Rolling Clouds?

I got these images from a friend, and it looks amazing!

But here is my question.

What is the scientific explanation on how this happened?



I got these images also, but seems photoshopped, or are they real?

en.wikipedia.org...

"An arcus cloud is a low, horizontal cloud formation. Roll clouds and shelf clouds are the two types of arcus clouds. A shelf cloud is usually associated with the leading edge of thunderstorm outflow; roll clouds are usually formed by outflows of cold air from sea breezes or cold fronts in the absence of thunderstorms"

Whoa! Very cool! This happens in Australia I believe. It has something to do with the geography and weather patterns there. The scientific explanation escapes me at the moment. Star and flag to you though!

It's called an Arcus cloud So no Photoshop involved.

a reply to: IndependentOpinion

Rayleigh Taylor instability perhaps?

Different layers of air, cold/dense and hot. The boundary becomes unstable and starts to undulate. It so happens that conditions are right for condensation in some of the bumps.

The Wikipedia page is not really clear, but are they actually rolling like a log, if I can call it that?

I always like to imagine seeing a train traveling along street clouds (which are similar looking). I like to think clouds landscape the sky.

a reply to: IndependentOpinion

and just before anyone attempts to inject idiocy into the thread :

documented evidence of arcus clouds predated :- HAARP , manned flight and tesla

originally posted by: IndependentOpinion
The Wikipedia page is not really clear, but are they actually rolling like a log, if I can call it that?

If I remember right they dont actually have a rolling motion..

Here are some sources for the pics your friend sent you .. They are the Morning Glory Formation localized, in that pic , to Australia.


apod.nasa.gov...

tootlee.com...

Want an intriguing cloud phenomenon to work on? Try this one on for size.


Here it is filmed again somewhere else. Please disregard the cheesy title.

a reply to: IndependentOpinion

Roll clouds is another name for them. I have seen them once here. Very cool to see in person.

a reply to: opethPA

Awesome thanx!

New Alaskan pipeline?

this one's like a monster tsunami;

a reply to: network dude

I would love to see one in person!!!

originally posted by: IndependentOpinion
The Wikipedia page is not really clear, but are they actually rolling like a log, if I can call it that?

en.wikipedia.org...
en.wikipedia.org...

Yes, these are the relevant lines:

"Cool, sinking air from a storm cloud's downdraft spreads out across the land surface, with the leading edge called a gust front. This outflow cuts under warm air being drawn into the storm's updraft. As the lower cooler air lifts the warm moist air, its water condenses, creating a cloud which often rolls with the different winds above and below (wind shear)"

a reply to: stormcell

Thanks, and sorry, I must have read it too fast or something.

a reply to: CraftBuilder

Just my opinion of course, but all that looks pretty mechanical to me. Very odd to say the least!!! Wow!!

a reply to: SyxPak

I my mind the word that can sum up all that is Fascinating

a reply to: IndependentOpinion

To say the very least Man!! Trippy is a good one too, eh? LOL!!