I was sitting on top of Mt. Marcy (highest point in NY) about five years ago, all alone (which is a rare summit to have solo) when hail started. I was thinking it was pretty, until I thought about the lightning that usually follows. I ran from the top of that summit, and I have no idea if lightning stuck that day, but it scared the crap out of me.
But that is the type of situation that results in lightning strikes. Not so much your bike on the side of road. No guarantee expressed or implied.