Paraparap small multicell showing vigorous new growth on the western flank - 1537AEDST looking southwest approximately 60kms. (Canon EOS500 / 300mm lens / Fuji 200ASA)

A study of the only still photograph shows the storm complex at approximately 1537 AEDST - it is distinctly a multicell. The anvil spreads towards the east with tops around 9 kilometres and attached rain area, the cloud base is high (~2.5km). A vigorous new development is apparent to the right of the glaciating region. This strong updraft pulse is capped by pileus. This pulse also slopes at an angle from the base source but note the hook shape and hole in the base (see sketch below). This is the location of developing rotation, and became the focus of the tornadic dust plume in the video sequence.

Figure 4b