10 0 ISOLATED CLOUD OR FRAGMENTS OF CLOUD 21 1 CONTINUOUS CLOUD 32 2 BROKEN CLOUD - SMALL BREAKS, FLAT TOPS 43 3 BROKEN CLOUD - LARGE BREAKS, FLAT TOPS 54 4 CONTINUOUS CLOUD 65 5 BROKEN CLOUD - SMALL BREAKS, UNDULATED TOPS 76 6 BROKEN CLOUD - LARGE BREAKS, UNDULATED TOPS 87 7 CONTINUOUS OR ALMOST CONTINUOUS WAVES WITH TOWERING CLOUDS A" BOVE THE TOP OF THE LAYER 98 8 GROUPS OF WAVES WITH TOWERING CLOUDS ABOVE THE TOP OF THE LA" YER 109 9 TWO OR MORE LAYERS AT DIFFERENT LEVELS 1115 15 MISSING VALUE 12