[SunkenCiv]

[Credit: Megan Hanrahan (Pierre cb), Wikipedia]

[Diana in Wisconsin]

Neat! I’ve had ‘shelf clouds,’ which are the younger sibling to these, over my Back Forty. Simply amazing to see! :)

[blueunicorn6]

I don’t know. For some reason, that photo reminds me of the time when Brenda and I were in the cab of the pickup after the dance and she wanted to show me her nimbus.

[lbryce]

There are myriad examples of just such weird cloud formations.
Do Google Image Search "weird cloud formations"

[afraidfortherepublic]

Cloud formation over Wisconsin. Anybody know where? It’s just gry and drizzly here. No spectacular clouds in sight.

FReep Mail me if you want on, or off, this Wisconsin interest png list.

[G Larry]

Never seen one of these in life or pics.

Would be a scary sight!

[Thorliveshere]

I love the roll clouds! They look so imposing...

[LiberConservative]

Saw one of these once when I was in CO. Very impressive and scary.

[Just another Joe]

It's actually 'wormhole'.
Don't those people know ANYTHING?

[huldah1776]

had to look for more with explanations:

http://www.wired.com/wiredscience/2009/09/clouds/

[mikrofon]

Cool pic!

Throw in a bunch of sharks & it would look like a tsunami scene from a bad sci-fi flick ....