III. Cloud Type 



Code 







1 

 2 

 3 

 h 

 5 



stratus or Fractostratus 



Cirrus 



Cirrostratus 



Cirrocumulus 



Altocumulus 



Altos tratus 



Stratuscumulus 



Nimbos tratus 



Cumulus or Fractocumulus 



Cumulomunbus 



IV. Cloud Amount 



Code 









No clouds 







1 



Less than 1/10 or , 



1/10 





2 



2/10 and 3/10 







•^ 



Vio 







h 



5/10 







5 



6/10 







6 



7/10 and 8/10 







7 



9/10 and 9/10 plus 







8 



10/10 







9 



Sky obscured 



V. Sea Amount 

 Approximate 





;od€ 





Height (feet) 



Description 











Calm 



1 





less than 1 



Smooth 



2 





1 to 3 



Slight 



3 





3 to 5 



Moderate 



h 





5 to 8 



Rough 



5 





8 to 12 



Very rough 



6 





12 to 20 



High 



7 





20 to iiO 



Very High 



8 





kO and over 



Mountainous 



9 





•*"——•"- 



Very rough 

 confused sea 



53 



