| Code figure | Technical specifications |
Code figure | Non-technical specifications |
| 0 |
No CL clouds
|
0 |
No Stratocumulus, Stratus, Cumulus or Cumulonimbus
|
| 1 |
Cumulus humilis or Cumulus fractus other than of bad weather,* or both
|
1 |
Cumulus with little vertical extent and seemingly flattened, or ragged Cumulus other than of bad
weather,* or both
|
| 2 |
Cumulus mediocris or congestus, with or without Cumulus of species fractus or humilis or Stratocumulus,
all having their bases at the same level
|
2 |
Cumulus of moderate or strong vertical extent, generally with protuberances in the form of domes or towers,
either accompanied or not by other Cumulus or by Stratocumulus, all having their bases at the same level
|
| 3 |
Cumulonimbus calvus, with or without Cumulus, Stratocumulus or Stratus
|
3 |
Cumulonimbus the summits of which, at least partially, lack sharp outlines, but are neither clearly
fibrous (cirriform) nor in the form of an anvil; Cumulus, Stratocumulus or Stratus may also be present
|
| 4 |
Stratocumulus cumulogenitus
|
4 |
Stratocumulus formed by the spreading out of Cumulus; Cumulus may also be present
|
| 5 |
Stratocumulus other than Stratocumulus cumulogenitus
|
5 |
Stratocumulus not resulting from the spreading out of Cumulus
|
| 6 |
Stratus nebulosus or Stratus fractus other than of bad weather,* or both
|
6 |
Stratus in a more or less continuous sheet or layer, or in ragged shreds, or both, but no Stratus fractus of
bad weather*
|
| 7 |
Stratus fractus or Cumulus fractus of bad weather,* or both (pannus),
usually below Altostratus or Nimbostratus
|
7 |
Stratus fractus of bad weather* or Cumulus fractus of bad weather,
* or both (pannus), usually below Altostratus or Nimbostratus
|
| 8 |
Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels
|
8 |
Cumulus and Stratocumulus other than that formed from the spreading out of Cumulus; the base of the Cumulus is
at a different level from that of the Stratocumulus
|
| 9 |
Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus,
Stratus or pannus
|
9 |
Cumulonimbus, the upper part of which is clearly fibrous (cirriform), often in the form of an anvil; either
accompanied or not by Cumulonimbus without anvil or fibrous upper part, by Cumulus, Stratocumulus, Stratus or pannus
|
| / |
CL clouds invisible owing to darkness, fog, blowing dust or sand, or other similar phenomena
|
/ |
Stratocumulus, Stratus, Cumulus and Cumulonimbus invisible owing to darkness, fog, blowing dust or sand,
or other similar phenomena
|