CLOUDS 



73 



CODE TABLE 3 



Symbol N — Fraction of the celestial dome covered by clouds 

 Symbol Nh — Fraction of celestial dome covered by type of cloud reported for Ci (or Cm if no Cl cloud present) 



Notes 



' "Fragments of clouds" are coded as 1. 

 ' "Overcast but with openings" I3 coded as 7. 

 ' Sky obscured by fog. rain, snow, smoke or 

 other phenomena or obstruction except clouds. 



8330. HEIGHT OF LOWEST CLOUD OF TYPES Cl OR Cm " (h). Select 

 the code figoire from Code Table 10 corresponding to the height of the lowest 

 cloud (including fragments, i.e., less than 1/8 but more than none) of the 

 classes C^ or C^ and enter the figure in column 21. (Note that this height 

 is not necessarily the height of the base of the lowest cloud reported as C]_, 

 or C]y[ in accordance with 318340 and 8350.) Enter 9 when there are no Cl 

 or Cm clouds present; enter X when the cloud base cannot be reported owing 

 to darkness or any other reason, except that when the sky is obscured by 

 rain, snow, fog, smoke or other phenomena, code "h" as and "Nj^" as 9. 



Code Table 10 

 Symbol h. — Height of base of lowest cloud (Cl or Cm) above sea 



