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This was taken about November 18 in southern Arizona, USA. I’ve never seen any clouds like this before. Is it natural or caused by some airplane?

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Thom Blair III
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    looks like kelvin helmholtz wave. This kind of cloud has been identified on this site. You need to check. I canot answer at the moment because i am using a mobile device to commuinicate –  Nov 21 '19 at 03:18
  • Here you go - https://en.wikipedia.org/wiki/Kelvin%E2%80%93Helmholtz_instability#/media/File:Wavecloudsduval.jpg and read this great answer - https://earthscience.stackexchange.com/questions/10004/what-might-cause-these-wave-clouds-near-the-horizon-could-it-be-gravity-waves/15801#15801 –  Nov 21 '19 at 04:35
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    Thank you! I appreciate it. – Thom Blair III Nov 21 '19 at 17:21

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