clouds mrs. kotchounian 2013
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Clouds Mrs. Kotchounian 2013. High Level Clouds. form above 6,000 meters primarily composed of ice crystals. thin and white in appearance. Cirrus Clouds. Thin and wispy Generally occur in fair and pleasant weather Signal upcoming change in weather (cold front or Low Pressure) - PowerPoint PPT PresentationTRANSCRIPT
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CloudsMrs. Kotchounian
2013
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High Level Clouds
• form above 6,000 meters• primarily composed of ice crystals.
• thin and white in appearance.
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Cirrus Clouds
• Thin and wispy• Generally occur in fair and pleasant weather
•Signal upcoming change in weather (cold front or Low Pressure)
•Point in the direction of air movement at their elevation
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Cirrocumulus Clouds
• Small, round white puffs• ripple effect• said to resemble the scales of a fish
•Normally associated with fair weather
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Cirrostratus Clouds
• “sheet-like”• can cover the entire sky, but are nearly transparent
•Can see the sun and/or moon through them
•Associated with fair weather•Can be a signal of upcoming change in the weather
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Mid-Level Clouds
• form between 2,000 and 6,000 meters above sea level
•Composed primarily of water droplets
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Altocumulus Clouds
• may look like parallel bands or rounded masses
•A portion of them is usually shaded or grey in color
•May be a signal that a cold front is approaching
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Altostratus Clouds
• Grey or bluish-grey in color• usually cover the entire sky• commonly form ahead of storms that will produce steady precipitation
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Low-Level Clouds
• composed mainly of water droplets
•Found below 2,000 meters
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Stratus
• Gray• flat, uniform in appearance• cover entire sky• generally no precipitation, although some drizzle may occur
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Nimbostratus Clouds
• dark• light to moderate steady precipitation
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Stratocumulus Clouds
• dark to light grey• light precipitation• lumpy layers with some breaks in between
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Stratocumulus Clouds
These are similar in appearance to altocumulus and are often mistaken for such. A simple test to distinguish these is to compare the size of individual masses or rolls: when pointing your hand in the direction of the cloud, if the cloud is about the size of your thumb, it is altocumulus; if it is the size of your entire hand, it is stratocumulus.
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Clouds with Vertical Development
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Cumulus
• Cottonball appearance• may appear between 5-40 minutes
• flat bases• slight vertical growth
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Cumulonimbus
• significant vertical development
•Produce thunderstorms•Dark bases
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