I just love this fountain. It's one of my favorite things at Disney. I was quite depressed a couple of years ago when they rehabbed it, but it was great to see it back up.
I do know that sometimes, they limit the height of the water on windy days. So people don't get soaked.
They'll have it running, but not to the music where the water dances sooooooooooo high.
At least that's what a CM told me once.