| 21. | It weakened Thursday to a tropical depression and then became a low pressure center before regaining strength.
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| 22. | High-pressure centers over the Dakotas and Ohio Valley will gradually merge as the cold front between them dissipates.
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| 23. | Nevertheless, heavy rain will fall near the low-pressure center as it moves northeast across eastern Alabama and Georgia.
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| 24. | In the wake of the low-pressure center, drier air will surge north along the east slopes of the Appalachians.
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| 25. | Bands of heavy rain will swirl around a tropical low pressure center as it moves into Louisiana later Saturday.
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| 26. | Periods of snow will occur in the Great Lakes States as a low pressure center moves toward southern Michigan.
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| 27. | The steadiest rain will be north of the low pressure center over the interior Northeast for much of Saturday.
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| 28. | A vigorous low-pressure center will move northeast from the central Rockies spreading rain and snow into the Dakotas and Minnesota.
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| 29. | On January 9, the low pressure center over the Great Lakes region became the dominant low of the storm complex.
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| 30. | The initial low pressure center moved southeastward into the Ohio Valley as a weak cyclone between March and March 17.
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