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Very rarely in the USA Northern Mid West, maybe once a year at most, I will see a very smooth, concave cloud floating over the sky that looks exactly like a lenticular cloud, and only a few minutes, it starts to dissipate. What would explain this phenomena?

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  • $\begingroup$ a photo or two would help strengthen your question $\endgroup$ – gansub Jun 27 '17 at 8:22
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    $\begingroup$ The en.wikipedia.org/wiki/Lenticular_cloud shows one expired reference to something that suggest that shear winds created by fronts might be the reason. $\endgroup$ – Communisty Jun 27 '17 at 11:50
  • $\begingroup$ There's definitely a lot of storm fronts in my area throughout the year, I've definitely seen a lot of weird and uniquely shaped clouds, but none as rare as the lenticular. $\endgroup$ – RayOfHope Jun 27 '17 at 18:24
  • $\begingroup$ Is there a lake in that direction, sometimes lakes can alter the winds around them. $\endgroup$ – John Jun 27 '17 at 23:46
  • $\begingroup$ Will develop an answer if I can find time. Mountain waves are anchored to a ridge but can excite a wave that extends hundreds of miles downwind. At the leaks of the wave anywhere along it where the moisture is right you can get clouds like you have seen. $\endgroup$ – casey Jun 28 '17 at 2:41

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