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Stratus clouds are low-level, grey, fog-like clouds that often encompass the entire sky. They are uniform, often forming low-hanging shelves which lead to overcast days with little to no precipitation. Stratus clouds do ... More »

www.reference.com Science Weather & Tides Clouds

Altocumulus clouds are midlevel clouds that often presage cold fronts in temperate climates. The bottoms of these clouds can be found around 6,500 to 13,000 feet in the polar regions, and up to 20,000 feet in the tropics... More »

www.reference.com Science Weather & Tides Clouds

Cumulonimbus clouds produce thunderstorms, blizzards, torrential rain, hailstorms and tornadoes. Though they have a low base, these clouds are very deep, and they can extend miles into the atmosphere. More »

www.reference.com Science Weather & Tides Clouds
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Stratus clouds are formed when an upward-moving current of air collides with a thinner layer of air above it, causing water drops to form. The name "stratus cloud" derives from the shape of the cloud formation, where the... More »

www.reference.com Science Weather & Tides Clouds

Cumulonimbus clouds are the tallest clouds in the sky, reaching well into the troposphere. Although the bottom of a cumulonimbus cloud contains water, the top of the cloud reaches so high that it contains ice crystals. More »

www.reference.com Science Weather & Tides Clouds

The main classification for clouds is based on their height above ground and they are categorized as high-level, mid-level and low-level.. Clouds are also identified by their appearance and can be named by combining the ... More »

www.reference.com Science Weather & Tides Clouds

There are 10 main types of clouds that are found in nature. These clouds are combinations of three different families; cirrus, cumulus and stratus clouds. More »

www.reference.com Science Weather & Tides Clouds