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This is called a lenticular cloud, formed when wind is forced upward by an obstruction and it cools rapidly below the dew point. In the bottom left photo of your collage, it seems to be happening above a mountain
When moist, stable air flows over a larger eddy, such as those caused by mountains, a series of large-scale standing waves form on the leeward side of the mountain. If the temperature at the crest of the wave drops below the local dew point, moisture in the air may condense to form lenticular clouds. Under certain conditions, long strings of lenticular clouds may form near the crest of each successive wave, creating a formation known as a "wave cloud". These wave systems can produce large updrafts, occasionally enough for water vapour to condense and produce precipitation.
There are ancient Japanese illustrations of lenticular clouds over Mount Fuji. Nothing to do with chemtrails.
I found this tidbit from a Harold Humes, a quite bizarre fellow.
"The story in a nutshell is this: when lenticular clouds were first sighted in the 50's, the problem nobody could get around was the fact that they were able to hold their position against prevailing winds. Now, a normal cloud moves with the wind because it's part of the wind. In other words, a cloud is water vapor, coming out of a solution. It's condensing to make a cloud. Water vapor is one of the gases that make air. When water vapor comes out of the air to make a cloud, the cloud moves along normally. It's perfectly logical, common sense tells you that.
The puzzling thing about lenticular clouds--which are water clouds too--the thing that puzzled everyone who looked at them, from airline pilots to meteorologists, was the fact that they could hold their position against prevailing winds. For example, you'd see a lenticular cloud sitting over the Charles River and there might be a prevailing breeze of 25 knots blowing but the cloud would stay in exactly the same position. The wind goes on but the cloud stays put. That presented a lot of problems, because if the cloud's not moving with the wind, that suggests it's not an ordinary meteorological phenomenon. There's something going on that's new. Definitely novel. It suggests the possibility that the cloud is not a meteorological phenomenon but in fact an ethereal phenomenon."
It's an omen!
More likely than chemtrails lol
The Mt Fuji ones are spectacular. Really puts other mountains to shame. I've not actually seen them before.
While the other post looks lenticular, these definitely do not look the same in my opinion.
Not sure what other post you’re talking about, but lenticular clouds are just that; clouds. Moving formations of water vapor. They take lots of different shapes as they’re forming and degrading and depending on the time of day will reflect light different ways.
Here (bbc.co.uk) are a bunch of different shapes of lenticular clouds, all taken around sunset
I’d bet if you were standing directly under the one in the first photo with the sun higher in the sky it’d look a lot like what you posted
(post is archived)