Top
- three possibilities:
a)
Altocumulus
in two or more layers, not increasing
b) Altocumulus opacus in a single layer, not increasing
c) Altocumulus, together with
Altostratus
or
Nimbostratus
in this picture
Altocumulus
at different levels
in this picture sheet of
Altocumulus
Opacus
(right half of the photo)
in this picture
Altostratus
with near the horizon elongated elements of
Altocumulus
in this picture lines of
Altocumulus
in the distance and thin
Altostratus
overhead
from the top downward:
photo by R.K. Pilsbury
photo by T. Bergeron
photo by A.J. Aalders
photo by R.K. Pilsbury (Crown copyright)
