2 Clips. Lenticular clouds (Altocumulus lenticularis) are stationary lens-shaped clouds that form in the troposphere, normally in perpendicular alignment to the wind direction. Lenticular clouds can be separated into altocumulus standing lenticularis, stratocumulus standing lenticular, and cirrocumulus standing lenticular. Snowy mountains sunrise sunset afternoon morning mountain chain thermal air flow microclimate hot air movement circular dome umbrella clouds. 3840×2160 UHD 4K