What are the characteristics of blowing sand and sandstorms?

Blowing sand and sandstorms are caused by local or nearby dust being blown up by the wind. Its unique characteristic is that the visibility drops significantly, and the sky is turbid and yellow when it appears. Both of them mostly appear when cold air passes or is affected by thunderstorms or squall lines. In the north, they are prone to appear in spring. The difference is that the sand blowing weather is very windy and affects the visibility between 1 km and 10 km, while the sand and dust storm is very windy and the visibility is less than 1 km. Floating dust is formed when fine particles such as dust and sand are suspended in the air after a sandstorm or blowing sand occurs in a remote or local area. It is commonly known as "falling yellow sand". When it appears, distant objects appear earthy yellow, the sun appears pale or light yellow, and the visibility is less than 10 Kilometers, roughly appearing before and after the passage of cold air.