Past Backward Trajectory
Please select period:
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 HYSPLIT model of NOAA. Anyone wishing to quote or further disseminate the data should read the "Disclaimer" of the NOAA Air Resources Laboratory web site for details.
- Incomplete analysis will be supplemented by forecast data.
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