Circumzenithal Arc

August 16th, 2013 at 12:43 am by under Bill's Blog, Weather

circumhorizontal arc - Erin Wiseman-Parkin 8 4 13 Cutlerville   Check out this picture from Skywarn Storm Spotter Erin Wiseman-Parkin.  Click on the picture to enlarge.  Erin took this picture on August 4th in Cutlerville.   This is a wonderful picture of a circumzenithal arc, a variety of halo.  It’s not a rainbow (which you see when the sun is at your back).  With a circumzenithal arc, you are facing more towards the sun.  It’s in the shape of a smile or grin.  The red color (longest wavelength) is on the outside of the arc.  Sunlight (made of the 7 primary colors) is passing through the hexagon-shaped (6-sided) ice crystals of the cirrus clouds.  This picture is special because of the interaction with the ice crystals of the cirrus clouds, giving the shape of the bird or angel.   Here’s more pics. of circumzenithal arcs from google images.

4 Responses to “Circumzenithal Arc”

  1. Jack says:

    Wow, Angel’s Watching Over US!!!! Beautiful ERIN ! !! Bill, Did they use To Them SunDogs, See Here : Or are They Completely Different ?? Just wondering…. Stayin CUED. …..

    1. Cort S. says:

      Sun dogs are different from the circumzenithal arc, although they are caused by the same type of ice crystal according to this image:

      1. Jack says:

        Thanks, Cort !! ;-)

  2. Jack says:

    add… Call.*. ;-)

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