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Topic: Cirrostratus

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	Cirrostratus Clouds: sheet-like and nearly transparent
		Cirrostratus are sheet-like, high-level clouds composed of ice crystals.
		Though cirrostratus can cover the entire sky and be up to several thousand feet thick, they are relatively transparent, as the sun or the moon can easily be seen through them.
		Cirrostratus clouds, however, tend to thicken as a warm front approaches, signifying an increased production of ice crystals.
	ww2010.atmos.uiuc.edu /(Gh)/wwhlpr/cirrostratus.rxml?hret=/guides/mtr/cld/cldtyp/home.rxml (119 words)

	Weather Pictures and Storm Chasing - Cirrostratus clouds
		Cirrostratus clouds are so thin that the sun and moon can be seen clearly through the cloud.
		Ice crystals in cirrostratus clouds bend the light rays from the sun or moon as they pass through the cloud, which forms the halo around the sun or moon.
		Thick cirrostratus clouds give the sky a bright white appearance and often signal precipitation within 24 hours, especially if they are followed by mid-level clouds.
	www.weatherpictures.nl /cirrostratus.html (158 words)

	Cirrostratus Clouds - 01/30/98
		Cirrostratus clouds are strato type clouds at the high level so they are composed of ice crystals.
		Ice crystals are hexagonal shaped so when sun or moonlight passes through the ice crystals of a cirrostratus cloud, the light is dispersed (much the same way as light is dispersed in a prism) in such a way that a familiar ring will form.
		Cirrostratus clouds are commonly an indication that a warm front is approaching.
	www.rain.org /campinternet/meteorology/cirrostratus.html (147 words)

	Gempa Jogja » Jogja Quake Info » Blog Archive » Awan Horizontal itu bernama Cirrostratus
		Pada kesempatan lain, awan Cirrostratus yang tebal memberi langit suatu penampilan putih cerah.
		Hal ini disebabkan oleh karakteristik awan Cirrostratus yang cenderung untuk menebal karena pengaruh arus udara panas.
		Hal ini disebabkan oleh awan Cirrostratus cenderung untuk bercampur dengan awan lain karena adanya pengaruh udara panas.
	helpjogja.net /gempa-jogja/2006/07/14/awan-horizontal-itu-bernama-cirrostratus.htm (1032 words)

	Definition of cirrostratus - Merriam-Webster Online Dictionary
		Learn more about "cirrostratus" and related topics at Britannica.com
		Find more about "cirrostratus" instantly with Live Search
		See a map of "cirrostratus" in the Visual Thesaurus
	www.m-w.com /cgi-bin/dictionary?book=Dictionary&va=cirrostratus (46 words)

	Cirrostratus Clouds
		The name cirrostratus means "curl" and "spread out" in Latin.
		Cirrostratus clouds from when cool, dry air meets warm, moist air.
		Cirrostratus clouds can often produce a halo around the Sun.
	oncampus.richmond.edu /academics/education/projects/webunits/weather/cirrostratus.html (48 words)

	Cirrostratus (Cs)
		Cirrostratus may occur in the form of a fibrous veil in which thin striations can be seen (Plates 51, 52, and 54), or it may resemble a nebulous veil (Plates 53 and 55).
		Cirrostratus is never thick enough to prevent objects on the ground from casting shadows, except when the sun is low.
		Halo phenomena are also observed in thin Cirrostratus (Plate 53) Sometimes the veil of Cirrostratus is so thin that the halo provides the only indication of its presence.
	www.mid-c.com /manmar/Cirrostr.htm (143 words)

	Air BP - Clouds - High Altitude Clouds (Site not responding. Last check: )
		In the first group are Cirrus, Cirrocumulus and Cirrostratus clouds which are generally found at altitudes between 25,000 and 40,000 feet.
		The white delicate filaments of Cirrus clouds are composed of ice crystals.
		Cirrostratus is composed of a layer of ice crystals and often develops from Cirrus.
	www.bp.com /managedlistingsection.do?categoryId=4503666&contentId=57754 (102 words)

