Viewers in western Wisconsin today observed a unique atmospheric phenomenon: a circumhorizontal arc! Casually called a 'fire rainbow,' it occurs in summer-time as the sun must be high in the sky, at ...

While it does not happen every day, it is a well-known occurrence. The phenomenon spotted is known as a circumhorizontal arc, and they occur on sunny days when there are cirrus clouds present. Cirrus ...

Gallineau said she and her kids saw it on Sunday around 12:45 p.m. in Wendell Falls. This is called a 'circumhorizontal arc.' According to the International Cloud Atlas, this forms when the sun is at ...

KNOXVILLE (WATE) – Did you happen to notice a strange, horizontal-looking rainbow cloud in the sky on Monday? Many people contacted the WATE 6 On Your Side Storm Team asking about it. It looked like a ...

The rare phenomenon sees the sun and clouds combine to create a colourful ball in the sky THE rare phenomenon of a fire rainbow has been captured a handful of times on camera. It is a burst of colour ...

GREENSBORO, NC -- It might look like rainbow and you might have even heard it called a fire rainbow, but what some people saw in the sky last Friday was a circumhorizontal arc. A rare sighting that ...

MONTGOMERY, Ala. (WSFA) - If you saw what looks like a rainbow on clouds Tuesday afternoon, you were looking a rare optical phenomenon called a circumhorizontal arc. Yes, that’s a very real and ...

It's always nice to receive photos of weather phenomena, interesting clouds, and optical effects from people in the community, and to identify the type of phenomena and the processes behind it. On ...

Bryan Nelson is a science writer and award-winning documentary filmmaker with over a decade of experience covering technology, astronomy, medicine, animals, and more. Have you ever seen this optical ...