Did you see a strange rainbow-like cloud in the sky on Friday?
You weren't alone.
A number of FOX 12 viewers shared their photos of the rainbow cloud. Most of the reports centered in the Wilsonville area.
PHOTOS: Rainbow cloud in Wilsonville
FOX 12 meteorologist Stephanie Kralevich said it's a fragment of a circumhorizontal arc, which is an optical phenomenon formed by plate-shaped ice crystals in high cirrus clouds.
The clouds are common this time of year when the sun is high in the sky and high, thin clouds move by.
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