The necessary conditions for the formation of Shacheng weather are:

The first is the material basis, that is, sand and dust. There are two reasons for the formation. One is that it is close to the desert area and strong winds transport sand and dust materials. Second, the climate is dry and precipitation is low, causing dust on the ground.

The second is strong wind, which is the power basis for the formation of sandstorms and the power guarantee for the long-distance transportation of sandstorms. For most areas in northern my country, it is mainly cold waves (northwesterly winds) in spring and autumn, or local circulation caused by uneven heating of the surface, resulting in short-term strong winds. The third is unstable air conditions. This is an important local thermal condition. The fact that sandstorms mostly occur in the afternoon and evening illustrates the importance of local thermal conditions. The temperature rises rapidly in early spring and atmospheric instability is also one of the factors.