Visibility II / V
It's been a sunny day for a long time, so we had to look at the sky in the hope of possible halos. No halos were visible, but after midday a single oblong and colorful nacreous cloud appeared above the sun. Before disappearing, the cloud was only visible for about twenty minutes, in the final phase a wavy structure, of the same type as in Kelvin-Helmholtz clouds, appeared at its left end.
The sky receded into a slightly more solid cloud, but around 3 p.m., pale, almost white mother-of-pearl streaks could be seen in the clearing sky.