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Report on Severe Typhoon Koinu (2314)
Report on Severe Typhoon Koinu (2314)
Figures
Figure 1a: Provisional track of Koinu (2314): 28 September – 9 October 2023
Figure 1b: Provisional track of Koinu (2314) near Hong Kong
Figure 2: Rainfall distribution on 4 – 9 October 2023
Figure 3a: Infra-red satellite imagery at around 8 p.m. on 2 October 2023
Figure 3b: Infra-red satellite imagery at around 2 a.m. on 7 October 2023
Figure 3c: Infra-red satellite imageries of tropical cyclones Mangkhut, Saola and Koinu
Figure 4a: Image of radar echoes captured at 6:00 p.m. on 8 October 2023
Figure 4b: Image of radar echoes captured at 9:48 p.m. on 8 October 2023
Figure 4c: Image of radar echoes captured at 5:00 a.m. on 9 October 2023
Figure 5a: 10-minute mean wind direction and speed recorded at various stations in Hong Kong at 7:00 p.m. on 8 October 2023
Figure 5b: 10-minute mean wind direction and speed recorded at various stations in Hong Kong at 8:30 p.m. on 8 October 2023
Figure 6: Traces of 10-minute mean wind speed recorded at Cheung Chau, Waglan Island and Ngong Ping on 7 – 9 October 2023
Tables
Table 1: Maximum gust peak speeds and maximum hourly mean winds with associated wind directions recorded at various stations when the tropical cyclone warning signals for Koinu were in force
Table 2: Periods during which sustained strong and gale force winds were attained at the eight reference anemometers in the tropical cyclone warning system when tropical cyclone warning signals for Koinu were in force
Table 3: Daily rainfall amounts recorded at the Hong Kong Observatory Headquarters and other stations during the passage of Koinu
Table 4: Times and heights of the maximum sea level and the maximum storm surge recorded at tide stations in Hong Kong during the passage of Koinu
