Why do three strong cold air come to Hainan one after another?

On the afternoon of 28th, yellow warning signals of cold wave appeared in Haikou, Chengmai, Danzhou, Lingao and other places, which meant putting on clothes taken off a few days ago on 29th, and the nasty rainy weather came again. Everyone should pay attention to keep warm, wear more clothes, avoid getting wet, and prevent colds and autumn epidemics.

According to the forecast of the meteorological department, from February 28th to 4th, it will be continuously supplemented by three strong cold air (March 28th1,February 2nd), and most parts of the island will maintain low temperature and rainy weather, with a small temperature difference between day and night. The lowest temperature in the process appears in the early morning of 1 day, and in the early morning of 3rd to 5th, 12 ~ 14℃ in the southern coastal area, 7 ~ 1 1℃ in other areas, and it can be reduced to 4 ~ 6℃ in the central mountainous area.

654381Weather forecast (dangerous weather) issued by Hainan Provincial Meteorological Observatory at 05: 00 on October 29th;

Sea gale forecast

Affected by strong cold air:

Day to 3 1 night on the 29th: northerly winds are 6-7 and gusts are 8-9. From the afternoon of the 29th, it weakened to level 6, with gusts of 7-8. The island is close to Gaomai, reaching Haikou, with a northerly wind of 6 and a gust of 7-8, which weakened to 5-6 and a gust of 7 from the afternoon of the 29th. From Wenchang and Qionghai on the island to Sanya, the northerly wind is 6 and the gust is 7-8. Typhoon Typhoon No.1, which hangs in the coastal port around the island, will not change. In the waters near Xisha and zhongsha islands, the northeast wind is 6-7, and the gust is 8. Near the Nansha Islands, the northeast wind is 5-6.