	Met Office: CH7 Cirrostratus covering the whole sky
		Cirrostratus differs from haze, in that haze is opalescent or has a dirty yellowish to brownish colour.
		The cirrostratus in the middle photograph is thin and featureless.
		Any variations in the thickness of the cirrostratus are noticeable when the sun is low in the sky.
	www.metoffice.gov.uk /publications/clouds/ch7 (222 words)

	Marine Weather 101
		It can also be used with stratus (flat, layered) as in cirrostratus to indicate a high, flat or layered cloud.
		Cirrostratus are sheetlike, thin clouds that usually cover the entire sky.
		Cirrostratus clouds usually come 12-24 hours before a rain or snow storm.
	www.boatsafe.com /nauticalknowhow/weather1.htm (1011 words)

	Cirrostratus Cloud
		Cirrostratus may cover the sky as a continuous sheet with no features, but it often has a fibrous look.
		Also, if the sun or moon is surrounded by a halo, the cloud is almost certainly cirrostratus.
		It is worth watching cirrostratus, because it often signals changing weather.
	www.mmem.spschools.org /grade5science/weather/cirrostratus.html (136 words)

	Clouds
		Cirrostratus clouds belong to the High Cloud (5000-13000m) group.
		Sometimes, the sun or moon will appear to have a halo around it when in the presence of cirrostratus.
		Cirrostratus clouds usually come 12-24 hours before a
	www.windows.ucar.edu /tour/link=/earth/Atmosphere/clouds/cirrostratus.html (144 words)

	HIGH CLOUDS
		Cirrostratus presents a semi-transparent, whitish cloud veil of fibrous (hair-like) or smooth appearance, totally or partly covering the sky, and generally producing a halo appearance.
		The smallness of these crystals, their sparseness and the fact that cirrostratus has at most only a moderate depth, account for the semi-transparency of this cloud through which the outline of the sun is visible.
		Cirrostratus differs from altostratus by its thinness and by the fact that it may show a halo phenomena.
	www.met.tamu.edu /class/Metr304/Exer10dir/highclouds.html (422 words)

	USATODAY.com (Site not responding. Last check: )
		Cirrostratus clouds are so thin that the sun and moon can be seen clearly through the cloud.
		Ice crystals in cirrostratus clouds bend the light rays from the sun or moon as they pass through the cloud, which forms the halo around the sun or moon.
		Thick cirrostratus clouds give the sky a bright white appearance and often signal rain or snow within 24 hours, especially if they are followed by mid-level clouds.
	www.usatoday.com /weather/wcirrus.htm (304 words)

	The Weather Network · Glossary Index (Site not responding. Last check: )
		Cirrostratus clouds are widespread, thin clouds, which form above 57-hundred meters.
		Ice crystals in cirrostratus clouds bend the light rays as they pass through the cloud, forming a halo around the sun or moon.
		Thick cirrostratus clouds give the sky a bright white appearance and often signal rain or snow.
	www.theweathernetwork.com /inter/help/glossary/pages/cirrostratusclouds.htm (76 words)

	Atlas oblaků
		Cirrostratus je průsvitný bělavý závoj oblaků, vzhledu vláknitého nebo hladkého, který úplně nebo částečně zakrývá oblohu a dává vznik halovým jevům.
		Cirrostratus má všeobecně rozplývavý vzhled a nemá strukturu zrn, vln, brázd, výběžků, oblázků, valounů apod., což je charakteristické pro cirrocumulus a altocumulus.
		Cirrostratus se liší od zákalu tím, že zákal je opalescentní a mívá špinavé žluté nebo hnědavé zabarvení.
	www.mraky.astronomie.cz /cirrostratus.php (309 words)

	Cirrostratus (Site not responding. Last check: )
		A Cirrostratus is a cloud belonging to a class characterized by a composition of ice crystals and often by the production of halo phenomena.
		It appears as a whitish and usually somewhat fibrous veil, often covering the whole sky and sometimes so thin as to be hardly discernible.
		Compare cirrostratus with other stratus cloud formations at lower altitude: altostratus, nimbostratus, and low altitude stratus cloud s.
	www.serebella.com /encyclopedia/article-Cirrostratus.html (131 words)

