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strong dry wind blowing over the desert that raises and carries along clouds of sand or dust often so dense as to obscure the sun and reduce visibility almost to zero; also known as a duststorm.
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a hot, dry, usually westerly or southwesterly wind in the deserts of North Africa and the Arabian Peninsula. Simooms are violent squall-like winds of short duration and often carry large amounts of sand and dust. They are most common in spring and summer.