Kind of look like they might be shadows cast by some Kelvin Helmholtz cloudsNot sure if these are crepuscular rays or just shadows...or even what the difference is...but still pretty cool nonetheless.
I took this picture on March of 2013 from my backyard. Posted it to FB and it went around the world. I even saw posts by celebrities that had re-posted this image. Clearly it looks like something heavenly?
I took this photo last August in Lot et Garonne, south west France. I had never seen a cloud formation quite like this before, but we do get some interesting and beautiful 'cloud displays' here.
Thank you so much for the info, it's fascinating. I have just googled Pileus clouds and seen some great pictures. I can see why they are named after the Roman hat!Hi @starlet. Beautiful photo - those are Pileus clouds created by the big clouds forcing air flow above them upwards to the point where it cools enough for clouds to form
How about the nearly black clouds in front of the white billows? Why are they almost black ?I took this photo last August in Lot et Garonne, south west France. I had never seen a cloud formation quite like this before, but we do get some interesting and beautiful 'cloud displays' here.
I have wondered about the dark clouds too. I think that the camera auto exposure has probably over compensated due to pointing at the sky, therefore darkening the clouds, but those clouds were pretty dark anyway.How about the nearly black clouds in front of the white billows? Why are they almost black ?
(I kinda know why, but I'd like to hear other explanations..without prompting.)
Thank you Jon, that was an interesting read and I have learned a lot. Yes, the picture was taken quite late in the day (8.30 in the evening) which would account for the clouds being in shadow.All clouds that are made up of water vapor and are in liquid phase look the same at small scale. It's just water vapor.
Growing up in coastal LA, I got to see nearly every cloud type. The "June Gloom" is quite instructive: a low stratus cloud that when viewed from below (like in the coastal areas or out on the water) looks like the standard "June Gloom" cloud (grey, "gloomy", and flat underbelly), when it's on the ground (like at slightly higher elevations in LA) it's a dripping grey fog, and when near the top (as when driving up to 900'-elevation Pasadena from 200'-elevation downtown) gets thinner and brighter as you approach the top of the stratus, then finally bright sunny daylight and now the cloud's below. Above that cloud deck, the deck is in full sun and very bright, often pretty flat as well, since it's a stratus. (As a side note, the June gloom, which often goes from April through September, is one of the reasons why I now live in Phoenix!)
In the photo above, the towering cumulus (correctly called cumulus congestus, but I like towering better) in the background is a rapidly growing (vertically) plume of water vapor. The pileus clouds on top are really neat, they represent strong horizontal winds at high level that are entering a wave of compression above the approaching cumulus pile and as the towering cumulus enters that layer, may start to shear to image-right and begin to form a cumulonimbus.
The towering cumulus is obviously in full low-angle daylight. The clouds in the foreground are far less substantial wisps, where water vapor has accumulated, but are in shadow likely due to other clouds between them and the low sun. In shadow means they're not directly illuminated, so against the fully illuminated towering cumulus they're far far far dimmer.
The huge difference in luminosity between the towering cumulus cloud in the background and everything else in the image is definitely a factor in the camera's computer. The trees and foliage in the foreground are almost certainly not black! They're just nowhere near as illuminated as the cloud.
Cheers - Jon N7UV
Except for the ice clouds, like cirrus, which are made of water in the solid phase.All clouds that are made up of water vapor and are in liquid phase look the same at small scale. It's just water vapor.
I was on a flight back in 2017 and saw the shadow of our plane as well and managed to get a shot of it.Not too long ago I was flying high above the clouds and saw a complete rainbow circle (glory) with the shadow of the plane inside of it. Too bad I didn't have any camera with me, but apparently it is a phenomenon seeing every now and then:
It just seemed so unreal, almost had to be 'fake'
Outside my house today.
Thanks for giving me a name to these types of clouds.some mammatus clouds over the ranch today not the dark deep good ones but well best i seen for some time