What are the three horizontal bars and hooks in the weather symbol picture?

Three horizontal bars with a hook are the symbols of blowing sand, as shown in the figure below. Blowing sand refers to a weather phenomenon caused by local or nearby dust being blown up by the wind.

When sand blows, the visibility drops significantly, and the sky is cloudy and yellow when it occurs. In the north, it is easy to appear in spring. The wind is strong during blowing sand weather, which affects the visibility between 1 km and 10 km.

Extended information:

1. Weather graphic symbols are a set of images representing weather phenomena developed to facilitate the public’s understanding and identification for dissemination by television or other public media. use.

2. The three horizontal lines represent the "fog" that often brings disaster to aviation, navigation and road transportation. Refers to a large number of water droplets or ice crystal particles suspended in the air near the ground. When this aggregate reduces the horizontal visibility distance to less than 1,000 meters, it is called fog; when the visibility distance drops to between 1,000 and 10,000 meters, it is called light fog.

Reference materials: Baidu Encyclopedia_Weather Symbols? China Weather Network_Weather Symbol Legend