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Ha, I think the Dutchman has found his lost goldmine within this thread. Great composition of impressive cloud structures, Michael.
I am dreaming that Turner would have liked the next one. It does well in B&W as well in “Not B&W” (just check).
At sunset
Hello Hygge, you make me curious about this survey concerning contrail. I have no idea what is was about or what purpose it had. I notice that this is the second time you come up with it. Like you I hope it will be answered, but “if not” it might be an idea to put forward the question directly via the info address of CAS? Does this help?
I think you are right Hygge. I tried to find something like it and found only one in the gallery that shows resemblance:
Something like it, but more spectacular
For comparison, unfortunately without the former fantastic halo, another moonscape like the one in the Black and White Thread (Vol I)
Thanks Graham for the link with information about the history and science of contrails and George for the link of the effects of the post 9/11 flight groundings.
Being from the 50’s one can say that the sky is changed since then, certainly in the neighborhood of air traffic. Just an example below made with the cloudspotter app.
Very nice those different patterns of undulatus and layers, Michael.
Together with the “holes eating the altocumulus” I spotted this one lately. A circular undulatus.
Someone Threw a Stone in the Pond
I read nice thoughts about rareness, but I like to add another aspect of the rareness of a cloud, i.e. the way the observed cloud or phenomenon appears. There can and will be very spectacular appearances of a rather common one that makes it a very rare occasion. Just check the gallery and you will find a lot of rare occasions of what might be called common clouds. You will whoop with joy Samuel, so welcome to you!
I do recognize the problem with signing in Michael. I have found that signing in and then immediately a refresh of the page will help. Just try. Another thing is that being not signed in the links to the gallery and the forum show the status of the site some 5 days (or now already maybe more) older. The team knows about it, so I hope they can solve it.
A horseshoe is indeed a weirdo the way you describe their coming and going Michael, very visual. I just once saw a horseshoe close enough. I took the picture quickly with the cloudspotter app (the phone is by hand) and after getting my camera it was gone with the winds. So no observations of the way it developed. Nevertheless. This one was very thin and rectangular.
Brains back, haha. I missed the joke the first time I saw your post Keelin.
Beautiful bouquet Michael!
A lot going on on your picture George. The contrail shows indeed Crow instability effects. I do see a lot of contrail where I am living, so this is sometimes observed, but to see it in its most characteristic appearance it needs the right conditions. This is something else I spotted last week.
A moonscape
And some place further in the sky:
Holy cow. Holes were eating up the altocumulus.
Has anyone seen something like this before?
Ah, brain teasing it was. Many thanks Gavin and others for solving !
Another contrail with Crow instability giving something like a zipper
Well thank you too Keelin. As a matter of fact I do the same. If there is something new it is fun finding out more about it.
And OOPS that is not your brain to blaim. I do think something is wrong with the upload function. From what I experience today is that the forum seems to be under construction. I already tried earlier to post a picture, but did not succeed. I wait untill it is solved…
