Strong winds blow a lot of dust on the ground, so what is the weather phenomenon that the average visibility is less than several meters?

Visibility less than 10km is called floating sand or floating dust (depending on the main particles that cause visibility decline).

Visibility less than 1km is called sandstorm.

Sandstorm intensity is divided into four grades:

1, 4 ≤ wind speed ≤ 6,500m ≤ visibility ≤ 1000m, which is called weak sandstorm;

2, 6 ≤ wind speed ≤ 8,200 meters ≤ visibility ≤500 meters, which is called medium-intensity sandstorm;

3, the wind speed is greater than 9, and the visibility below 50 meters is less than 200 meters, which is called a strong sandstorm;

4. When it reaches its maximum intensity (instantaneous maximum wind speed ≥ 25m/s, visibility ≤ 50m, or even reduced to 0m), it is called a particularly strong sandstorm (or black storm, commonly known as "black wind").

Source:/link? URL = MSI 2 zipmlt-yp 8 guu 8 mlsxbcr j 8 tmwq 09 raqgy 9 RH 17z 7 ubwpec 8 nijy 8 wh 9 nnkrpow _ qici 6 chbhegtdxixsvor 4j 0 zttegnl _ p 3 fvpzxc # 1