Was driving in a local neighborhood with family and my daughter pointed out a rainbow ahead of us that no one else could see. I had my husband stop the car for me to get out for a better picture. I’d seen others post about similar phenomena but after some research and discovering your June 2020 article, I have confirmed that this is indeed a circumhorizontal arc.

iPhone Xs max

Slightly increased exposure, brilliance, highlights, shadows, brightness, saturation, and vibrance using iPhone editing to bring out more blue in sky.