What are the signs before the typhoon comes?

1, the land-sea wind is not obvious: usually the wind blows from the sea to the land during the day and from the land to the sea at night, which is called sea breeze and land breeze, but this phenomenon is not obvious a few days before the typhoon.

2. The appearance of high clouds: At the outermost edge of the typhoon, there are cirrus clouds, white feather-like or ponytail-like high clouds. When such a cloud appears in a certain direction and gradually thickens into a dense cirrostratus, it indicates that there may be a typhoon approaching.

3. Good visibility: Two or three days before the typhoon came, the visibility improved, and trees in the distance could be clearly seen.

4. The shower stopped: When the high clouds appeared, the clouds gradually became denser and lower. Sometimes there was heavy rain, and sometimes there was no rain, which meant that the typhoon was approaching.

5. The thunderstorm stopped: when there should have been a thunderstorm, it suddenly disappeared, indicating that the typhoon was coming.

6. Change of wind direction: For example, southwest wind is often blown in summer in Taiwan Province Province, which is also gentle. When it turns to the northeast wind, it means that the typhoon is approaching and has begun to be affected by the edge of the typhoon, and then the wind speed will gradually increase.

7. Special sunset glow: Two days before 1 and the typhoon hit, when the sun sets, several beautiful rays of red and blue radiation are often emitted from the western horizon, which are emitted to the zenith and then converge in the symmetry between the east and the sun. This phenomenon is called anti-twilight.

8. Air pressure reduction: According to the above phenomenon, if the air pressure gradually decreases, it means that it will enter the edge of the typhoon.

Extended data:

The low-pressure vortex occurring on the surface of tropical or subtropical ocean is a powerful and deep tropical weather system. It is a tropical cyclone classification of Asia-Pacific countries or regions north of the equator and west of international date line.

Meteorologically, according to the definition of the World Meteorological Organization, the sustained wind speed at the center of tropical cyclone reaches 12, which is called hurricane or other words near the surface. "Typhoon" and "hurricane" are both tropical cyclones, but they happen in different places and have different names.

References:

Baidu Encyclopedia-Typhoon