Omen before the typhoon: the temperature gradually rises, the humidity gradually increases, the weather becomes cloudy and the air is filled with the smell of sea water, etc.
1. Temperature increases gradually: When a typhoon arrives, the weather gradually becomes humid and the temperature gradually increases in the few days before the typhoon arrives.
2. Humidity increases gradually: Before the typhoon approaches, the humidity will gradually increase and the moisture content of the atmosphere will also gradually increase. This is also one of the reasons why we experience difficulty in breathing.
3. The weather becomes cloudy: When a typhoon arrives, the initially sunny weather will gradually become dark, and the clouds will become dense, like a big pressure hanging over our heads.
4. The air is filled with the smell of sea water: when a typhoon arrives, theThe air is also filled with the smell of seawater, as the strong airflow brought by the typhoon can carry the salt. in seawater in air and dispersion.
Typhoon Levels
1. Blue Typhoon Warning Signal
A tropical cyclone may or has been affected within 24 hours. Either the average land wind strength reaches level 6 or higher, or the gust reaches level 8 or higher and can continue.
2. Typhoon ** early warning signal
It may be or has been affected by a tropical cyclone within 24 hours. The average wind force along the coast or land reaches level 8 or. above, or the burst reaches level 10 or higher and can continue.
3. Orange typhoon warning signal
It may be or has been affected by a tropical cyclone within 12 hours. The average wind force along the coast or land reaches level 10 or more. or the burst reaches level 12 or higher and can concontinue.
4. Red Typhoon Warning Signal
It may be or has been affected by a tropical cyclone within 6 hours. The average wind strength along the coast or land reaches level 12 or higher. or the burst reaches level 14 or higher and can continue.
How strong is the breeze?
1. The most destructive power of typhoons should be on the periphery, because it is a type of rotating gas, which contains geographical knowledge cyclones and anticyclones, so typhoons are part of it, and there are actually no big ones storms at its center.
2. The atmospheric pressure in the center of the typhoon is the lowest, and the wind speed is also very low. It is a breeze or a calm wind. Wind speed increased sharply around the center of the typhoon, reaching a maximum value. The center of the typhoon is also called the "eye of the typhoon", where the air flows and the wind is weakest, which is themeteorological characteristic of a tropical cyclone once it has “matured”.
The breeze is a category 3 wind. In the breeze, leaves and twigs sway and the flag can be displayed.
Wind force refers to the force of the wind blowing on objects. Generally, the wind force is divided into 18 levels according to the different phenomena caused by the wind blowing on objects on the ground or on the water surface, the minimum being level 0 and the maximum being level 17.
Detailed information:
Definition of wind level:
The China Meteorological Administration issued the "Regulations on Typhoon Activities and Services" in 2001, which added the Beaufort wind level to typhoons above level 12 to level 17. class. Category 12 typhoons are pegged at 32.4-36.9 m/s; category 13 is 37.0 to 41.4 m/s; category 14 is 41.5 to46.1 m/s; category 15 is 46.2 to 50.9 m/s; /s seconds, level 17 is 56.1 to 61.2 meters/second. 30 years ago, the maximum wind force near the typhoon center in Qionghai was 73 meters/second, which exceeded the highest standard of level 17. Calling it category 18 is also a common saying in the community International Navigation Commission regarding extremely large typhoons.
Wind speed formula:
It's "all the way up to nine, multiply by 2 to get each level". This means: from level one to level nine, multiply each level by 2 to get approximately the maximum wind speed. For example, the maximum wind speed of level 1 is 2 meters per second, that of level 2 wind is 4 meters per second, that of level 3 wind is 6 meters per second... and so on. . There are also transition numbers between different wind levels. For example, the windLevel 1 is 1 to 2 meters per second, level 2 wind is 2 to 4 meters per second, level 3 wind is 4 to 6 meters per second, and so on. .
Reference: