Cap cloud

I saw this recent video on Instagram of a cap cloud (Pileus in meteorological parlance) on top of Mount Fuji in Japan and thought how wonderful it looked, and wondered how the view was from the crater rim looking up from under the cap. A quick Google search revealed many more interesting images or videos of pileus from around the world, Mount Fuji does seem to come up fairly regularly, but there are other mountains that are prone to the effect too.

Of course they don’t always require a mountain to form on, they can may be frequently found on top of a large cumulus or cumulonimbus cloud.

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