Clouds are the protagonist of the sky, the sky is the stage of clouds, clouds are the carrier of rain, and the signboard of wind. Thousands of clouds dot the sky, and the scenery of the clouds is spectacular and changeable, which makes people feel refreshed and happy, and also indicates the change of weather. Weather has a great impact on human activities, not only on production and labor, daily life, but also on aviation, navigation, the flight of various aircraft, and the pros and cons of the war environment. Since ancient times, people have paid attention to clouds and weather, ** weather, in order to seek advantages and avoid disadvantages.
As early as the Northern Song Dynasty, Shen Kuo was very attentive to the weather, when it went out to travel, it started from the fifth watch, looked at the stars and the moon in all directions, and the sky was not cloudy before setting off, and it was settled before noon, and it was rare to encounter the unfavorable weather of the storm and rain in this way. In "Mengxi Writings", it is said that he predicted the weather accurately, which was valued by Song Shenzong, and his experience was passed on among the people. So far, in Sichuan and Guizhou, there are sometimes couplets on the front lights of small inns in villages and towns in Sichuan and Guizhou, and there are couplets of "staying before it is late, and watching the sky early when the rooster crows". Today, with the development of science and technology, China's meteorological support has developed rapidly, has entered the world's advanced ranks, the accuracy of weather forecasting has reached and exceeded 86%, but there is still a lot of room for development, advancing with the times, providing better protection for people's production and life. Inheriting the practical experience of predecessors, popular science meteorological knowledge, although it is only for reference, but people look at the sky and the earth, it is also a hobby, which is conducive to seeking advantages and avoiding disadvantages.
According to the records of "Lü's Spring and Autumn Clan", China divided the clouds into four kinds before 2000 years ago, namely mountain clouds, water clouds, dry clouds, and rain clouds. With the deepening of human understanding of clouds, there are currently four cloud families in the world: high cloud group, medium cloud group, low cloud group, straight cloud group, etc., each cloud family includes several kinds of clouds, each cloud indicates different weather conditions, some weather conditions are coming soon, some weather will come in the next few hours, and some will appear a few days later. Plan ahead and prepare early.
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