High based were the order of the day given the high temperatures and large dew point deficit in Sydney. Storms began to develop after 2pm with the first showing signs of severity near Richmond. Hail was reported from this cell by Nick Moir. From here, numerous cells began to develop across the mountains and further south. It seems that Sydney was the extent of the main embedded cells. More isolated cells were observed in the Wollemi and east of the Putty Road. The slow movement of the cells resulted in warnings for heavy rainfall and possible flash flooding. It was inevitable that the higher bases led to some localised downbursts reported from Penrith, Windsor and Schofields.
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