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Altostratus (As) These layered clouds consisting mostly of liquid water are gray to pale blue in appearance. These clouds form when the middle layers of the atmosphere are moist and gradually lifted. The cloud base does not have much structure.
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mapmaker.meteor.wisc.edu/~jbrunner/ackerman/sm-clouds/c...
mapmaker.meteor.wisc.edu/~jbrunner/ackerman/sm-clouds/cloudbkgrnd.html
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Altostratus Clouds form at warm fronts and is the result of condensation when warm moist is lifted above cooler air. When it is sufficiently thick Altostratus can produce rain or snow over a very large area.
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ezinearticles.com/?Altostratus-Clouds&id=1756309
ezinearticles.com/?Altostratus-Clouds&id=1756309
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Altostratus belong to the Middle Cloud group (2000-7000m up). An altostratus cloud usually covers the whole sky and has a gray or blue-gray appearance. The sun or moon may shine through an altostratus cloud, but will appear watery or fuzzy. ... How Clouds Form...
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www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds...
www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds/altostratus.html
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Young Naturalist, Discovering Nature, Earth Sciences, Clouds ... ALTOSTRATUS clouds form in grayish fibrous sheets, or may present a smoother appearance. Occasionally they are so thin you can see a dim outline of the sun or moon through them; however, the sun does not shine through enough to cast a shadow.
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www.tpwd.state.tx.us/publications/nonpwdpubs/young_natu...
www.tpwd.state.tx.us/publications/nonpwdpubs/young_naturalist/earth_sciences/clouds/index.phtml
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What alttitude do altostratus clouds form at? How high off the ground are altostratus clouds? How high are altostratus clouds from the ground? At what altitude would you find altostra clouds? At what altitude does an altostratus cloud form?
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wiki.answers.com/Q/At_what_altitude_would_you_find_alto...
wiki.answers.com/Q/At_what_altitude_would_you_find_altostratus_clouds
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Altostratus clouds are named because they are middle height clouds ("alto") and are spread out, thin, and layered ("stratus"). Sunlight is often visible through these clouds as in this picture. Altostratus clouds form when a front of warm, moist air meets a body of cold, dry air.
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chalk.richmond.edu/education/projects/webunits/weather/...
chalk.richmond.edu/education/projects/webunits/weather/altostratus.html
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USATODAY.com Latest News ... Altostratus clouds usually form ahead of a storm producing widespread and mostly continuous precipitation. Altostratus clouds do not allow enough sunlight to break through the cloud to form any shadows on the ground.
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www.usatoday.com/weather/wstratus.htm
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Altocumulus clouds usually form by convection in an unstable layer aloft, which may result from the gradual lifting of air in advance of a cold front. The presence of altocumulus clouds on a warm and humid summer morning is commonly followed by thunderstorms later in the day. ... Also found at mid-levels are altostratus clouds,
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ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/cldtyp/mdl/al...
ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/cldtyp/mdl/altcu.rxml
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Altostratus clouds belong to the Middle Cloud group. An altostratus cloud usually covers the whole sky. The cloud looks gray or blue-gray. The sun or moon may shine through an altostratus cloud, but will look like a watery or fuzzy blob. ... How Clouds Form...
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www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds...
www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds/altostratus.html&edu=elem
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