| 21. | Potent thunderstorms will develop in the Middle Atlaates as the cold front interacts with a moist, unstable air mass.
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| 22. | They also occur in the cool unstable air that often follows the passage of a cold front from the sea during winter.
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| 23. | This mesoscale front, when moving into a warm and unstable air mass, will lift it and cumulus clouds appear on satellite pictures.
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| 24. | During summer, the Bay of Bengal is subject to intense heating, giving rise to humid and unstable air masses that produce cyclones.
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| 25. | The report also predicted humidity would fall overnight, creating dry and unstable air, making for conditions in which wildfires can easily rage.
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| 26. | Another favored zone of thunderstorms will lie across the Gulf coast where local sea breezes serve to lift very warm, unstable air.
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| 27. | In common with the rest of the British Isles, wind prevails from the south-west, bringing warm, wet and unstable air from the Atlantic.
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| 28. | Farther south, showers and clusters of thunderstorms will develop in the warm, unstable air from eastern North Carolina to the Chesapeake Bay area.
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| 29. | During summer, the Bay of Bengal is subject to intense heating, giving rise to humid and unstable air masses that morph into cyclones.
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| 30. | In essence, such " elevated " storms are spawned in an environment with cold, stable air near the ground and moist, unstable air aloft.
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