Tropical Storm Son-Tinh (1809)
Maximum gust peak speeds and maximum hourly mean winds with associated wind directions recorded at various stations when the tropical cyclone warning signals for Son-Tinh were in force
(a) First passage [17 – 18 July]
| Station | Maximum Gust | Maximum Hourly Mean Wind | ||||||
| Direction | Speed (km/h) |
Date/Month | Time | Direction | Speed (km/h) |
Date/Month | Time | |
| Bluff Head (Stanley) | ESE | 76 | 18/7 | 00:15 | ESE | 49 | 17/7 | 23:00 |
| ESE | 49 | 18/7 | 01:00 | |||||
| Central Pier | ESE | 72 | 17/7 | 22:06 | ESE | 38 | 17/7 | 22:00 |
| ESE | 38 | 18/7 | 00:00 | |||||
| Cheung Chau | ESE | 87 | 17/7 | 22:12 | ESE | 63 | 17/7 | 23:00 |
| Cheung Chau Beach | E | 87 | 17/7 | 21:52 | E | 58 | 17/7 | 23:00 |
| E | 58 | 18/7 | 00:00 | |||||
| Green Island | ENE | 81 | 17/7 | 23:20 | ENE | 43 | 18/7 | 00:00 |
| Hong Kong International Airport | ESE | 68 | 17/7 | 19:42 | ESE | 36 | 17/7 | 23:00 |
| Kai Tak | ESE | 65 | 17/7 | 21:26 | ESE | 31 | 17/7 | 22:00 |
| King's Park | E | 58 | 17/7 | 23:22 | E | 30 | 18/7 | 00:00 |
| Lau Fau Shan | ESE | 49 | 17/7 | 22:44 | E | 20 | 18/7 | 04:00 |
| North Point | ENE | 58 | 18/7 | 08:07 | E | 31 | 18/7 | 09:00 |
| Peng Chau | E | 68 | 17/7 | 23:21 | E | 41 | 18/7 | 00:00 |
| Ping Chau | SE | 31 | 18/7 | 01:49 | ESE | 7 | 18/7 | 08:00 |
| Sai Kung | SE | 67 | 17/7 | 22:17 | SE | 27 | 17/7 | 23:00 |
| Sha Chau | ESE | 59 | 17/7 | 23:16 | ESE | 38 | 17/7 | 23:00 |
| Sha Lo Wan | SE | 87 | 17/7 | 22:31 | SE | 31 | 17/7 | 23:00 |
| Sha Tin | ENE | 49 | 18/7 | 00:08 | ESE | 13 | 17/7 | 23:00 |
| Shek Kong | ENE | 58 | 18/7 | 08:17 | E | 22 | 18/7 | 01:00 |
| Star Ferry (Kowloon) | ESE | 70 | 17/7 | 22:07 | E | 34 | 17/7 | 23:00 |
| Ta Kwu Ling | NE | 58 | 18/7 | 02:19 | E | 16 | 18/7 | 05:00 |
| Tai Mei Tuk | E | 94 | 18/7 | 02:08 | E | 47 | 17/7 | 22:00 |
| Tai Mo Shan | ESE | 122 | 17/7 | 23:37 | ESE | 90 | 18/7 | 00:00 |
| Tai Po Kau | ESE | 67 | 17/7 | 22:23 | ESE | 34 | 18/7 | 01:00 |
| Tap Mun East | E | 87 | 18/7 | 01:56 | E | 52 | 17/7 | 22:00 |
| E | 87 | 18/7 | 01:57 | |||||
| Tate's Cairn | ESE | 101 | 17/7 | 22:22 | ESE | 54 | 17/7 | 23:00 |
| Tseung Kwan O | ESE | 43 | 17/7 | 20:31 | ESE | 16 | 17/7 | 21:00 |
| Tsing Yi Shell Oil Depot | SE | 67 | 17/7 | 23:35 | ESE | 22 | 18/7 | 00:00 |
| Tuen Mun Government Offices | SSE | 59 | 18/7 | 03:26 | ESE | 16 | 17/7 | 21:00 |
| Waglan Island | ESE | 88 | 18/7 | 01:56 | E | 56 | 18/7 | 00:00 |
| Wetland Park | ESE | 36 | 18/7 | 04:18 | SE | 13 | 17/7 | 23:00 |
Ngong Ping, Wong Chuk Hang - data not available
(b) Second passage [23 – 24 July]
| Station | Maximum Gust | Maximum Hourly Mean Wind | ||||||
| Direction | Speed (km/h) |
Date/Month | Time | Direction | Speed (km/h) |
Date/Month | Time | |
| Bluff Head (Stanley) | SSE | 43 | 24/7 | 00:22 | SE | 31 | 23/7 | 16:00 |
| Central Pier | ESE | 43 | 24/7 | 09:35 | ESE | 22 | 24/7 | 09:00 |
| Cheung Chau | SE | 68 | 23/7 | 18:52 | ESE | 43 | 23/7 | 16:00 |
| Cheung Chau Beach | E | 52 | 23/7 | 15:44 | E | 27 | 23/7 | 16:00 |
| Green Island | S | 75 | 23/7 | 19:23 | ESE | 36 | 23/7 | 16:00 |
| Hong Kong International Airport | SE | 56 | 24/7 | 08:50 | SSE | 30 | 24/7 | 09:00 |
| Kai Tak | ESE | 34 | 23/7 | 18:10 | ESE | 20 | 23/7 | 16:00 |
| E | 34 | 23/7 | 18:16 | |||||
| SE | 34 | 24/7 | 09:15 | |||||
| King's Park | SSE | 41 | 24/7 | 09:05 | SSE | 19 | 24/7 | 09:00 |
| Lau Fau Shan | SSE | 51 | 23/7 | 19:37 | SE | 25 | 24/7 | 10:00 |
| North Point | E | 30 | 23/7 | 18:45 | E | 14 | 23/7 | 18:00 |
| Peng Chau | ESE | 47 | 23/7 | 15:44 | ESE | 25 | 23/7 | 16:00 |
| SSE | 47 | 24/7 | 03:52 | SSE | 25 | 24/7 | 05:00 | |
| Ping Chau | SSW | 36 | 23/7 | 16:20 | SSE | 7 | 23/7 | 17:00 |
| Sai Kung | S | 72 | 23/7 | 15:40 | SSE | 34 | 23/7 | 16:00 |
| Sha Chau | SSE | 52 | 24/7 | 01:08 | SSE | 34 | 24/7 | 06:00 |
| Sha Lo Wan | SE | 51 | 24/7 | 09:18 | S | 20 | 24/7 | 10:00 |
| SW | 51 | 24/7 | 10:10 | |||||
| Sha Tin | SSW | 31 | 23/7 | 15:41 | SSW | 14 | 23/7 | 16:00 |
| Shek Kong | SSE | 31 | 23/7 | 16:27 | SSE | 12 | 23/7 | 17:00 |
| Star Ferry (Kowloon) | ESE | 43 | 24/7 | 02:13 | ESE | 22 | 23/7 | 16:00 |
| Ta Kwu Ling | S | 31 | 23/7 | 16:02 | ESE | 9 | 24/7 | 10:00 |
| Tai Mei Tuk | SSE | 63 | 23/7 | 15:52 | SE | 23 | 23/7 | 16:00 |
| Tai Mo Shan | SE | 76 | 23/7 | 19:26 | SSE | 56 | 23/7 | 17:00 |
| Tai Po Kau | ESE | 31 | 24/7 | 10:35 | SE | 16 | 23/7 | 16:00 |
| Tap Mun East | SE | 68 | 23/7 | 16:01 | ESE | 40 | 23/7 | 16:00 |
| Tate's Cairn | S | 62 | 23/7 | 16:26 | S | 38 | 23/7 | 17:00 |
| Tseung Kwan O | E | 30 | 24/7 | 00:30 | S | 12 | 23/7 | 16:00 |
| Tsing Yi Shell Oil Depot | SSE | 51 | 23/7 | 19:26 | ESE | 25 | 23/7 | 16:00 |
| Tuen Mun Government Offices | SSE | 58 | 23/7 | 19:20 | SSE | 20 | 24/7 | 10:00 |
| Waglan Island | SE | 51 | 24/7 | 02:44 | SSE | 40 | 24/7 | 03:00 |
| Wetland Park | S | 40 | 23/7 | 19:39 | SSE | 16 | 24/7 | 10:00 |
Ngong Ping, Wong Chuk Hang - data not available