In more on what is a very wet Friday 7 September 2018 in SYD (with earlier problems as lightning strikes were possible), JQ423, the 1700 hours OOL down to SYD was airborne at 1741 with arrival estimated at 1923, 53 late. This is a 'moderate' delay compared with that for many other flights tonight.
Showing this, JQ523 from SYD down to MEL, the 1600 hours with 220 seat A321 VH-VWU was pointing skywards at 1911, meaning anticipated arrival at 2028 hours, 173 late.
JQ3, the 1625 hours SYD up to HNL is following closely as B788 VH-VKG took off at 1914, about two and a half hours tardy.
JQ37 (1640 hours SYD up to DPS, VH-VKA) took off at roughly 2006 so arrival is likely about three hours late.