Past Backward Trajectory
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Past Backward Trajectory of Air Mass
Past Backward Trajectory of Air Mass
reaching Hong Kong at 8 a.m. 22 Sep 2025
| Date and time | Position of air mass | |
|---|---|---|
| 08:00HKT 22 Sep 2025 | 22.3 N | 114.2 E |
| 08:00HKT 21 Sep 2025 | 23.3 N | 117.6 E |
| 08:00HKT 20 Sep 2025 | 24.0 N | 118.9 E |
| 08:00HKT 19 Sep 2025 | 21.4 N | 121.6 E |
Points to note:
- The above table shows the past 72-hour backward trajectory of air mass reaching Hong Kong at a height of 100 metres above ground level ending at 8 a.m.
- Normally, this web page will be updated daily at around 5 p.m.
- Archive of trajectories is available for the past 30 days.
- The trajectory was prepared using the This link will open in a new windowHYSPLIT model of NOAA. Anyone wishing to quote or further disseminate the data should read the This link will open in a new window"Disclaimer" of the NOAA Air Resources Laboratory web site for details.
- Incomplete analysis will be supplemented by forecast data.
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