There is a phenomenon that occurs in summer, with heavy rain and strong winds. We used to call it a dragon. What happened to it? Why does it happen every year? When did it happen?

I haven't answered geography questions for a long time, and I feel very kind here, hehe. ....

I remember that in April of 2008, I accidentally went to Jiangxi and stayed there for a while. It seems to be the third day of the third lunar month. In Poyang County, according to the your lunar calendar, it should be "dragon crossing". The so-called Longdu means that there will be a sudden storm that day. It was at this moment that Nanchang experienced the Longdu that night. At about 6 pm, it was dark, the clouds in the sky were like dragons, the wind was raging, the dust and leaves on the road were intertwined, and pedestrians on the road fled. Less than 15 minutes after the lightning, it began to rain cats and dogs!

You have a Jiangxi person who joked that cutting the dragon's tail with a knife means, in folk customs, that the dragon gets into trouble after crossing the tail!

In fact, the reason for this phenomenon is the sudden storm caused by the intersection of cold and warm air. In April, the temperature in South China gradually rose, and there were more days controlled by warm air. However, the cold air in the northwest will still affect South China. When cold air meets warm air, it often produces stormy weather. The clouds in the sky are a bit like the legendary dragon. Personally, I think it's not the "tornado" weather upstairs!

I hope it helps you!