How is the typhoon track predicted?

Typhoon path refers to the path that the typhoon runs after it is formed, which can be roughly divided into three categories: westward moving type, landing type and turning type. Because typhoon is a kind of fluid, its path is influenced by many factors, and its movement mostly occurs at sea, so it is difficult to obtain data, so it is not easy to predict accurately. At present, by using early warning radar and marine resources satellite, we can detect the origin and path of typhoon, as well as the typhoon level and path occurrence time.

There are many factors that affect the movement of typhoon path, which are mainly divided into two categories:

First, the internal dynamic factors are mainly caused by the geostrophic bias accompanied by the rotation of the typhoon itself, the convergence and upward movement of the airflow.

Second, external force, the external force of typhoon mainly includes pressure gradient force, geostrophic deflection force and friction of environment (average airflow).

At present, early warning radar and marine resources satellite can be used to detect typhoon paths, including typhoon origin and path, typhoon level, path appearance time and so on. The factors that affect the typhoon path movement are internal dynamic factors, which are mainly caused by the geostrophic bias related to the typhoon's own rotation, airflow convergence and upward movement. There are also external forces. The external forces of typhoon mainly include environmental pressure gradient force, geostrophic deflection force and friction force.

Typhoon path is one of the most concerned issues in typhoon weather analysis and forecast. In the western Pacific, typhoons have roughly three paths.

The first route is west. The typhoon entered the South China Sea through the Philippines or Balintang Strait and bashi channel, and landed on Hainan Island or Vietnam to the west, which had a great impact on China.

The second route is the northwest route. The typhoon moved to the west-northwest direction and landed in Taiwan Province Province, then crossed the Taiwan Province Strait and landed in Fujian Province.

The third is the turning path. The typhoon moved northwest from the east China sea in the Philippines, turned northeast near 25 N and moved to Japan. This road has little influence on our country. The above three paths are typical cases, and different paths prevail in different seasons. Generally, landing and turning paths are the main paths in midsummer, and westbound and turning paths are the main paths in spring and autumn.