Table 9. Height of low clouds 

 Symbol h — Height above sea of base of the cloud 



Notes 



1. Symbol "h" reports the height of the base of the 

 lowest cloud layer of Cl or C M clouds. When only frag' 

 ments of clouds are present, "h" indicates the height of 

 the fragments. 



2. If the height of the cloud base is exactly equal to a 

 height given in the table, the higher code figure is used. 

 For example, a height of 600 feet is coded as 3. 



3. When the sky is obscured by rain, snow, fog, smoke, 

 or other phenomena so that cloud cannot be observed, 

 "h" is coded as and "N h " as 9. 



4. If the height of the cloud base cannot be reported 

 owing to darkness or any reason not covered bv Note 3. 

 an X is reported for "h". 



17 



