Spectacular rare 'rainbow cloud' is captured on camera!!


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Categories: Nature

A woman was stunned to look up at the sky on holiday to see a spectacular 'rainbow cloud'. Beckie Bone. Dunning, from Belleville, Illinois, captured the rare sight on camera while visiting Ocho Rios in Jamaica. She posted it on The Weather Channel's Facebook page in search of finding out what it was.

WHAT IS A 'FIRE RAINBOW' AND HOW IT IS FORMED IN THE SKY?

The phenomenon was first dubbed a 'fire rainbow' back in 2006, when one was spotted by a Washington journalist and a strict set of conditions are required for such a thing appear in the sky.

Cloud iridescence only occur in high-level cirrus clouds, which usually form about 18,000ft. They appear thin and wispy and are made up of tiny ice crystals.

To produce the rainbow colours the sun's rays must enter the ice crystals at a precise angle to give the prism effect of the colour spectrum. 

The sun must also be at an altitude of at least 58 degrees above the horizon. 

The same sort of thing occurs when we see coloruful sunsets. In those instances, high-level cirrus clouds produce many colours due to the sun's low angle, meaning that we see reds, oranges and purples.

via DailyMail

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