Is there really hail in Wuhan on July 28th? How did hail come about? What season is frequent?

Of course it's true. It rains heavily in Hankou and it rains heavily in Wuchang. The biggest hail is as big as a soldier's ball (the newspaper reported the photo).

cause

The weather is hot in summer, and the sun is scorching the earth, which is easy to produce a lot of hot and humid air near the ground. Hot and humid air rises rapidly and the temperature drops sharply, sometimes even as low as -30℃. The water vapor in the hot air condenses into water droplets and quickly freezes to form small ice beads. Small ice beads roll up and down in the clouds, constantly adhering and condensing the surrounding water droplets into ice, getting heavier and heavier, and finally falling from the sky. This is hail. It can be seen that hail can only be produced when the hot and humid airflow rises strongly. It is estimated that its airflow must rise faster than 20 meters per second. Therefore, hail usually occurs in summer. In winter, the temperature near the ground is very low, so it is impossible to produce strong and rapid updraft, so it is impossible to form hail. Hail is very harmful. It destroys crops, damages houses and hurts people and animals. At present, people have developed effective means to carry out artificial rainfall before the occurrence of hail, so that hail can not be formed, in order to eliminate the disasters caused by hail.