How is the typhoon classified?

Typhoon refers to a tropical cyclone formed on the vast sea surface above 26 ℃ in the tropics or subtropics. According to its intensity, it can be divided into six grades: tropical depression, tropical storm, severe tropical storm, typhoon, strong typhoon and super typhoon. Since 1989, China has adopted international tropical cyclone names and classification standards. Let's take a look at how typhoon grades are classified.

Tropical depression

[basic overview] Tropical low pressure is a kind of tropical cyclone, which belongs to the weakest level of tropical cyclone intensity, with maximum winds of 62 kilometers per hour or less. It is the most important origin of typhoon and the last volunteer to disappear.

[wind speed] 6-7.

[wind speed] 10.8 to 17.1 m / s.

Tropical storm

[basic Overview] Tropical storm is a kind of tropical cyclone. It refers to a tropical cyclone with a maximum wind of 89.0 (17.2-24.4 m / s) near the center. the occurrence of a tropical storm requires the existence of a weak tropical vortex (tropical low pressure), but the tropical storm brings abundant fresh water to people. Tropical storms bring a large amount of Rain Water to the coasts of China, the coast of the Sea of Japan, India, Southeast Asia and the southeastern United States, accounting for more than 1. 4% of the total precipitation in these areas. It is of great significance to improve the fresh water supply and ecological environment of these areas.

[wind speed] 8-9.

[wind speed] 17.2-24.4 m / s.

Severe tropical storm

[basic overview] A severe tropical storm is a kind of tropical cyclone. The maximum average wind speed near the bottom center of the severe tropical storm is 24.5-32.6 m / s, and the maximum wind near the bottom center is 10-11. When the maximum wind near the center of a tropical cyclone is 10-11 (24.5-32.6 m / s), it is called a severe tropical storm. If severe tropical storms continue to strengthen, they will form typhoons.

[wind speed] 10-11.

[wind speed] 24.5 to 32.6 m / s.

Typhoon

[basic Overview] Typhoon is a category of tropical cyclones. In meteorology, according to the definition of the World Meteorological Organization (WMO), tropical cyclone centres with persistent winds of magnitude 12 to 13 (i.e. 32.7 m to 41.4 m per second) are called typhoons or hurricanes, the name of hurricanes is used in the North Atlantic and the eastern Pacific, while the synonym used in the western North Pacific (north of the equator, west of the international date line, east of longitude 100 degrees east) is typhoon, which is called a strong typhoon when it continues to strengthen.

[wind speed] 1213.

[wind speed] 32.7 to 41.4 m / s.

Strong typhoon

[basic Overview] A strong typhoon refers to a tropical cyclone with a maximum wind force of 14,15 (41.5 to 50.9 m / s) near the center. When a strong typhoon continues to strengthen, it will become a super typhoon. If the intensity of a strong typhoon weakens, it will become a typhoon. When a strong typhoon occurs, it is often accompanied by torrential rain, sea tides and tsunamis. When it occurs, it is irresistible and easy to cause casualties. Strong typhoons bring sufficient Rain Water to the vast area and become a rainfall system closely related to human life and production. However, strong typhoons always bring all kinds of damage. It is also a serious natural disaster in the world.

[wind speed] 14-15.

[wind speed] 41.5 to 50.9 m / s.

Super typhoon

[basic Overview] Super typhoons are the strongest tropical cyclones. When the wind speed is greater than 51.0 m / s, it is called a super typhoon, the highest wind speed can reach more than 300 kilometers per hour, wherever it goes, it can directly cause disaster to human beings. This kind of wind force is rare and destructive on land. At sea, the waves are extremely huge waves of more than 14 meters or more, foaming all over the sky and extremely low visibility. Therefore, the wind of super typhoon is obviously more severe, and it has serious damage, and it is one of the most serious natural disasters in the world.

[wind speed] ≥ 16.

[wind speed] ≥ 51.0m / s.