| Date and time | Position of air mass | |
|---|---|---|
| 08:00HKT 26 Sep 2025 | 22.3 N | 114.2 E |
| 08:00HKT 25 Sep 2025 | 23.4 N | 119.0 E |
| 08:00HKT 24 Sep 2025 | 22.4 N | 120.5 E |
| 08:00HKT 23 Sep 2025 | 17.0 N | 126.8 E |
This webpage shows the 72-hour trajectory of the forecast movement of the air reaching Hong Kong at a height of 100 metres above ground level ending at 8 a.m. or 8 p.m. of the next 2 to 3 days.
The product may be useful for tracing the origin of air reaching Hong Kong.