10 0 CIRRUS (CI)...............CI 21 1 CIRROCUMULUS (CC).........CC 32 2 CIRROSTRATUS (CS).........CS 43 3 ALTOCUMULUS (AC).........AC 54 4 ALTOSTRATUS (AS).........AS 65 5 NIMBOSTRATUS (NS).........NS 76 6 STRATOCUMULUS(SC).........SC 87 7 STRATUS (ST).........ST 98 8 CUMULUS (CU).........CU 109 9 CUMULONIMBUS (CB).........CB 1110 10 NO CH CLOUDS 1211 11 CIRRUS FIBRATUS, SOMETIMES UNCINUS, NOT PROGRESSIVELY INADIN" G THE SKY 1312 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 1413 13 CIRRUS SPISSATUS CUMULONIMBOGENITUS 1514 14 CIRRUS UNCINUS OR FIBRATUS,OR BOTH, PROGRESSIVELY INVADING T" HE SKY ; THEY GENERALLY THICKEN AS A WHOLE 1615 15 CIRRUS (OFTEN IN BANDS) AND CIRROSTRATUS, OR CIRROSTRATUS AL" ONE, PROGRESSIVELY INVADING THE SKY; THEY GENERALLY THICKEN" ASA WHOLE, BUT THE CO 1716 16 CIRRUS (OFTEN IN BANDS) AND CIRROSTRATUS, OR CIRROSTRATUS AL" ONE, PROGRESSIVELY INVADING THE SKY; THEY GENERALLY THICKEN" ASA WHOLE, BUT THE CO 1817 17 CIRROSTRATUS COVERING THE WHOLE SKY 1918 18 CIRROSTRATUS NOT PROGRESSIVELY INVADING THE SKY AND NOT ENTI" RELY COVERING IT 2019 19 CIRROCUMULUS ALONE, OR CIRROCUMULUS PREDOMINANT AMONG THE CH" CLOUDS 2120 20 NO CM CLOUDS 2221 21 ALTOSTRATUS TRANSLUCIDUS 2322 22 ALTOSTRATUS OPACUS OR NIMBOSTRATUS 2423 23 ALTOCUMULUS TRANSLUCIDUS AT A SINGLE LEVEL 2524 24 PATCHES (OFTEN LENTICULARIS) OF ALTOCUMULUS TRANSLUCIDUS, CO" NTINUALLY CHANGING AND OCCURING AT ONE OR MORE LEVELS 2625 25 ALTOCUMULUS TRANSLUCIDUS IN BANDS, OR ONE OR MORE LAYERS OF" ALTOCUMULUS TRANSLUCIDUS OR OPACUS, PROGRESSIVELY INVADING T" HE SKY; THESE ALTOCUM 2726 26 ALTOCUMULUS CUMULOGENITUS (OR CUMULONIMBOGENITUS) 2827 27 ALTOCUMULUS TRANSLUCIDUS OR OPACUS IN TWO OR MORE LAYERS, OR" ALTOCUMULUS OPACUS IN A SINGLE LAYER, NOT PROGRESSIVELY INV" ADING THE SKY, OR AL 2928 28 ALTOCUMULUS CASTELLANUS OR FLOCUS 3029 29 ALTOCUMULUS OF CHAOTIC SKY, GENERALLY AT SEVERAL LEVELS 3130 30 NO CL CLOUDS 3231 31 CUMULUS HUMILIS OR CUMULUS FRACTUS OTHER THAN OF BAD WEATHER" , OR BOTH 3332 32 CUMULUS MEDIOCRIS OR CONGESTUS, WITH OR WITHOUT CUMULUS OF S" PECIES FRACTUS OR HUMULIS OR STRATOCUMULUS, ALL HAVING THEIR" BASES AT THE SAME L 3433 33 CUMULONIMBUS CALVUS, WITH OR WITHOUT CUMULUS, STRATOCUMULUS" OR STRATUS 3534 34 STRATOCUMULUS CUMULOGENITUS 3635 35 STRATOCUMULUS OTHER THAN STRATOCUMULUS CUMULOGENITUS 3736 36 STRATUS NEBULOSUS OR STRATUS FRACTUS OTHER THAN OF BAD WEATH" ER, OR BOTH 3837 37 STRATUS FRACTUS OR CUMULUS FRACTUS OF BAD WEATHER, OR BOTH" (PANNUS), USUALLY BELOW ALTOSTRATUS OR NIMBOSTRATUS 3938 38 CUMULUS AND STRATOCUMULUS OTHER THAN STRATOCUMULUS CUMULOGEN" ITUS, WITH BASES AT DIFFERENT LEVELS 4039 39 CUMULONIMBUS CAPILLATUS (OFTEN WITH AN ANVIL), WITH OR WITHO" UT CUMULONIMBUS CALVUS, CUMULUS, STRATOCUMULUS, STRATUS OR P" ANNUS 4159 59 CLOUD NOT VISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDSTO" RM, OR OTHER ANALOGOUS PHENOMENA 4260 60 CH CLOUDS INVISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDS" TORM, OR OTHER SIMILAR PHENOMENA, OR BECAUSE OF A CONTINUOUS" LAYER OF LOWER CLOUD 4361 61 CM CLOUDS INVISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDS" TORM, OR OTHER SIMILAR PHENOMENA, OR BECAUSE OF A CONTINUOUS" LAYER OF LOWER CLOUD 4462 62 CL CLOUDS INVISIBLE OWING TO DARKNESS, FOG, DUSTSTORM, SANDS" TORM, OR OTHER SIMILAR PHENOMENA 4563 63 MISSING VALUE 46