A weather phenomenon rare in Hong Kong showed up at the Hong Kong International Airport in the morning of 24 August 2005. A funnel cloud, accompanying thunderstorms associated with an approaching trough from the north, appeared over the western part of the south runway at around 9:25 a.m. The funnel cloud did not extend to the ground and disappeared in around five minutes. The photograph below was taken by Mr. S.T. Chow, the duty weather observer, from the Airport Meteorological Office at the Air Traffic Control Tower.