'Rainbow cloud' appears in sky in Wilsonville - Hawaii News Now - KGMB and KHNL

'Rainbow cloud' appears in the sky over Wilsonville

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WILSONVILLE, OR (KPTV) -

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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