NationMaster - Encyclopedia: Altostratus cloud

Altostratus is a cloud belonging to a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus. You can usually see the sun shining through them, and frequently cover the whole sky. Compare also with lower altitude stratus clouds. // High-level clouds Cirrus Clouds (from above) Abbreviation: Ci Cirrus clouds form above 16,500 feet (5,000 m), in the cold region of the troposphere. ... This article is about the unit of length. ... A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ... For other uses, see Cloud (disambiguation). ... // High-level clouds Cirrus Clouds (from above) Abbreviation: Ci Cirrus clouds form above 16,500 feet (5,000 m), in the cold region of the troposphere. ... For other uses, see Cloud (disambiguation). ... A lighter is a portable device used to create a flame. ... Nimbostratus has very few features. ... Darker is an album of C-Tec originally released in 1997. ... Cirrostratus showing an extremely large halo. ... For other uses, see Stratus. ...

Altostratus is caused by a large air mass that is lifted then condensed, usually by an incoming frontal system and can be found over wide-spread areas. Altostratus clouds are potentially dangerous, because they can cause ice accretion on aircraft. Their altitude is from 6,500-20,000 feet. They are made of ice crystals. In meteorology, an air mass is a large volume of air having fairly uniform characteristics of temperature, atmospheric pressure, and water vapor content. ... Look up condensation in Wiktionary, the free dictionary. ... The effect of atmospheric icing on a tree. ... Flying machine redirects here. ...

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Image File history File links Commons-logo. ... For other uses, see Cloud (disambiguation). ... This article or section does not adequately cite its references or sources. ... Cirrus uncinus is a type of cirrus cloud. ... A KHI on the planet Saturn, formed at the interaction of two bands of the planets atmosphere A KH instability rendered visible by clouds over Mount Duval in Australia Kelvinâ€“Helmholtz instability can occur when velocity shear is present within a continuous fluid or when there is sufficient velocity... Cirrostratus showing an extremely large halo. ... A cirrocumulus is a high-altitude cloud, usually occurring at 20,000-40,000 ft (6,000-12,000 m). ... Cumulonimbus with Pileus Pileus on a Cumulus cloud A pileus (Latin for cap) is a small, horizontal cloud that can appear above a cumulus or cumulonimbus cloud, giving the parent cloud a characteristic hoodlike appearance. ... Contrails are condensation trails (sometimes vapour trails): artificial cirrus clouds made by the exhaust of aircraft engines or wingtip vortices which precipitate a stream of tiny ice crystals in moist, frigid upper air. ... Image provided by Simon Eugster The altostratus undulatus is a type of low altocumulus cloud with signature undulations within it. ... ... The altocumulus undulatus is a mid-level cloud (about 8000 - 20,000 ft or 2400 - 6100 m), usually white or grey with layers or patches containing undulations that resemble waves or ripples in water. ... A mackerel sky is an indicator of moisture (the cloud) and instability (the cumulus form) at intermediate levels (2400-6100 m, 8000-20,000 ft). ... Altocumulus Castellanus is a family B type cloud. ... Lenticular clouds, technically known as altocumulus standing lenticularis, are stationary lens-shaped clouds that form at high altitudes, normally aligned at right-angles to the wind direction. ... For other uses, see Fog (disambiguation). ... For other uses, see Stratus. ... Nimbostratus has very few features. ... Cumulus humilis is what is commonly referred to as fair weather cumulus. In hot countries and over mountainous terrain these clouds occur at up to 6000 meters altitude, though elsewhere they are typically found lower. ... Cumulus mediocris is a cloud form of the cumulus family, slightly larger in vertical development than Cumulus humilis. ... A stratocumulus cloud belongs to a class characterized by large dark, rounded masses, usually in groups, lines, or waves, the individual elements being larger than those in altocumuli, and the whole being at a lower altitude, usually below 2,400 m (8,000 ft). ... An arcus cloud is a low, horizontal cloud formation associated with the leading edge of thunderstorm outflow (i. ... Cumulonimbus (Cb) is a type of cloud that is tall, dense, and involved in thunderstorms and other intense weather. ... A cumulonimbus incus cloud has a characteristic anvil-top shape. ... Cumulonimbus calvus is an moderately tall cumulonimbus cloud which is capable of precipitation, but has not yet reached the height where it forms into a cumulonimbus incus (anvil-top). ... Mammatus (also known as mamma or mammatocumulus, meaning breast-cloud) is a meteorological term applied to a cellular pattern of pouches hanging underneath the base of a cloud. ... Cumulus congestus clouds are characteristic of unstable areas of the atmosphere which are undergoing convection. ... Cumulus castellanus (from Latin castellanus, castle) is a type of cumulus cloud that is distinctive because it displays multiple towers arising from its top, indicating significant vertical air movement. ... Pyrocumulus, or fire cumulus, is a dense cumuliform cloud usually found at an altitude of 1500 m. ... The pyrocumulonimbus (pyroCb) is a type of cloud formed above a source of heat such as a wildfire or industrial plant. ... Noctilucent clouds (also known as polar mesospheric clouds) are rare bright cloudlike atmospheric phenomena visible in a deep twilight (the name means roughly night shining). They are most commonly observed in the summer months at latitudes between 50Â° and 60Â° (north and south). ... Polar stratospheric clouds (PSCs), also known as nacreous clouds, are clouds in the winter polar stratosphere at altitudes of 15,000â€“25,000 metres (50,000â€“80,000 ft). ...

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