A lot is up to chance. The front tends to be wetter, the back tends to be less wet. This is not 100% by any means, and you could get anywhere from a mild splash -> completely soaked.
There is a for sure fire way technique on not getting wet (or very little) on JP. Just duck at the last minute, put your head into the cushion that is in front of you. I always do this (unless I want to get wet) and at most just get a little splash on my back. I think if you do this a lot of the water may go behind you to splash the person behind. This typically works quite well. Although JP is typlcally not a get drenched type of ride, unless you happen to be in the particular sweet spot, and like others have said, it can vary due to chaos theory.
I wouldn't make the claim that any technique is "surefire." I've experienced everything from a mild sprinkle to being totally drenched on JP and sometimes it's just a matter of luck. If you ride, I would count on getting completely soaked. If you don't, you'll be pleasantly relieved. Better that than expecting NOT to get wet and then have the opposite happen.![]()
I am trying to go bagless, so that means no ponchos. I am thinking I better get all of my HP pictures first, just in case my hair gets messed up on the ride!