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Saturday, December 6, 2014
A fairly uncommon phenomenon is "Cloud Iridescence". I noticed this while watching my son-in-law, Brad, put up some Christmas lights on the roof of his house the day after Thanksgiving. The colors you see are a diffraction of the Sun's light passing through small water or ice droplets. Usually near the Sun, so I had to block the Sun with the roof top, otherwise the Sun's glare would overwhelm the effect. Brad was so intent on his chore that I don't think he was ever aware of the colorful site behind him.
Adjusting the image by reducing the highlights and increasing the detail in the shadows and reducing the exposure in software such as LightRoom brings out detail and color a bit better: