TABLE 3. CLOUD TYPE 



TABLE 4. CLOUD AMOUNT 



Code 



Code 







Stratus or Fractostratus 







No clouds 



1 



Cirrus 





1 



Less than 1/10 or 1/ 



2 



Cirrostratus 





2 



2/10 and 3/10 



3 



Cirrocumulus 





3 



4/10 



4 



Altocumulus 





4 



5/10 



5 



Altostratus 





5 



6/10 



6 



Stratocumulus 





6 



7/10 and 8/10 



7 



Nimbostratus 





7 



9/10 and 9/10 plus 



8 



Cumulus or Frac 



itocumulus 



8 



10/10 



9 



Cumulonimbus 





9 



Sky obscured 



1/10 



TABLE 5. SEA AMOUNT 





Mean M 



ax . Height 







of Sea Waves 





Code 



in feet 



(Approx.) 



Description 













Calm (glassy) 



1 







- 1/3 



Calm (rippled) 



2 



1/3 



- 1 2/3 



Smooth (wavelets) 



3 



1 2/3 



- 4 



Slight 



4 



4 



- 8 



Moderate 



5 



8 



- 13 



Rough 



6 



13 



- 20 



Very rough 



7 



20 



- 30 



High 



8 



30 



- 45 



Very high 



9 



over 45 



Phenomenal* 



As might be expected in center of hurricane. 



26 



