The rainstorm in Zhengzhou instantly turned into night during the day. What are the precursors before extreme weather comes?

In our daily life, I believe many people hate extreme weather very much. When faced with some extreme weather, many people will feel very upset and their mood will be seriously affected. When extreme weather comes, there will be some very obvious signs. In the summer of 2022, extremely hot weather swept across the country, and many people's lives were seriously affected. The rainstorm in Zhengzhou instantly turns to night during the day, so what are the precursors before the extreme weather comes?

When many people see the weather forecast, they will think that the rainstorm in Zhengzhou suddenly turned into night during the day, which is really shocking. In the video, we can see that in just a few minutes, the whole sky in Zhengzhou changed from clear sky to dark clouds, accompanied by very heavy lightning. Before the arrival of extreme weather, there were indeed some signs, but when the weather in Zhengzhou suddenly changed, there were no signs at all, because the weather change in Zhengzhou was not the arrival of extreme weather at all.

Before the arrival of extreme weather, there must be some precursors, because only in this way can meteorologists make relevant predictions about the weather. In the summer of 2022, extreme high temperature weather has slowly arrived in China, and meteorologists have made relevant predictions about this phenomenon. This is because the rainy season is long. So after the long rainy season, there will be extremely hot weather, but this statement is not 100% correct, because the weather is unpredictable, so we should not be so absolute when making weather forecasts.

We can also see some signs before the storm comes. Dark clouds will soon cover the sky of the whole city, giving people a very depressing feeling. So when the weather comes, there will be some signs, but we probably don't quite understand what such signs mean, but meteorologists can quickly judge what the next weather will be like when they see such signs.