	SDS Weatherwise Extras: Cloud Photos
		The ice crystals in "cirrostratus" formations are responsible for their "halo" effect around the sun or moon.
		Cirrostratus is a thin, translucent layer of high clouds composed of ice crystals.
		Unlike high cirrostratus clouds which are made up of ice crystals, midlle-altitude altostratus make the sun look like it is shining through ground glass but without a halo effect.
	www.discoverscience.rutgers.edu /extras/weatherwise/clouds.html (438 words)

	Clouds
		There are also seven variations of these basic cloud types that are commonly described: cirrostratus, cirrocumulus, altostratus, altocumulus, nimbostratus, stratocumulus, and cumulonimbus.
		Cirrostratus clouds are high, thin clouds that give the sky a milky-white appearance.
		Cirrocumulus are among the least common of the cloud types, forming most commonly as cirrus or cirrostratus clouds degenerate.
	members.tripod.com /eslstuff/clouds.htm (445 words)

	The cloud classification system (general)
		Cirrus and cirrostratus tend to move in the direction of the wind at that level which differ to that at the surface.
		Cirrus normally precede cirrostratus which are then followed by the anvil of the approaching thunderstorm.
		In fact, cirrus and cirrostratus in this case are the remnants downwind of the weakening anvil.
	australiasevereweather.com /techniques/moreadv/class.htm (5094 words)

	Clouds: page 1
		Cirrus clouds appear as wispy thin veils or detached filaments composed mostly of ice.
		Cirrostratus is a transparent, whitish veil of cloud that usually covers much of the sky.
		Cirrostratus clouds thicken and grade into altostratus clouds with the approach of a warm front.
	www.uwsp.edu /geo/faculty/ritter/geog101/textbook/atmospheric_moisture/clouds_1.html (318 words)

	Cloud types Summary
		High level clouds include cirrus, cirrostratus, and cirrocumulus clouds that occur at altitudes between 16,000 and 45,000 feet.
		Cirrostratus clouds, because they are thin and the ice crystals act to both reflect and refract sunlight, are often associated with halos of ice crystals that appear to encircle the Sun or Moon.
		Abbreviation: Cs Cirrostratus clouds are often translucent and do not bring precipitation.
	www.bookrags.com /Cloud_types (2040 words)

	High Cloud Classification
		Cirrus (often in bands converging towards one point or two opposite points of the horizon) and Cirrostratus, or Cirrostratus alone; in either case, they are progressively invading the sky, and generally growing deser as a whole, bu the continuous veil does not reach 45 degrees above the horizon.
		Cirrus (often in bands converging towards one point or two opposite points of the horizon) and Cirrostratus, or Cirrostratus alone; in either case, they are progressively invading the sky, and generally growing denser as a whole; the continuous veil extends more than 45 degrees above the horizon, withou the sky being totally covered.
		Cirrus, Cirrocumulus, and Cirrostratus invisible owing to darkness, fog, blowing, dust or sand or other similar phenomena, or more often because of the presence of a continuous layer of lower clouds.
	www.atmos.washington.edu /gcg/MG/tepps/SPOON/photoen/ch.code.html (362 words)

	How to be a Storm Spotter - Read the Clouds
		Cirros (high) or Cirro can be used with cumulus (heap, puffy) to indicate a cirrocumulus or high, puffy cloud.
		Alto can also be used with cumulus and stratus to indicate altocumulus and altostratus which are middle altitude puffy clouds and middle altitude flat or layered clouds respectively.
		Watch for cumulus (puffy) clouds that start to rapidly develop vertically (up) to become cumulonimbus thunderstorm clouds.
	www.boatsafe.com /kids/weather1.htm (1199 words)

	Southland WX - Every cloud has a silver lining part#3
		High altitude ice crystal clouds with very thing wispy appearance to them.
		Thick cirrostratus clouds are often a signal of precipitation within 24 hours...especially if they are followed by
		Cirrus clouds generally are seen during fair weather and point in the direction of air movement at their altitude.
	www.southlandwx.com /clouds3.html (122 words)

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