dust storm

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dust storm A storm in which dust is blown up from the ground. It occurs when the wind speed exceeds a critical value (commonly 24–48 km/h) that depends on quantity of dust present and the size, shape, dampness, and specific gravity of the dust particles. Dust may be carried to a height of 1500–1800 m or more. The haboob and khamsin are types of dust storm.

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