This is a photograph of nimbostratus clouds and a rainbow in Seattle, WA. Can you see the rain falling from the clouds?
Click on image for full size
Courtesy of Peggy LeMone
Nimbostratus
Nimbostratus (weather symbol - Ns) clouds are composed of water droplets and
belong to the Low Cloud (surface to 2000m up) group. They are dark gray with a
ragged base. Nimbostratus clouds are associated with continuous rain or snow. Sometimes they cover the whole sky and you can't see the edges of the cloud.
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The low cloud group consists of Stratus, Stratocumulus, and Nimbostratus clouds. Low clouds consist of water droplets. The base of a low cloud is from the surface to 2000m.
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Altocumulus clouds (weather symbol - Ac), are made primarily of liquid water and have a thickness of 1 km. They are part of the Middle Cloud group (2000-7000m up). They are grayish-white with one part
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Cirrocumulus clouds (weather symbol - Cc) are composed primarily of ice crystals and belong to the High Cloud group (5000-13000m). They are small rounded puffs that usually appear in long rows. Cirrocumulus
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