Skip to main content
Hong Kong Observatory Brand Hong Kong - Asia's world city
GovHK Traditional Chinese Simplified Chinese Search
Search Site Map Contact Us
red dot
Print Version
Print Version PDF Version

Backward Trajectory Map in June 2011

By using computer model analyses, the past 72-hour backward trajectory of the air mass reaching Hong Kong is estimated by the Observatory on a daily basis. The daily trajectories are compiled into the Monthly Backward Trajectory Map. The Monthly Map for June 2011 is now available on the following webpage:

In June 2011, most of the air masses reaching Hong Kong originated from the south, indicating that the territory was mainly under the influence of southerly airstreams.

Backward Trajectory of Air Mass reaching Hong Kong in June 2011


For Daily or Seasonal Backward Trajectory Maps, please visit the following webpages:

Daily Backward Trajectory Map

Seasonal Backward Trajectory Map


Last revision date: <21 Dec 2012>