This is a strong claim. Can you show any example of a cumuliform cloud that looks like this, with a broad, generally flat face, but sloping uniformly upward?
Maybe yes, I mean, I can go goggling around searching for a suitable image of a cloud. I'll do it tomorrow I guess (it's pretty late here now), I may find it as I may not.
I'm no metereologist, but it does not seem unconceivable at all for me for a towering cloud (sorry for the non-technical term, it's the best I have) with a rim which is slanted suitably forward to exist (it would be even rather easy to calculate constraints for the slant angle, given it must let the line of sight of the F-18 reach the Atlas, but I digress). I have seen clouds of any possible form and shape, in effect.
So yes, tomorrow I'll try, and I even have a better idea:
QUESTION (WANTED PICTURE)
Can anyone here with some perk for metereology find a picture of a 'towering' cloud, something like this:
which also have an upper rim which slants somewhat inward, to be clear, something like this, seen in section:
As an additional bonus, the top of the cloud is higher than 25kft = 8300m, I cannot say how much, I'd guess 1-3km, but it's just a guess.
It doesnt even need to be a whole cloud really, just a suitable bump (say 5-10km wide, 1-3 km high) with a suitable slanting face will do.
Edit! maybe even an enlargement of one of the 'bumps' in the picture of the cumuliform cloud you posted would already be enough. I have no idea which size those bumps are, though (and all the fine structure of the cloud is anyway lost, so enlarging it will not, visually, recreate the Gimbal, but that'd be minor). This is an example I just copied&pasted , just imagine you're looking at the slanting surface from below, so you can also see the sky above:
But as I said I don't know the size of those bumps so don't take this picture at face value.
If you can find a suitable picture, you surely gain a thanks (and, in case, a citation of course).
Good night everyone
PS: my example was the first picture of 'sub-vertical cloud' I found on wikipedia, much zoomed. It's just illustrative (yet I hope convincing), to show how the Gimbal video was made. I'm not implying it was that exact type of cloud of course (I even wrote something along that lines somewhere, but it's really goodnight time now, c ya all)