Author Topic: Scary Clouds  (Read 4304 times)

islander

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Scary Clouds
« on: August 04, 2015, 04:16:53 PM »


One of the rarest weather phenomena, Mammatus Clouds. Photo taken by John C. Olsen in Hastings, NE


What Are Mammatus Clouds?

Mammatus are pouch-like cloud structures. They're also a rare example of clouds in sinking air-- most clouds form in rising air. Although mammatus most frequently form on the underside of a cumulonimbus, they can develop underneath cirrocumulus, altostratus, altocumulus and stratocumulus.

For a mammatus to form, the sinking air must be cooler than the air around it and have high liquid water or ice content. They derive their name from their appearance, like the bag-like sacs that hang beneath the cloud resemble cow's udders.

Mammatus are long-lived if the sinking air contains large drops and snow crystals since larger particles require greater amounts of energy for evaporation to occur. Over time, the cloud droplets do eventually evaporate and the mammatus dissolve.

Despite popular misconception, mammatus clouds are not a sign that a tornado is about to form. While associated with thunderstorms, mammatus clouds are not necessarily an indicator of severe weather. Mammatus result from the sinking of moist air into dry air. They are in essence upside-down clouds. The sharp boundary of mammatus is much like the sharp boundary of a rising cumulonimbus cloud before an anvil has formed.

Source: NOAA
http://www.accuweather.com/

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islander

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Re: Scary Clouds
« Reply #1 on: August 04, 2015, 04:56:24 PM »


Undulatus asperatus

Undulatus asperatus (or alternately, asperitas) is a cloud formation, proposed in 2009 as a separate cloud classification by the founder of the Cloud Appreciation Society. If successful it will be the first cloud formation added since cirrus intortus in 1951 to the International Cloud Atlas of the World Meteorological Organization.

The name translates approximately as "roughened or agitated waves".

The ominous-looking clouds have been particularly common in the Plains states of the United States, often during the morning or midday hours following convective thunderstorm activity. (wikipedia)

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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islander

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Re: Scary Clouds
« Reply #2 on: August 04, 2015, 05:09:16 PM »


A Morning Glory cloud formation between Burketown and Normanton, Australia.

The Morning Glory cloud is a rare meteorological phenomenon consisting of a low-level atmospheric solitary wave and associated cloud, occasionally observed in different locations around the world. The wave often occurs as an amplitude-ordered series of waves forming bands of roll clouds.

The southern part of the Gulf of Carpentaria in Northern Australia is the only known location where it can be predicted and observed on a more or less regular basis due to the configuration of land and sea in the area. (wikipedia)

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #3 on: August 04, 2015, 05:18:19 PM »


Lenticular clouds hover over Mount Erebus volcano in McMurdo Sound
where massive icebergs from the Ross Ice Shelf are clogging the sea in Antarctica.  (US Coast Guard photo)

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #4 on: August 04, 2015, 05:18:57 PM »


Credit & © J D Rufo, J Koermer, Plymouth State College
A lenticular cloud over New Hampshire

Why does this cloud look so strange?  Actually, pictured above are several clouds all stacked up into one striking lenticular cloud.  Normally, air moves much more horizontally than it does vertically.  Sometimes, however, such as when wind comes off of a mountain or a hill, relatively strong vertical oscillations take place as the air stabilizes.  The dry air at the top of an oscillation may be quite stratified in moisture content, and hence forms clouds at each layer where the air saturates with moisture.  The result can be a lenticular cloud with a strongly layered appearance.  The above picture was taken in 1999 over Plymouth, New Hampshire, USA.

Source: antwrp.gsfc.nasa.gov and http://flatrock.org.nz/

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #5 on: August 04, 2015, 05:30:06 PM »
Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #6 on: August 04, 2015, 05:32:53 PM »
Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #7 on: August 04, 2015, 05:35:51 PM »


Fallstreak hole -altocumulus stratiformis translucidus lacunosus

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #8 on: August 04, 2015, 05:37:36 PM »
Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #9 on: August 04, 2015, 05:41:25 PM »


Cumulonimbus calvus

cloud follows the tree's form, or is it the other way around?


additional cloud formations in this forum, at http://tubagbohol.mikeligalig.com/image/rare-cloud-formations/

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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hubag bohol

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Re: Scary Clouds
« Reply #10 on: August 04, 2015, 08:55:30 PM »
Childish. Here's the real scary one...





:P

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Re: Scary Clouds
« Reply #11 on: August 06, 2015, 10:12:48 AM »

more childish.  you think that scares me?

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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Re: Scary Clouds
« Reply #12 on: August 06, 2015, 10:14:31 AM »
Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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hubag bohol

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Re: Scary Clouds
« Reply #13 on: August 06, 2015, 06:17:26 PM »
more childish.  you think that scares me?

Diay ba? Kini, hadlok jud ka...




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Re: Scary Clouds
« Reply #14 on: October 10, 2015, 02:01:23 PM »
...than to speak out and remove all doubt." - Abraham Lincoln

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Re: Scary Clouds
« Reply #15 on: October 10, 2015, 05:06:51 PM »
Diay ba? Kini, hadlok jud ka...




sayang di ko makakita...

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Republic Act 8485 (Animal Welfare Act of 1998, Philippines), as amended and strengthened by House  Bill 6893 of 2013--- violation means a maximum of P250,000 fine with a corresponding three-year jail term and a minimum of P30,000 fine and six months imprisonment

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hubag bohol

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Re: Scary Clouds
« Reply #16 on: October 10, 2015, 10:51:34 PM »
Oops. Gi-withdraw galing sa website kay bisan sila gihubaghubagan sa kahadlok...


;D

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