This is the old-fashioned pincer movement with yesterday's low coming down from the north west transferring its weather to another low forming in the north east. The result is a deluge over northern NSW and southern Qld. According to the chart some areas are 250+ mil since 9am with a large area over 100. That's above the maximum range predicted (about 60mm). And this is just the start - the next two days are expected to be worse.

The event started yesterday morning, raining on and off, then heavily all night and most of today. Guess we've had about 150 mil in that time.