Backward Trajectory Map in November 2015

November 2015 was the warmest November in Hong Kong since records began in 1884. The air mass trajectory map showed that there was hardly any cold air mass from the far north coming south to affect Hong Kong in November 2015. Most air masses had trajectories that took them across warm ocean surfaces before reaching Hong Kong.

The monthly backward trajectory map of air mass reaching Hong Kong can be found at the following webpage:
http://www.weather.gov.hk/en/wxinfo/trajectory/trajectoryMonthly.shtml

Backward trajectory map of air mass reaching Hong Kong in November 2015