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Interesting cloud formation

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brianb
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« on: July 12, 2008, 09:09:10 pm »

Hi,

I took this sequence of images over a 10 minute period last summer. The cloud formation is unusual, does anyone know how the waves are created? It's not the usual lenticular cloud formation as it was moving fast, with the high level cirrus, not more or less stationary like a train of wave clouds would be.






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John9929
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« Reply #1 on: July 12, 2008, 09:43:00 pm »

Hi Brian,
Nice images, my knowledge of clouds is not as good as Martin's but to me they look very much like
Kelvin-Helmholtz wave clouds. I think they are quite rare. As to how they are formed, I think it's
something to do with winds moving in different directions. No doubt other's will comment.
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martinastro
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« Reply #2 on: July 12, 2008, 11:44:15 pm »

Hi Brian. Those are very nice images. I would go with what John suggested - a very good example of K-H clouds!

Here's some further information from wikipedia

http://en.wikipedia.org/wiki/Kelvin-Helmholtz_Instability
« Last Edit: July 12, 2008, 11:46:46 pm by martinastro » Report Spam   Logged

Les
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« Reply #3 on: July 13, 2008, 10:27:27 pm »

HI Brian,
Impressive. 8)Never seen or heard of these clouds before,well done in capturing them.
Regards Les.
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