reference|http://artefacts.ceda.ac.uk/badc_datadocs/surface/code.html
short_description|Genus of cloud
wmo_code|0500
long_description|Genus of cloud
codeTYPE|S
@| Values
/| cloud not visible owing to darkness, fog, duststorm, sandstorm or other analogous phenomena
0|cirrus  (CI)
1|cirricumulus (CC)
2|cirrostratus (CS)
3|altocumulus (AC)
4|altostratus (AS)
5|nimbostratus (NS)
6|stratocumulus (SC)
7|stratus (ST)
8|cumulus (CU)
9|cumulonimbus (CB)