The second typhoon this year is about to be generated. What are the conditions for the formation of a typhoon?

Typhoon No.2 previously predicted by the Central Meteorological Observatory, named Parrot, will land in mid-June and depart from the coast of Guangdong. Then it is expected to land along the coast from Zhuhai to Zhenjiang.

Trends of Typhoon Parrots No.1 and No.2

According to the previous information, the arrival of Typhoon No.2 was urgent, because a tropical depression had formed in the eastern Philippines on June 1 1 day, and it had reached the western Luzon Island in the Philippines on June 12. The central wind force has reached level 7, and the wind speed is about15m per second. At 8 o'clock that night, there was a tropical storm, that is, a typhoon. The meteorological department expected to land on the coast of Guangdong at noon in the middle of the year, and then gradually weakened and eventually disappeared. In fact, the whole process lasts for a short time, about three days.

Second, we must prevent heavy rainfall.

In the process of forecasting at that time, there was a hint that there was likely to be strong rainfall in the surrounding areas, especially near the typhoon center, and the rainfall was likely to exceed 100 mm, and even reached 160mm in some areas of Guangdong, Guangxi and Hainan when the rainfall was the highest, so we must take precautions in places with heavy rainfall.

Third, how is the typhoon formed?

Many friends are curious about how typhoons are formed. In fact, the mechanism of typhoon formation is not very clear, but meteorologists have analyzed the most basic elements.

The first is the warm sea surface. As we all know, typhoons are formed on the sea surface, and they are relatively empty sea surfaces. They can only be formed when the water temperature reaches a certain level, about 26.5℃, so most typhoons appear in summer, not only when the temperature reaches the standard, but also when the sea depth is about 60 meters.

Secondly, many people may have heard of geostrophic force. In the northern hemisphere, typhoons rotate counterclockwise, almost without exception. This is the geostrophic force. When the earth rotates, the equator will rotate faster, and the movement of the north and south levels is slower at this time. So when the speed is relatively high, the airflow will drive some places with relatively low speed to move in that direction. The earth where we live rotates from west to east. When the speed is too fast, the equator will drive the airflow, and when it rotates counterclockwise from north to south, it will rotate clockwise. It is not that the northern hemisphere will not rotate counterclockwise, but that weak tropical cyclones can only form a small part, and the geostrophic bias force will drive tropical cyclones clockwise, so there is no way to form a typhoon, so it needs geostrophic bias force to form a typhoon. This is why there is no way to form a typhoon near the equator.

Only with the above factors, there will be a wide sea level, and at the same time, a weak tropical cyclone will form on the warm sea surface, and then a relatively low-pressure area will run at high speed, leading to the sea surface turning.