TABLE 5. CLOUD AMOUNT TABLE 6. WATER COLOR 



(WMO Code 2700) 



Code Percent Percent Forel-Ule 

 Yellow Brown Scale 



Code 













1 



1/10 or less 



2 



2/10 - 3/10 



3 



4/10 



4 



5/10 



5 



6/10 



6 



7/10 - 8/10 



7 



9/10 or more 



8 



10/10 



9 



Sky obscured 



01 









I 



02 



2 





II 



03 



5 





III 



04 



9 





IV 



05 



14 





V 



06 



20 





VI 



07 



27 





VII 



08 



35 





VIII 



09 



44 





IX 



10 



54 





X 



11 



65 







XI 



12 





2 



XII 



13 





5 



XIII 



14 





9 



XIV 



15 





14 



XV 



16 





20 



XVI 



17 





27 



XVII 



18 





35 



XVIII 



19 





44 



XIX 



20 





54 



XX 



21 





65 



XXI 



TABLE 7. VISIBILITY (WMO Code 4300) 



Code 



Less than 50 metres (less than 55 yards) 



1 50-200 metres (approx. 55-220 yards) 



2 200-500 metres (approx. 220-550 yards) 



3 500-1,000 metres (approx. 550 yards-5/8 n.m. ) 



4 1-2 km (approx. 5/8-1 n.m.) 



5 2-4 km (approx. 1-2 n.m.) 



6 4-10 km (approx. 2-6 n.m.) 



7 10-20 km (approx. 6-12 n.m.) 



8 20-50 km (approx. 12-30 n.m.) 



9 50 km or more (30 n.m. or more) 



52 



