| The grey layer looks like and should be an altostratus although the fronts look different in the tropical regions. |
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| You were probably looking at the sun or moon through a layer of altostratus clouds. |
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| Where enough light shows through cirrostratus clouds to create shadows, it does not with altostratus. |
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| An altostratus cloud usually covers the whole sky and has a gray or blue-gray appearance. |
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| From the ground this altostratus looks white or slightly blue and watery. |
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| Altocumulus generally form about 6,500 feet to 20,000 feet above ground level, a similar level to altostratus formations. |
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| In the middle troposphere, stratiform clouds are known as altostratus. |
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| A weak trough in the upper atmosphere was generating broken layers of stratocumulus based at 2,000 feet and additional overcast layers of altostratus. |
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| An elevated portion of a frontal zone forces broad areas of lift, which form clouds decks such as altostratus or cirrostratus. |
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| A wispy altostratus cloud blocks light of the setting sun as seen from the summit of Mount Pisgah. |
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| Altostratus is higher than stratus but beware. |
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| Altostratus translucidus, cloud sheets formed by the rising and cooling of large air masses, often precede advancing storm systems. |
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