Frequent. Applicable only to cumulonimbus (CB). Frequent 12 020008 (Used on aviation charts to describe the cloud type Cb) Obscured (OBSC) 15 020008 Embedded. Applicable only to cumulonimbus (CB). Embedded Embedded (EMBD) 16 020008 Sky clear (0 oktas). Sky clear 0 020008 Layers. Applicable only to cumulonimbus (CB). Layers 14 020008 2014-09-03T09:54:41.937Z Few (1 - 2 oktas). Few 1 020008 Broken/overcast 7 020008 (Many forecasts use scattered/broken or broken/overcast followed by cloud type(s)) Occasional embedded 11 020008 (Used on aviation charts to describe the cloud type Cb) Missing value 31 020008 1 Frequent embedded 17 020008 Broken (5 - 7 oktas). Broken 3 020008 Scattered (3 - 4 oktas). Scattered 2 020008 Isolated. Applicable only to cumulonimbus (CB). Isolated 8 020008 (Used on aviation charts to describe the cloud type Cb) Scattered/broken 6 020008 (Many forecasts use scattered/broken or broken/overcast followed by cloud type(s)) Occasional. Applicable only to cumulonimbus (CB). Occasional 10 020008 (Used on aviation charts to describe the cloud type Cb) Isolated embedded 9 020008 (Used on aviation charts to describe the cloud type Cb) Cloud distribution for aviation Overcast (8 oktas). Overcast 4 020008 Dense 13 020008 (Used on aviation charts to describe cloud that would cause sudden changes in visibility (less than 1 000 m))