Laos Sky imaged
by Peter Wise
The smooth rounded clouds immediately above the anvil shaped thunder
head are 'pileus' or
cap clouds formed when a layer of moist air is cooled as it is pushed
upward by the boiling cumulus beneath. Cloud so freshly
formed has uniform sized droplets or ice crystals and shows bright iridescence.
The ribbed iridescence is possibly in higher cirrocumulus
stratiformis, 'herringbone' clouds. In the distance are a variety
of lenticular cloud,
also famous for iridescence.