During this period, there were three lows to the north that were on cyclone watch. The unusual double and treble “pencil line” activity from the Dampier/Port Hedland area had been even more active than usual since the Carnarvon flash. Here’s how the lines and flash looked on the Weather Chaser loop.
One of the lows went on to almost become a cyclone over the next few days, but not quite. This thread in the Weatherzone forum tells that story.