Why do typhoons always come! As the title suggests, thank you

The cause of typhoons is that the temperature of the sea water rises due to the direct exposure of the tropical sea surface, and the sea water evaporates into water vapor and rises into the air, while the surrounding colder air flows in and replenishes, and then rises. Due to the vastness of the sea, the circulation of air currents is constantly increasing in diameter, even several kilometers. Because the earth rotates at a high speed from west to east, the friction between the airflow column and the earth's surface occurs, because the closer to the equator, the stronger the friction force, which guides the airflow column to rotate counterclockwise, (the southern hemisphere system rotates clockwise) because the speed of the earth's rotation is fast and the airflow column cannot keep up with the speed of the earth's rotation and forms a sensory westward movement, which forms what we now call typhoons and typhoon paths.

The center of the typhoon is at the point where we currently see the wind direction in a T-shape, and it is not difficult to determine the distance and direction of the wind center according to the wind direction and wind speed. Based on my 40 years of observations, the direction of the clouds before the typhoon approaches, and whether the typhoon passes through the area, is basically accurate. There are many times when the accuracy is preceded by local forecasts.

When the maximum wind speed near the surface reaches or exceeds meters per second, we call it a typhoon. From the structure of the typhoon, it can be seen that such a huge behemoth must have unique conditions for its generation. First, there must be a vast atmosphere of high temperature and high humidity.

The temperature and humidity of the bottom atmosphere in the tropical ocean are mainly determined by the sea surface water temperature, and typhoons can only form on the warm ocean surface where the sea surface temperature is higher than 26 27, and the sea water temperature at a depth of 60 meters is higher than 26 27. Second, there should be an initial disturbance in which the lower atmosphere converges towards the center and the upper atmosphere spreads outward. Moreover, the high-level divergence must exceed the low-level convergence in order to maintain sufficient updraft, and the low-level disturbance can continue to intensify. 3. The wind speed in the vertical direction should not be too different, and the relative movement of the upper and lower layers of air is very small, so that the latent heat energy released by water vapor condensation in the initial disturbance can be stored in the air column in the eye area of the typhoon, and the warm center structure of the typhoon can be formed and strengthened. Fourth, there should be a sufficiently large geostrophic deflection force, and the earth's rotation is conducive to the formation of cyclonic vortices. The geostrophic deflection force is close to zero near the equator and increases to the north and south poles, and typhoons basically occur over the ocean about 5 degrees above the equator.

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There may be several different meanings for a guy saying "a typhoon is coming", and here are some of the possible explanations:

1.Weather phenomenon: A typhoon is a powerful cyclonic storm that usually brings severe weather such as strong winds, heavy rain, high waves, etc. If the male brother says that "a typhoon is coming", it may remind you to pay attention to the weather changes and take measures against wind and rain.

2.Figurative meaning: In some cases, a boy may use the phrase "a typhoon is coming" to describe a change or threat to someone or something.

For example, if a guy is courting a girl, he might use the phrase "a typhoon is coming" to describe his feeling of tightness and pressure.

3.Simple words: When a boy says "a typhoon is coming", it may be just a simple sentence with no special meaning. In this case, you can ask him directly what he means, or ignore the sentence.

In short, the specific meaning depends on the context and situation. If you're not sure what a guy means, it's best to ask him directly.

Typhoon classification: Typhoon Strong typhoon Super typhoon, the more destructive the typhoon is.

Typhoon Warning Every time a typhoon comes, the Meteorological Bureau will give a warning, which is divided into red warning for typhoons (particularly severe), orange warning (severe), yellow warning (severe), and blue warning (general).

Typhoon landfall area Some people will say that the typhoon landfall in the high ridge area is the most severely affected, but generally speaking, the area on the far right side of the typhoon is the most severely affected.

Typhoons bring rain Generally speaking, typhoons are accompanied by rainfall, which is formed because the monsoon carries water vapor to land.

Typhoon precautions When a typhoon comes, you must not go out, do not hide in buildings, large trees, etc., or hide in buildings. Close the doors and windows, pay attention to hygiene and water safety after the typhoon, I hope it can help everyone.

Take precautions.

1. Typhoon damage is serious, don't ignore it. The incidence of injuries in people who do not pay attention to typhoon hazards is 17 times higher than that of people who do.

2. The key time for the prevention of typhoon injuries is 1 6 hours before the typhoon makes landfall, especially 3 4 hours before landfall, not when it makes landfall. Therefore, all preparations should be completed 12 hours before the typhoon landfalls, and 1 to 6 hours before the typhoon makes landfall, you should avoid going out and stay inside as much as possible. People who are not inside the house are 4 times more likely to be injured than those who remain inside.

3. The prevention of typhoon injuries focuses on men and the elderly, especially those over 70 years old.

4. The main causes of injuries and deaths caused by typhoons are collapsed houses, injuries and falls caused by hard objects, so people in dangerous houses must be evacuated in time.

5. Strengthen doors and windows 12 hours before the typhoon, and do not close doors and windows or repair houses temporarily.

Typhoon Blue Warning Signal Meaning: It may be affected by a tropical cyclone within 24 hours, with an average wind force of 6 or more, or gusts of 7 or more; or already affected by a tropical cyclone, with an average wind force of 6 7, or gusts of 7 to 8 and may continue.

Yellow Typhoon Warning Signal Meaning: It may be affected by a tropical cyclone within 24 hours, with an average wind force of 8 or above, or gusts of 9 or above; or already affected by a tropical cyclone, with an average wind force of 8 9, or gusts of 9 to 10 and may continue.

