Look up! Circumhorizontal arc!
In recent years, I think I look at the sky more often than I used to. Have seen some interesting things, such as a strange equilateral triangle cloud, iridescent clouds, numerous parhelions. This time my husband was with me and had his camera. Wikipedia helped me determine that others know this phenomenon as a circumhorizontal arc. https://en.wikipedia.org/wiki/Circumhorizontal_arc