Early in the morning over our city, I and other residents of my city saw an unusual phenomenon in the sky. At least the last 30 years this has not been exactly.
later weather forecasters described this phenomenon as rainbow glow of clouds. Rarely rare. High clouds are highlighted by the rising sun, which is not yet visible. So highlights and mountains. In this case, light is refracted in droplets of water or snow in these clouds, and the light decomposes into a spectrum, as in a rainbow. Different wavelengths are differently refracted, so red rays come into one's eye from one point, and on the other, for example, green.