Typhoon Orange Warning Signal Meaning: It may be affected by a tropical cyclone within 12 hours, with an average wind force of 10 or more, or gusts of 11 or more; or already affected by a tropical cyclone, with an average wind force of 10 11, or gusts of 11 to 12 and likely to continue.

Typhoon Red Warning Signal Meaning: It is likely to be affected by a tropical cyclone within 6 hours, with an average wind force of 12 or more, or has reached 12 or more and is likely to continue.

Typhoons can be prevented, in today's rapid development of science and technology, with modern equipment can already accurately ** the specific direction of movement, landing place and time of typhoon. As long as effective defensive measures are adopted, the level of scientific detection and early warning is raised, and all efforts are made to do a good job in prevention, resistance, and rescue, so as to pursue advantages and avoid disadvantages, so that the degree of disaster damage can be reduced to the minimum. Before the typhoon comes, it is necessary to pay attention to the typhoon disastrous weather warning information issued by meteorological stations at all levels, and in order to ensure the safety of the lives of primary and secondary school students, make corresponding preparations in advance, minimize going out, and stay away from low-lying areas and dangerous areas such as seasides and dangerous facilities or items such as trees and billboards; Schools, students, and residents located in dangerous areas will be moved to safe areas in advance.

1. When the typhoon comes, it is necessary to understand the dynamics of the typhoon in a timely manner according to various conditions, and the personnel should move to a safe area in time, avoid the places that are easy to cause the first (dilapidated housing, factories, sheds, temporary buildings), and do not take shelter from the wind and rain in the above places.

2. The water conservancy department shall conduct a comprehensive inspection and inspection of water conservancy facilities such as mountain ponds, reservoirs, and embankments. Departments such as ocean, maritime and aquatic products, and shipping should notify ships going to sea to return to port or take shelter from the nearest storm.

3. Suspended and high-altitude facilities such as scaffolding, signboards, neon signs, and cranes should be reinforced, and flower pots and other items exposed on balconies and windows should be moved indoors.

4. Residents should tie the doors and windows tightly, especially the aluminum alloy doors and windows. Put away all kinds of hangings inside and outside the house; Close doors and windows, and add planks if necessary; Check the wiring, prepare flashlights, candles, and store drinking water in case of power and water outages; Prepare extra food and vegetables for a day or two, and do not go out unless necessary.

5. Primary and secondary schools, kindergartens, and nurseries may temporarily suspend classes at their own discretion.

6. Residents of dilapidated houses should be moved quickly; To cut off the outdoor power supply to the neon billboard.

7. Stop high-altitude and outdoor dangerous operations; All kinds of open-air group activities and indoor large gatherings are stopped. In the event of a typhoon, take shelter in a hut or cave. In case of strong winds, try to lie on the ground and escape to the bushes, and do not hide under dead trees.

8. Livestock and important materials should be safely protected and transferred.

9. If you encounter a debris flow, you should master the correct escape method. When you are in a debris flow area, you should run up the slopes on both sides and leave the ditch and valley area. You should choose to stay in a place where the base is stable and relatively gentle and open.

10. When the typhoon signal is lifted, you can only return after the evacuation area has been declared safe, and do not use gas, tap water, electric wires, etc.

Preparation points before a typhoon 1Listen, watch or check the typhoon warning information on the Internet in time to understand the best anti-typhoon action countermeasures. 2.

Close doors and windows tightly, and fasten structures that are easily blown by the wind. 3.Move from a dilapidated house to a safe place.

4.People in low-lying areas that may be flooded should be evacuated in a timely manner. 5.

Check whether the electrical circuit, furnace, gas and other facilities are safe. 6.Kindergartens and schools should take temporary shelter measures and suspend classes when necessary.

7.Open-air group activities or large-scale indoor gatherings should be canceled in a timely manner, and evacuation should be done. 8.

Do not travel to areas where typhoons pass by, swim at beaches, and do not go out to sea by boat. How to avoid a typhoon? 1.

Try not to go out. 2.If you are outside, do not take shelter near temporary buildings, billboards, towers, trees, etc.

3.If you are driving, you should immediately move to an underground parking lot or shelter. 4.

If you live in a tent, you should immediately put away your tent and take shelter from the wind in a sturdy, sturdy house. 5.If you are on the surface of the water (e.g. swimming), you should immediately go ashore to take shelter from the wind and rain.

6.If you are already in a sturdy house, you should carefully close the windows and tape the window panes in a "m" shape to prevent them from breaking. 7.

If there is a typhoon and thunder, lightning protection measures should be taken. 8.After a typhoon, it is necessary to pay attention to environmental hygiene, food and water safety.

At 5 o'clock this afternoon, the center of this year's No. 15 typhoon "Seagull" was located on the sea surface about 610 kilometers south-east of Leizhou City, Guangdong Province, that is, north latitude and east longitude, with a maximum wind force of 13 (38 meters and seconds) near the center, a minimum pressure of 965 hPa at the center, a wind circle radius of 280 480 kilometers for level 7, a radius of 110 120 kilometers for a wind circle of 10, and a radius of 60 kilometers for a level 12 wind circle.

It is expected that the "Seagull" will move west-northward at a speed of about 30 kilometers per hour, gradually approaching the coastal areas from western Guangdong to the eastern part of Hainan Island, and will continue to strengthen in intensity, and will make landfall in the coastal areas from Yangjiang, Guangdong to Wanning, Hainan from the morning to the afternoon of the 16th, and the landfall intensity is expected to be a strong typhoon (14 15, 45 50 m s).

Shantou, Guangdong: Typhoon "Sarika".

Hope it helps.