Cloud Streets, Tiladumati Atoll, Maldive Islands Small cumulus clouds frequently form in parallel rows or "cloud streets" in stable air conditions. These cloud streets over the reefs of the Maldive Islands in the Indian Ocean denote the prevailing wind direction, the cloud streets lying parallel with the wind. Turbulent air lifted by the windward portions of the islands promotes cloud formation downwind. (Courtesy LPI/NASA. Picture #13-35-1459)
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