Why does the rainstorm in Henan last for a long time? Is the water in the cloud really endless?

First of all, it can't stop for a long time, because the heavy rainfall in Henan is blocked by the high pressure in the north, the convergence zone formed by the humid air in the south at the border, and the mountainous terrain uplift. The long-term maintenance of high pressure in the north and the confrontation with warm air flow are the reasons for the continuous formation of this rainstorm in Henan.

Secondly, in a sense, it is indeed endless. The reason is very simple. Because of the sunlight, the water on the ground will continuously evaporate into the air, thus forming a water vapor cycle on a global scale, and it will never rain in the foreseeable future.

The meaning of rainstorm:

Precipitation with rainfall exceeding 50 mm for 24 consecutive hours. According to China's meteorological regulations, rain with a precipitation of more than 50 mm in 24 hours is called "rainstorm". According to its precipitation intensity, it is divided into three grades, that is, the 24-hour precipitation is 50 ~ 99.9 mm, which is called "rainstorm"; /kloc-rainstorm below 0/00 ~ 250 mm; More than 250 mm is called "rainstorm".