| 1. | Precipitation commonly becomes heavier and more widespread if it thickens into nimbostratus.
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| 2. | Though found worldwide, nimbostratus occurs more commonly in the middle latitudes.
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| 3. | As it cools, any water vapor that is present will nimbostratus.
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| 4. | The nimbostratus are flat; the cumulonimbus are puffy.
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| 5. | Nimbostratus usually has a thickness of about 2000 m.
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| 6. | Clouds of the genus nimbostratus tend to bring constant precipitation and low visibility.
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| 7. | Fractonimbus may eventually merge completely with overlying nimbostratus clouds.
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| 8. | However, an advancing nimbostratus cloud could have a diffuse precipitation leading edge.
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| 9. | Nimbostratus and cumulonimbus clouds are rain clouds and are usually darker than other clouds.
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| 10. | Frontal precipitation typically falls out of nimbostratus clouds.
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