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Pmdb
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« on: April 06, 2008, 10:58:16 AM »

 Angel Angel


Mammatus clouds or "breast-clouds", are fascinating formations in the sky, made mostly from the cumulus cloud base. Although they are not a sign that a tornado is about to form, they often accompany tornado-producing storms, or even may be direct byproduct of tornado activity - an aftermath of severe thunderstorms.The name "mammatus" is derived from the Latin mamma (breast), due to the resemblance between the shape of these clouds and human female breasts.
 











 Shocked Shocked


Lenticular clouds

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.
Where stable moist air flows over a mountain or a range of mountains, a series of large-scale standing waves may form on the downwind side. Lenticular clouds sometimes form at the crests of these waves. Under certain conditions, long strings of lenticular clouds can form, creating a formation known as a wave cloud.
Power pilots tend to avoid flying near lenticular clouds because of the turbulence of the rotor systems that accompany them, but sailplane pilots actively seek them out.
Lenticular clouds have been mistaken for UFOs (or "visual cover" for UFOs) because these clouds have a characteristic lens appearance and smooth saucer-like shape.











« Last Edit: April 07, 2008, 07:29:00 AM by Pmdb » Logged

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« Reply #1 on: April 07, 2008, 09:04:11 AM »

Baie baie interessant, Pmdb. Dankie
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« Reply #2 on: April 07, 2008, 09:34:29 AM »

Weird, maar baie interressant. Dankie Wink
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« Reply #3 on: April 07, 2008, 02:03:55 PM »



 

Dis pragtige wolke die..
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