#4 a little bit about the clouds

Cirrostratus clouds are transparent, whitish clouds that veil or cover nearly the entire sky. A dead giveaway to distinguishing cirrostratus is to look for a "halo" (a ring or circle of light) around the sun or moon. The halo is formed by the refraction of the light on the ice crystals in the clouds, similarly to how sundogs form but in an entire circle rather than just on either side of the sun.

When You'll See Them

Cirrostratus indicate that a large amount of moisture is present in the upper atmosphere. They're also generally associated with approaching warm fronts.

https://www.thoughtco.com/types-of-clouds-recognize-in-the-sky-4025569