Typhoon "Siaba" has been generated or became the first typhoon in our country this year

Typhoon Siaba No. 3 this year has been generated on the central and eastern part of the South China Sea today (June 30) at 08. It is expected that "Siaba" will tend to the coast of the eastern part of Hainan to the west of Guangdong this weekend, or become the first typhoon to land in our country this year, which also means that the typhoon season will officially begin this year. So, is the first typhoon this year coming early or late? Why did the first typhoon prefer to land in South China? China Weather Network Deep Data from 1949 to 2021 tells you the answer.

"Siaba" may not be underestimated this weekend may not be underestimated

According to the Central Meteorological Observatory, the center of Typhoon No. 3 this year's Typhoon "Siaba" (Tropical Storm) is about 325 kilometers south of Sansha City (Xisha Yongxing Island), Hainan Province at 08.

It is expected that "Siaba" will move north at a speed of 10-15 kilometers per hour, and the intensity will increase slowly. Once the typhoon "Siaba" landed, it will become the first typhoon of our country this year, and the landing time will be about a week later than the average June 26th.

By searching for the historical typhoon, the path of Typhoon No. 7 in 2019 is similar to "Siaba". At that time, "Weipa" landed in Wenchang, Zhanjiang, and Guangxi Fangcheng Port in Hainan, Zhanjiang, and Guangxi. Affected by it, strong wind and rain appeared in South China.

The arrival of "Siaba" will also set off strong storms in South China. The Central Meteorological Observatory predicts that from July 1st to 4th, there will be middle to heavy rain in South China, Yunnan, and central and southern Guizhou, and there will be heavy rain to heavy rain in some areas. The cumulative rainfall is 40-80 mm. The central and southern parts can reach 120 to 180 mm, of which the northern part of Hainan, the coast of the central and western parts of Guangdong and the coastal areas of the south of Guangxi can reach 400 mm. The maximum hourly precipitation in the above -mentioned most are 50 ~ 70 mm, and the local area may be accompanied by strong convection weather such as thunderstorms.

In addition, the sea surface of the South China Sea, the Beibu Gulf, the Zhongsha Islands and the Xisha Islands, the Qiongzhou Strait, the coast of Guangdong, and the coast of Hainan Island will appear 6-7. The local waters can reach level 9-10, and the gusts are 11-12.

According to Li Liang, an analyst of China Weather Network, it is generally generated in the South China Sea, and the development intensity has reached tropical cyclones with a tropical storm and above. Essence

The strength and scale of the South China Sea tropical cyclone are generally smaller and weak than the Northwest Pacific, and it does not have typical typhoon characteristics on satellite cloud maps. Generally, the tropical cyclone in the South China Sea is generally generated in offshore. From generation to landing, it has a short effect of landing, short life history, and is easy to be controlled by high -altitude flow fields, cold air and other factors. Its development trend has great uncertainty. However, the impact of rain and disasters brought about by the "typhoon" of the South China Sea is often more prominent than wind disasters, and its power should not be underestimated.

Why did the Typhoon in the South China coastal at the beginning of the first typhoon favored South China?

Judging from the landing land of the first typhoon, it can "capture" the first typhoon in Ninghai, Zhejiang to Sanmen and Sanya in the north, and south, and Sanya, Hainan. However, statistics show that the landing sites of the first typhoon are the three provinces of Guangdong, Taiwan and Hainan, of which Guangdong is most popular.

According to the statistics of China Weather Network, in the past 73 years, Typhoon landed in Guangdong at the beginning of 33 years, landed in Taiwan in 17 years, and landed in Hainan in 13 years, accounting for 45%, 23%, and 17%of the total. In addition, Hong Kong, Fujian, Zhejiang, and Guangxi also landed.

Why do typhoons prefer to land on the coast of South China? Li Liang introduced that the travel of typhoons usually requires the guidance of the surrounding airflow, and the weather system that plays this guidance is mainly a subtropical high pressure. In June, the subtropical high pressure was often located on the northwest Pacific Ocean near 20 degrees north latitude, and sometimes stretched west to the South China Sea. This is easy to guide the typhoon to South China. Guangdong has a long coastline, so the chance of landing in Guangdong is even greater.

The first typhoon landing time concentrated in June and July accounted for more than 80 %

According to the big data of China Weather Network, the first typhoon in my country was concentrated in June to July. The proportion of typhoon landing in my country in the early two months was as high as 83%, of which, the proportion of landing in late June reached 14 times. It ranked second in the early days to 11 times.

Judging from historical data, the first typhoon landing in my country is very different. The most urgent temperament is Typhoon No. 1 "Raccoon" in 2008. On April 18th of that year, it landed in Wenchanglonglou Town, Wenchang, Wenchang, Hainan at a strong tropical storm level. It was the earliest typhoon in my country since 1949. It is also the only typhoon that landed in my country in April.

The first typhoon with the most "grinding" is "Nina", which landed on August 3, 1975. Although it is slow, it is very powerful. "Nina" first landed in Hualien, Taiwan with a super typhoon level, and then passed through the Taiwan Strait to land in Fujian again. Finally, it brought serious disasters to Taiwan, Fujian, Henan and other places, especially in Henan. Crime or economic losses.

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