With ample moisture still in place, another round of storm activity developed in the western Sydney region and across other parts of NSW to the north. The Southern Tablelands struggled due to a dry air punch coming through reducing the available moisture locally. The first storms developed over the Wollemi National Park and moved towards Bilpin and Richmond. Unfortunately, this effectively cooled the atmosphere and with anvil clouds, there was little chance of recovery. On the same token, a boundary was laid out and moved towards the Southern Tablelands and Appin region. With the sea breeze boundary moving in, a cluster of cumulus developed along this boundary and finally a storm developed rapidly south of Appin. This system also back-built with large towers.
Further storms consequently developed south of this storm and back built westwards towards Moss Vale and Bundanoon area. It formed a line along this linear zone. Heavy rain and likely hailstones would have developed from these storms. Further storms developed near Muralan and then a squall line followed from the west.
