FORMS OF CLOUDS 



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distinct structure, exhibiting tangled figures. This cloud formation 

 often produces halos around the sun and moon. 



' FIG. 17. Cirro-stratus. 



When cirrus merge into cirro-stratus, and when cumulus increase toward 

 evening and become lower, expect wet weather. 



Cirro- Cumulus. 3 to 6 miles high. A collection of fleecy 

 clouds. Small white balls and wisps without shadows, or with very 



FIG. 18. Cirro-cumulus. 



faint shadows, which are arranged in groups and often in rows. 

 Many people call this a " mackerel sky." 



