39. Altocumulus in Several Sheets at Different Levels, Associated 

 With Thick Fibrous Veils and a Chaotic Appearance of the 

 Sky, M,. 



Tills picture shows a portion of a thundery sky. At the middle and 

 right near the upper margin there Is a patch of clear sky. The clouds 

 in the middle and upper levels are poorly defined. These clouds were 

 preceded by altocumulus casfellatus and altocumulus floccus and were 

 accompanied by thunderstorms in the vicmity. (Photo at Washing- 

 ton, D. C, by G. Slocum.) 



40. Altocumulus in Several Sheets at Diflferent Levels, Associated 

 With Thick Fibrous Veils and a Chaotic Appearance of the 

 Sky, M,. 



The sky described by this code classification has complex and 

 varied aspects. In this picture there are cumulus clouds below and at 

 the upper right. There are also patches of altocumulus and others 

 with a cirriform aspect. The clouds are chaotic but not ragged. 

 Altogether the sky has a distinct "thundery" tendency which is 

 characteristic. (Photo at Manila, P. I., by C. E. Deppermann.) 



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