Bernard William Newman, Phenomenal Hailstorm with Thunderstorm… (1947)
“ Parramatta's maximum temperature applied directly to Rathmines pseudo-adiabatic diagram is barely sufficient to surmount the inversion. Instability, however, would have followed very easily with only a slight additional mechanical lift or even if the Rathmines inversion were not real. The thunderstorm, however, did not develop over Parramata, and did not approach within seven miles of Parramata. It may be that not only was the inversion at Rathmines real, but there was probably a much greater inversion over the Parramatta area but no inversion to southward. ”
