Anyone who works with a cloudspotter needs to forgive the occasional delayed appointment. Rowena Coutts (Member 28,177) was stopped in her tracks by a dramatic circumhorizon arc above Bentleigh East, Melbourne, Australia. This optical effect appears as a completely flat horizontal band of bright rainbow hues low in the sky. It is caused by light bending, or refracting, as it shines through the ice crystals of high clouds like Rowena’s Cirrus. In a location like Melbourne, a circumhorizon arc can only form in the months from just before to just after summer because the optics only work when the Sun is able to climb very high in the sky. ‘I had to text my client to say I was running late,’ Rowena laughed, ‘because I got distracted by a cloud.’