Why do you say the proverb "although it is a fish scale day, there is wind but no rain"

Fish scale sky refers to the sky, and some neat little clouds are arranged closely together. From the ground, it looks like fish scales and spots, and it looks like water ripples caused by a breeze blowing over the water. In meteorology, this cloud is called cirrocumulus. Cirrocumulus usually appears not only alone, but also with its cousins Cirrus and cirrostratus. Before bad weather comes, Cirrus and cirrostratus often come first. If the air flow in the upper air is unstable, some cirrus clouds and cirrostratus towels will fluctuate, and the clouds will become cirrocumulus and cumulus clouds easily. Under unstable conditions, cumulus clouds will continue to thicken and become nimbostratus, which indicates the coming of bad weather. Therefore, when the sky is full of cirrocumulus, it is a sign that the weather will turn to rain, even if it doesn't rain, there will be wind.