80 



heavy alto - stratus 

 above 



Very heavy olto -strotus 



mammatus above 

 / 



•So', • • ' 



Clear 

 of cu 



double layer a-st 

 \ 14.000' a 26,000' / 





li\ Clear ' 



7; 



Flight Path 



t 

 0255 Z 



Figure 9 (after Malkus and Riehl, 1964). Trade-wind cloud map for weak 

 wind conditions. Constructed from time-lapse movies: The 

 numbers indicate heights of cumulus tops to the nearest 

 thousand feet. 



