AgI-seeding should be done before the activation of most ice nuclei start, so as to enhance rainfall through increasing ice crystals content, and deleting super-cooled cloud water. 结果表明，该地区秋季对流云降水主要为冷云降水，冰晶是霰产生的主要来源，冰霰自动转化是霰产生的最主要方式，冰晶与霰的碰并又促进了霰的进一步增长，霰是云中过冷水消耗的主要因素。
The visible satellite imageries on the day gradually revealed a low-level circulation centre drifting to the northeast, leaving the cloud bands near southeastern Hainan. 当天的可见光卫星云图可见天鹅的低层环流中心向东北飘移，而对流云带则停留于海南西南部。
