Observation and Real-Time Simulation of a Tornado Event in Hong Kong on 29 August 2018

Figure 2

Various weather observations taken on 29 August 2018: (a) surface isobaric chart at 8 a.m. (local time) showing a trough of lower pressure over the coast of southern China; (b) concurrent upper-air ascent; (c) wind profiler data at a nearby urban site (time of tornado occurrence is marked with a blue line); and (d) time series of the vertical wind shear between the ground (taken to be the wind at Waglan Island) and the different heights (1 km, 3 km, and 6 km above sea level) as obtained from the wind data from the wind profiler at the urban area (the mean values are given as horizontal lines).

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(b)

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