Pennsylvania, USA

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• • October 22, 2017 at 11:52 pm #236753
    Roger Samuels

    Participant

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  • October 25, 2017 at 11:04 pm #237227
    Howard Brown

    Participant

    Hey, hey, Roger, a great capture – I wish I could put a name to it. Any suggestions, anyone? My first thought was Prince of Wales’ Feathers. Then I thought it would make a nice mono for the Black and White thread. Then I thought it ought to be what is now called cavum (another new ICA name)
    http://us11.campaign-archive.com/?u=3b978e064761964547808bac4&id=990adaba10

    https://cloudatlas.wmo.int/search.html?keyword=cavum
    Or is it just simple virga?

    • October 26, 2017 at 11:35 pm #237422
      Howard Brown

      Participant

      The virga falling out of cavum seems to be white (supercooled perhaps and hence medium or above in height); Roger’s seems fairly low and there is no distinct hole..

  • November 5, 2017 at 9:54 pm #239050
    George Preoteasa

    Participant

    Looking at the cloud atlas,

    https://cloudatlas.wmo.int/cirrocumulus-may-form.html

    it says that persistent contrails can, over a period of time and under the influence of strong upper winds, transform into Cirrocumulus (Cc homomutatus). If you follow the link above and click on the “homomutatus” (which is a link in the cloud atlas) the picture points out some cirrus spissatus. Now, imagine what they would look like after sunset. I think that’s what you got there, Roger.

    • November 6, 2017 at 11:25 pm #239199
      Howard Brown

      Participant

      We live and learn, George – the new ICA has a neat feature; when I followed your link and clicked on spissatus the ICA highlighted the spissatus within a red rectangle.

      But cirrus spissatus just means optically thick cirrus and I don’t think Roger’s cloud is that high. I will stick with the simple virga.

  • November 6, 2017 at 12:10 pm #239118
    Roger Samuels

    Participant

    Interestingly enough it seems I catch more contrails than real clouds……..

  • November 7, 2017 at 12:16 pm #239274
    George Preoteasa

    Participant

    I think you are right, Hygge.

  • November 8, 2017 at 12:04 am #239362
    Howard Brown

    Participant

    Virga

    http://www.network54.com/Forum/385606/thread/1257028647

    If this works from the old forum, I snapped it over my house. Graham Davis, who defined it as virga, an occasional contributor to the new forum, is a retired UK Met Office professional who knows clouds.

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