What weather does the fish scale cloud represent?

Fish scale cloud represents a weather phenomenon that cold air comes in autumn and winter, and then it will rain.

Semi-transparent cumulus clouds, with fish-scale white clouds, are a kind of cloud layer when strong cold air comes, indicating unstable weather conditions. Semi-transparent cumulus clouds are thin and white, and are usually arranged neatly in one or two directions. There are obvious gaps between clouds, and even the edges of seamless clouds are bright.

Fish scale cloud refers to a large-scale cloud with a large gap between clouds. The appearance of such clouds is a sign that the weather will clear up, and there will be clear skies in Wan Li and Wan Li for two or three days. The reason is that the cold air at high altitude sinks, breaking through the continuous clouds and forming fish scale clouds. Cold air sinks to the ground and is heated, so the water in the air evaporates, the relative humidity decreases, the air pressure rises, and the clouds also rise, resulting in continuous sunny days. Such clouds usually appear in autumn, and soon there will be signs of crisp autumn.

main feature

Generally speaking, in translucent cumulus clouds, before the arrival of cold air, the clouds gradually thicken and distribute in layers. When thick clouds "squeeze" each other, they will appear fish-scale clouds. Meteorologists say that this scale cloud will become a rain cloud when it accumulates to a certain extent. The characteristic of translucent cumulus clouds is that the clouds are at a relatively high height, thin and white, and often arranged neatly in one or two directions. There is an obvious gap between clouds. Even if there is no gap, the edge of the cloud is bright, and the position of the sun and the moon can be distinguished.

For wave clouds, the outline of clouds is clear, often in the shape of oblate circle, tile, fish scale, or dense water clouds, arranged in groups, rows and waves. The apparent width angle of most clouds is 1~5 degrees, and sometimes it can appear at two or more heights. Thin clouds are white and thick clouds are dark gray. On the thin cumulus clouds, there are often rainbow colors around the sun and the moon, or Chinese rings with red outside and blue inside.

Refer to the above content: Baidu Encyclopedia-translucent cumulus clouds