Print Friendly and PDF

Altocumulus castellanus (Ac cas) - CCH 1953


Cumuliform turrets rising vertically from cloud elements connected by a common horizontal base. The turrets:

  • Seem to be arranged in lines
  • Give the cloud a crenelated (castle battlement) appearance
  • Are sometimes taller than they are wide
  • Are especially evident when the cloud is seen from the side

Altocumulus castellanus is an indicator of instability at that level; when it acquires considerable vertical extent, it is classified as:


Share this page