What are the weather symbols of the three curves?

According to Gaosan. com, Sanwan is a symbol of sand blowing weather. Sand blowing is due to the local or nearby dust blown by the wind, and the visibility is obviously reduced, and the sky is black and yellow when it appears. The north is easy to appear in spring.

Weather symbols are special symbols representing various weather phenomena, clouds and sky conditions. Includes weather phenomenon symbols for observation and recording and weather graphic symbols for media communication.