Formation of what looks like drapes of curtain underneath this high-level clouds perhaps due to some falling precipitation from this cloud. Due to the cloud`s vicinity of the sun, this sub-species could not be definitely concluded as cirrocumulus virga. In fact, it might have well been cirrus spissatus which was observed later (click on the first thumbnail). However, the weather sounding showed the ideal conditions for virga to occur since the indicated high-level clouds would have precipitated into very dry air underneath it. The wind was moderate at upper levels due to anticyclonic conditions.