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Peschannaja storm.
When the wind force reaches a certain degree, loose particles of sand can no longer lie quietly on the surface. And one by one they rush forward.
So gradually formed a sandstorm. The height of the walls of sand can reach 1, 6 km, tons of sand at high speed rush forward to meet such - the same as at full speed crashing into the wall.
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So gradually formed a sandstorm. The height of the walls of sand can reach 1, 6 km, tons of sand at high speed rush forward to meet such - the same as at full speed crashing into the wall.
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Source: