CIRRUS FIBRATUS, SOMETIMES UNCINUS, NOT PROGRESSIVELY INADIN G THE SKY
12
CIRRUS SPISSATUS, IN PATCHES OR ENTANGLED SHEAVES, WHICH USU ALLY DO NOT INCREASE AND SOMETIMES SEEM TO BE THE REMAINS OF THE UPPER PART OF A CUMULONIMBUS; OR CIRRUS CASTELLANUS OR FLOCCUS
13
CIRRUS SPISSATUS CUMULONIMBOGENITUS
14
CIRRUS UNCINUS OR FIBRATUS,OR BOTH, PROGRESSIVELY INVADING T HE SKY ; THEY GENERALLY THICKEN AS A WHOLE
15
CIRRUS (OFTEN IN BANDS) AND CIRROSTRATUS, OR CIRROSTRATUS AL ONE, PROGRESSIVELY INVADING THE SKY; THEY GENERALLY THICKEN ASA WHOLE, BUT THE CONTINUOUS VEIL DOES NOT REACH 45 DEGREES ABOVE THE HORIZON
16
CIRRUS (OFTEN IN BANDS) AND CIRROSTRATUS, OR CIRROSTRATUS AL ONE, PROGRESSIVELY INVADING THE SKY; THEY GENERALLY THICKEN ASA WHOLE, BUT THE CONTINUOUS VEIL EXTENDS MORE THAN 45 DEGR REES ABOVE THE HORIZON, WITHOUT THE SKY BEING TOTALLY COVERE D
17
CIRROSTRATUS COVERING THE WHOLE SKY
18
CIRROSTRATUS NOT PROGRESSIVELY INVADING THE SKY AND NOT ENTI RELY COVERING IT
19
CIRROCUMULUS ALONE, OR CIRROCUMULUS PREDOMINANT AMONG THE CH CLOUDS
20
NO CM CLOUDS
21
ALTOSTRATUS TRANSLUCIDUS
22
ALTOSTRATUS OPACUS OR NIMBOSTRATUS
23
ALTOCUMULUS TRANSLUCIDUS AT A SINGLE LEVEL
24
PATCHES (OFTEN LENTICULARIS) OF ALTOCUMULUS TRANSLUCIDUS, CO NTINUALLY CHANGING AND OCCURING AT ONE OR MORE LEVELS
25
ALTOCUMULUS TRANSLUCIDUS IN BANDS, OR ONE OR MORE LAYERS OF ALTOCUMULUS TRANSLUCIDUS OR OPACUS, PROGRESSIVELY INVADING T HE SKY; THESE ALTOCUMULUS CLOUDS GENERALLY THICKEN AS A WHOL E
26
ALTOCUMULUS CUMULOGENITUS (OR CUMULONIMBOGENITUS)
27
ALTOCUMULUS TRANSLUCIDUS OR OPACUS IN TWO OR MORE LAYERS, OR ALTOCUMULUS OPACUS IN A SINGLE LAYER, NOT PROGRESSIVELY INV ADING THE SKY, OR ALTOCUMULUS WITH ALTOSTRATUS OR NIMBOSTRAT US
28
ALTOCUMULUS CASTELLANUS OR FLOCUS
29
ALTOCUMULUS OF CHAOTIC SKY, GENERALLY AT SEVERAL LEVELS
30
NO CL CLOUDS
31
CUMULUS HUMILIS OR CUMULUS FRACTUS OTHER THAN OF BAD WEATHER , OR BOTH
32
CUMULUS MEDIOCRIS OR CONGESTUS, WITH OR WITHOUT CUMULUS OF S PECIES FRACTUS OR HUMULIS OR STRATOCUMULUS, ALL HAVING THEIR BASES AT THE SAME LEVEL
33
CUMULONIMBUS CALVUS, WITH OR WITHOUT CUMULUS, STRATOCUMULUS OR STRATUS
34
STRATOCUMULUS CUMULOGENITUS
35
STRATOCUMULUS OTHER THAN STRATOCUMULUS CUMULOGENITUS
36
STRATUS NEBULOSUS OR STRATUS FRACTUS OTHER THAN OF BAD WEATH ER, OR BOTH
37
STRATUS FRACTUS OR CUMULUS FRACTUS OF BAD WEATHER, OR BOTH (PANNUS), USUALLY BELOW ALTOSTRATUS OR NIMBOSTRATUS
38
CUMULUS AND STRATOCUMULUS OTHER THAN STRATOCUMULUS CUMULOGEN ITUS, WITH BASES AT DIFFERENT LEVELS
39
CUMULONIMBUS CAPILLATUS (OFTEN WITH AN ANVIL), WITH OR WITHO UT CUMULONIMBUS CALVUS, CUMULUS, STRATOCUMULUS, STRATUS OR P ANNUS
59
CLOUD NOT VISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDSTO RM, OR OTHER ANALOGOUS PHENOMENA
60
CH CLOUDS INVISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDS TORM, OR OTHER SIMILAR PHENOMENA, OR BECAUSE OF A CONTINUOUS LAYER OF LOWER CLOUDS
61
CM CLOUDS INVISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDS TORM, OR OTHER SIMILAR PHENOMENA, OR BECAUSE OF A CONTINUOUS LAYER OF LOWER CLOUDS
62
CL CLOUDS INVISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDS TORM, OR OTHER SIMILAR PHENOMENA