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Mini Unit Weather III

Mini Unit Weather III. High Level Clouds. Cirrus Clouds Occur during fair weather Point the direction of air movement at the elevation the cloud is located at (usually at 20,000 feet). Cirrostratus Clouds Thicken as a warm front moves in Composed of ice crystals and generally transparent

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Mini Unit Weather III

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  1. Mini Unit Weather III

  2. High Level Clouds • Cirrus Clouds • Occur during fair weather • Point the direction of air movement at the elevation the cloud is located at (usually at 20,000 feet) • Cirrostratus Clouds • Thicken as a warm front moves in • Composed of ice crystals and generally transparent • -Reflections off the ice crystals forming a “halo” around the sun Image taken from: http://mayang.com/textures/Nature/html/Clouds/index.html Image taken from: http://www.flashcardmachine.com/cloud-names-andpictures.html Image taken from: http://media.photobucket.com/image/cirrostratus%20clouds/watertiger/450WEATHER_SUN_DOG_WHSE101_55819002.jpg Image taken from: http://www.freewebs.com/thomp730/weather.htm

  3. Mid-Level Clouds • Altocumulus Clouds • May look like parallel bands or rounded masses • Usually form by convection • Usually indicate a thunder storm later on in the day on a warm and humid summer morning • Altostratus Clouds • Usually cover the whole sky • Blue-gray appearance • Sun and moon appear fuzzy through these clouds • Form ahead of storms with continuous rain or snow Image taken from: http://www.answers.com/topic/altostratus-cloud-1 Image taken from: http://www.uen.org/weather/clouds/altoc2.shtml Image taken from: http://www.panoramio.com/photo/5302238 Image taken from: http://library.thinkquest.org/26804/systems/clouds.html

  4. Low-Level Clouds • Nimbostratus Clouds • dark in appearance • Bring light precipitation • Mostly made up of water droplets • Bases lie below 6,500 feet • Stratocumulus • Dark gray or light gray in appearance • Rounded masses • Sometimes bring very light precipitation Image taken from: http://207.45.186.82/%7Emdelfs/iphone/clouds/index.html Image taken from: http://facstaff.bloomu.edu/jcollins/Boutique.htm Image taken from: http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds/cloud_il.html&edu=high Image taken from: http://pro.corbis.com/search/Enlargement.aspx?CID=isg&mediauid=F2896174-9345-477A-BF7C-11E86EE73F8B

  5. Vertically Developing Clouds • Fair Weather Cumulus Clouds • Look like floating cotton • Have flat bases and distinct outlines • Only show slight vertical growth • Only last 5-40 minutes • Pushed by thermals (air bubbles) • Can develop into cumulonimbus clouds and produce large thunderstorms • Cumulonimbus Clouds • Larger and more vertically developed than fair weather cumulus • Pushed by convective updrafts • Tops can reach 39,000 feet or higher • Can be associated with supercells Image taken from: http://www.totalgamerzone.com/forums/showthread.php?t=7872 Image taken from: http://www.centennialofflight.gov/2003FF/clues/index.html Image taken from: http://lifeabovetheclouds.blogspot.com/2008_08_01_archive.html Image taken from: http://earthsci.org/processes/weather/clouds/cloud.htm

  6. Other Types of Clouds • Contrail Clouds • Also known as condensation trail • Resembles the trail of a kite • Produced at high altitudes when water droplets freeze before they can evaporate • Billow Clouds • Formed from instability of air flows with vertical shear • -common name for this is Kelvin-Helmholtz instability • Appear as a row of horizontal eddies within the vertical shear image taken from: http://www.crystalinks.com/chemtrails.html Image taken from: http://weather.about.com/b/2008/05/19/what-is-a-kelvin-helmholtz-cloud.htm Image taken from: http://apollo.lsc.vsc.edu/classes/met130/notes/chapter5/contrails.html Image taken from: http://commons.wikimedia.org/wiki/File:Mammatus-clouds-Tulsa-1973.png Image taken from: http://www.mrs.org/s_mrs/doc.asp?CID=7146&DID=180059 • Mammatus Clouds • Appear pouch like • Formed in sinking air • Do not mean that a tornado will form, and usually come after a thunderstorm Image taken from: http://www.dphotojournal.com/mammatus-clouds-by-jorn-olsen/

  7. Orographic Clouds • Formed when air is lifted due to the earth’s topography • Pileus Clouds • Smooth appearance • “attaches” to mountain tops or cumulus towers Other Types of Clouds Image taken from: http://www.victoriaweather.ca/clouds.php?image=pileus Image taken from: http://www.flickr.com/photos/mountain_ear/67102448/ Image taken from: http://www.outdoorsmagic.com/news/article/mps/uan/5887 Image taken from: http://www.wildlandschool.net/curric/quiz/clouds/k.htm

  8. image taken from: http://www.crh.noaa.gov/arx/images/sprcell.gif Image taken from: http://www.srh.weather.gov/elp/swww/v8n1/Wxbul8.1.2.htm WHY is there and ANVIL top?? Which way does the ANVIL face as far as direction of storm? Which way are storms rotating in the echoes?

  9. Lightening and Step Leaders

  10. Precipitation

  11. Work Sited "Cloud Types:." WW2010 (the weather world 2010 project):. 05 May 2009 <http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/cldtyp/home.rxml>. "Altostratus Clouds." Windows to the Universe. 05 May 2009 <http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds/ altostratus.html>.

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