| 11. | A swift current of air at 5, 000 feet developed over western Florida when the sun set.
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| 12. | Within the storms, sinking currents of air transferred momentum from fast winds aloft toward the Earth's surface.
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| 13. | Tornadoes form when rising currents of air tilt these horizontal rolls into spinning, vertical columns of air.
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| 14. | With each current of air, the panels waft gently like sheets hanging on a clothesline in summer.
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| 15. | Subsiding currents of air behind the tropical system will squelch clouds across the southern Plains and Texas.
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| 16. | In spring, the rising currents of air that generate clouds are inhibited over the still chilly waters.
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| 17. | Upward currents of air support the weight of suspended particles and hold them indefinitely in the surrounding air.
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| 18. | When tropical skies are clear, forecasters use infrared images of water vapor to detect steering currents of air.
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| 19. | As the sun heats the ground, rising currents of air will generate puffy cumulus clouds across the region.
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| 20. | Underground however, brattices remained vitally important for directing the current of air throughout the whole of the colliery.
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