Quote Originally Posted by Allyrion View Post
I would agree with that if Thunder didn't always seem to proc one right after the other. I've had procs for another one while in the process instantly casting a Thunder III proc.
The odds of that should be astronomical, but it happens quite a bit.
Or I should say, I don't get thundercloud procs much but when I do it almost always chains.

The people earlier were saying they had the same experience, so I'm not going to trust the probability in this case.
Any anecdotal evidence, however common, means nothing if probability provides a sufficient answer.