Began the day Sydney and headed south enroute to Braidwood but stopped short of there due to existing activity. A southerly outflow had created a boundary that fired activity north of Canberra and more around the Yass to Goulburn region. After heading towards Gunning from Lake George for the first cell of the day, we made our way to Marulan where a storm intensified. The storms remained either near the escarpment or other storms fired further west along the ranges. Finally, a cell was observed over the central Sydney region but as we approached it rapidly weakened undercut by the initial boundary that it developed upon. Our attention was diverted to an intensifying cell over Warragamba Dam region. This cell intensified rapidly and showed some impressive structure! And the contrast - sensational. Bolts descended from the base and pierced the mountain range several times. A consolidated and striated shelf cloud appeared and approached with possible localised rotation on the forward flank and within what appeared to be an inflow notch region. The storm then became quickly outflow dominant!