Feigle wrote in an email to FOX 8, “WOW, stunning! What is it??” According to NOAA SciJinks, similar to a rainbow, a rainbow cloud occurs when small water droplets or small ice crystals ...

They occur when the sun's rays interact with ice crystals or water droplets in the high-altitude clouds. That causes the light to diffract and scatter into a spectrum of the colors of the rainbow.

A 2012 satellite photo captured an unusual "double rainbow" glory appearing next to an unconnected chain of rare vortices in the clouds above Mexico's Guadalupe Island.