it has nothing to do with fire and isn't technically a rainbow. Scientifically known as a circumhorizontal arc, the optical phenomenon occurs when sunlight refracts through plate-shaped ice crystals, according to weather.com. The Sun must also be at least 58 degrees above the horizon in order for the fire rainbow to be visible.
"To produce the rainbow colors, the sun's rays must enter the ice crys...tals at a precise angle to give the prism effect of the color spectrum," meteorologist Justin Lock told local news station WYFF. "Again, it has to do with getting the precise angle."
Becuase such a specific angle is necessary for the fire rainbow to be visible, the phenomenon is most common at middle latitudes.
A strange, rainbow-like cloud was painted across the sky over Isle of Palms, South Carolina earlier this week.
discovery.com
You’ve never seen clouds like this before (Looks like "Angel" Rainbow to me!
Over the weekend, residents of South Carolina's Isle of Palms were treated to a rare and special sight: A fire rainbow. While it may sound a little sinister, the phenomenon is nothing short of incredible. And fortunately, plenty of people had their phones...
hellogiggles.com
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