the similarly often windy NZ capital.
QF455, the 0930 hours MEL-SYD took off basically on time at 0946 with VH-VYF but is arriving at 1125 hours, half an hour behind schedule. Feed in a lengthy wait to take off on its next flight and the delay arriving at the next timetabled airport becomes 45 minutes, and so it builds unless there's a buffer with turnaround times timetabled on the ground - the latter is possible during the offpeak, but unlikely from 1500 onwards as demand is heavier.
QF433 (1000 hours SYD-MEL, B738 VH-VYE) had yet to push back as at 1133 hours so even with the padded 95 minute blocks off to blocks on schedule, it'll be at least 90 minutes late into MEL's gate given the extra delays waiting for takeoff clearance.
UPDATE: By 1134 AEST, the north-south runways looked to be reopening.