BritishUFOFiles - uap_vol2_ptb_pgs16to30

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UN - _Atthe top of cumulus clouds to form a ‘cap-cloud’ (pileous cloud) - With a ‘metallic grey’ colour 4 If cumulus cloud below a cap-cloud evaporates or disperses the lenticular cap can descend (sink). They can remain poised or slowly wavering above hills. Lenticular effects can form with several basic cloud types, eg Altocumulus Lenticulans, Cumulus ileus, ——_Strato-Cumulus Lenticularis etc 5 Some photographs ( for example, at Figure 2) show that lenticularis clouds (or ‘wave clouds’) can...