Explore Cirrus Cloud, Rainbow Cloud, and more!

The fire rainbow is the rarest of all naturally occurring phenomena. The clouds must be cirrus and at an altitude of 20,000 feet at least. There must be just the right amount of ice crystals present, as well.     The sun has to hit the clouds at exactly 58 degrees. It makes the rainbow appear to be on fire, hence the name. It’s actually cold as ice, though. In the weather world, the phenomena is known as a circumhorizontal arc.

IT'S A SONIC RAIN BOOM! Circumhorizon Arc (aka Fire Rainbow) - an ice halo formed by ice crystals located in cirrus clouds. Light passes through the hexagonal crystals and if seen at the right angle forms a rainbow cloud.

Circumzenithal Arc. Sometimes called "a smile in the sky." One of the brightest, most colorful halos. Similar in appearance to a rainbow but it is actually formed from sunlight refraction through horizontally-oriented ice crystals not raindrops.

Sometimes called "a smile in the sky." One of the brightest, most colorful halos. Similar in appearance to a rainbow but it is actually formed sunlight refraction through horizontally-oriented ice crystals not raindrops.

Fire rainbow

A rainbow is seen near a cloud south of Corvallis, Ore., Monday, May (Photo by Andy Cripe/AP Photo/The Corvallis Gazette-Times)

Photographer captures rare 'fire rainbow cloud' above Florida as Mother Nature puts on spectacular light show  Ken Rotberg spotted unusual phenomenon as sun dropped behind a storm cloud in the early evening   Rare sight also known as a 'circumhorizon arc'

Photographer captures rare 'fire rainbow cloud' above Florida as Mother Nature puts on spectacular light show

Photographer captures rare 'fire rainbow cloud' above Florida as Mother Nature puts on spectacular light show Ken Rotberg spotted unusual phenomenon as sun dropped behind a storm cloud in the early evening Rare sight also known as a 'circumhorizon arc'

Nacreous cloud, Mother of pearl cloud. Sweden. Photographer Marita Toftgard

NACREOUS cloud, Mother of pearl cloud, Sweden,--Photographer Marita Toftgard^

Explican raro “arcoíris de fuego” en Carolina del Sur

Explican raro “arcoíris de fuego” en Carolina del Sur

Beachgoers Snap Stunning Photos of Rare 'Fire Rainbow' in South Carolina Sky - ABC News

Angels around us!

angel cloud photo taken over West Palm Beach Florida. Looks more angel than cloud to me!

Fantastical Rainbow Clouds Dust the Skies at Sunset in the UK - My Modern Met

Fantastical Rainbow Clouds Dust the Skies at Sunset in the UK

Fire rainbows occur when sunlight and cloud ice particles align perfectly to create a prism that hangs beneath the sun and looks like a rain...

Rare fire rainbow streaks across 4th of July sky

a rare cloud phenomenon also called a circumhorizontal arc -- an ice halo formed by hexagonal, plate-shaped ice crystals in high level cirrus clouds

Das Phänomen, genannt "Sun Dog ein""," geschieht, wenn die Eiskristalle in den Wolken erscheinen und die Sonnenstrahlen brechen. ,

Photographer captures rare 'fire rainbow cloud' above Florida. Another spectacular light show. Ken Rotberg spotted unusual phenomenon as sun dropped behind a storm cloud in the early evening Rare sight also known as a 'circumhorizon arc'

Rare fire rainbow - Moray, Scotland #LandscapeFotography

Fire rainbow, Scotland - A circumhorizontal arc is an optical phenomenon - an ice-halo formed by plate-shaped ice crystals in high level cirrus clouds!

A pileus, also called scarf cloud or cap cloud, is a small, horizontal, altostratus cloud that can appear above a cumulus or cumulonimbus cloud, giving the parent cloud a characteristic "hoodlike" appearance. Pilei are formed by strong updraft at lower altitudes, acting upon moist air above, causing the air to cool to its dew point.

“A pileus, also called scarf cloud or cap cloud, is a small, horizontal, altostratus cloud that can appear above a.

Another summertime occurrence, fire rainbows appear when sunlight hits frozen ice crystals in high-altitude cirrus clouds. Because the fire rainbow actually involves no rain at all, scientists would rather we refer to this occurrence by its much less fun, but much more accurate title: the circumhorizonal arc.

15 weird natural phenomena [PICS]

Another summertime occurrence, fire rainbows appear when sunlight hits frozen ice crystals in high-altitude cirrus clouds.

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