What are the weather signs when scale clouds appear?

Translucent cumulus clouds are also called scale clouds. If this cloud stays the same (thickens) for a long time, it means that it will be sunny in the future. However, if the scale cloud starts to thicken and the gap between clouds becomes smaller, windy weather and even rain may occur.

A good situation: if there are rules (such as strips or meshes) between the clouds of the fish scale cloud, the gap between the clouds is relatively large. Then the appearance of this cloud is a sign that the weather will clear up, and the sky is clear in Wan Li. This often happens in autumn.

On the other hand, if the scale clouds gradually become thicker and layered, or the gap between clouds becomes narrower, it means that the translucent cumulonimbus clouds have become cumulonimbus clouds, and it may rain soon. This happens mostly in summer.

Extended data

Reasons for the formation of scale clouds:

The sun shines on the surface of the earth, and water evaporates to form water vapor. Once the water vapor is supersaturated, water molecules will gather around the dust (condensation nucleus) in the air, and the generated water droplets or ice crystals will scatter sunlight in all directions, thus generating clouds.

Because clouds reflect and scatter electromagnetic waves in all bands, their colors are gray, and when they are thin, they are white, but when they become too thick or dense for sunlight to pass through, they may look gray or black.

When the clouds become thick and dense, the cold air at high altitude will sink and break through the clouds. After sinking to the ground, it will be affected by geothermal heat, which will increase the ground pressure and the clouds will rise, and a clear Wan Li will appear in the middle.

When cold air comes, the clouds will thicken and present a dense layer. Because the distance between layers is very close, collisions will occur. In this case, the shape of fish scales will also appear, but this situation will bring rainfall.

Baidu encyclopedia-translucent cumulus clouds