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Name this cloud!

Name this cloud!

Forums › The Cloud Forum › Name this cloud!

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    • March 26, 2017 at 4:36 pm #201972
      Dr. Robert Williams avatarDr. Robert Williams
      Participant

      On a drive in Colorado, came across this unusual cloud in a sky with very few other clouds.  What do I call it?P3043296r About 3 and a half minutes later I caught it again, looking almost corkscrew-like!P3043298c

       

    • March 27, 2017 at 10:44 am #202107
      Hans Stocker avatarHans Stocker
      Participant

      Well, this spiral cloud is certainly peculiar. I am just guessing but it might be contrail. The combination of winds or lack of winds with induced vortices by the airplane – as in the case of  the vortex Crow instability – might give this spiral appearance.

      Nice pictures anyway, especially the first one.

    • March 27, 2017 at 11:18 pm #202201
      Howard Brown avatarHoward Brown
      Participant

      Hi, Williams, and welcome. I would go along with Hans. Anything essentially linear in the sky tends to be a contrail; thereafter it can continue to degrade and become the mother of other forms.

      Since we have come back to vortices:
      http://www.thetimes.co.uk/article/private-jet-flipped-in-superjumbo-s-wake-bgr2s5blc

      N.B. Some comments following the link are critical

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