Typhoon Oulu hit, and there was heavy rain in most areas of Guangdong and Guangxi. Why does it rain when the wind blows?

On September 28th, the Central Meteorological Observatory issued a typhoon warning. Typhoon Oulu hit and there was heavy rain in most parts of Guangdong and Guangxi. This time, the impact on the downstream flow is not great, but typhoon 16 is strong and moving fast, so we should also pay attention to prevention. The storm began to intensify and heavy rain came. Let's see why it rains when a typhoon strikes.

A typhoon is a huge rising cloud.

A typhoon is a rising crowd, and then its airflow gradually rises. Then if it is in coastal areas, the typhoon will bring a lot of water vapor to the road surface after passing through the ocean, and then the temperature of the water vapor will become lower because of the rising airflow. In addition, light radiation will increase the temperature of the surrounding air, and then it will expand. Water vapor moves from high temperature area to low temperature area. After the temperature drops, it will condense into small water droplets, which will form the core of rainfall, thus forming a large amount of rainfall, causing rainfall.

Typhoon landing often produces heavy rain.

After the typhoon landed, its moving track was not very regular because of the friction with the ground. There is precipitation in the updraft in the wind, and there is sufficient water vapor in the typhoon area, and the upward movement is also relatively strong, so the precipitation will increase. Moreover, the typhoon center is the typhoon eye, and there will be downward airflow, while the updraft prevails outside the typhoon eye, so there will be a wide range of rainfall, and the rainfall will be much more than usual, with an average of more than 800 mm.

Typhoon is not only a wind, but also a weather system.

Meteorology usually calls typhoons tropical cyclones, and then cloud cover can reflect water vapor. Tropical cyclones often carry a lot of water vapor, and these water vapors are all of temperature, which will suck some warm and humid gases from the sea into the vortex and then disperse them into the air, which will cool these warm and humid gases in the air and then form water droplets, thus forming precipitation, that is, rain, which is the reason why typhoons cause rain.