Fig. 9: Precipitation evolution of an outer tropical cyclone rainband (TCR) observed during its preformation to mature stage.

Low-level composite radar reflectivity (dBZ, color shading) associated with Typhoon Saola at (a) 1830, (b) 1930, (c) 2030 and (d) 2130 UTC on 31 July 2012. In each panel, the red arrows mark the location of the studied outer TCR. The rainband is also highlighted by reducing the transparency of the rest of the radar reflectivities. Gray range rings with respect to the tropical cyclone center are indicated every 100 km.