Which of the following weather phenomena will occur when fish scale clouds (translucent cumulus clouds) appear in the sky?

If the translucency of the altocumulus does not change much, it is sunny. If the thickness of the cumulus clouds continues to thicken and gradually merge into layers, it means that the weather will change and even precipitation will occur.

There is a folk saying that "there are fish scales and clouds in the sky, and the wind will jump even if it doesn't rain." This kind of cloud appears because before the arrival of cold air, the cloud layer gradually decreases and thickens. Because of the unstable airflow in the upper level, a "fish scale cloud" is formed, and then there are often showers.