| 21. | A vigorous low pressure system will approach the Northwest coast.
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| 22. | A low pressure system off the Pacific coast produced snow and rain in California.
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| 23. | Powerful winds are typically associated with deep low pressure systems.
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| 24. | It was downgraded to a low pressure system, and sunshine returned to around Tokyo.
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| 25. | Interacting with an upper level low pressure system over Japan, the typhoon became elongated.
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| 26. | Rain will accompany a potent Pacific low pressure system into Washington, Oregon and California.
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| 27. | A low pressure system and its attendant cold front will cross the Northeast Tuesday.
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| 28. | Forecasters blamed the latest rains on a low pressure system off Nicaragua's Atlantic coast.
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| 29. | The low pressure system spiraled over eastern Texas, dumping flooding rains there and into Louisiana.
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| 30. | A sudden reduction in pressure usually means that a low pressure system has moved in.
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