Wow. I've seen some decent-sized hail in my day, but that beats anything I've seen. It sounds like it was fairly slow moving and contained to a small area. I don't know how hail normally acts, but that does sound rather odd. I'm always surprised to see it there since it seems to come at odd times, like May.

You were however wanting some rain, I thought. Not large hurtling ice balls of doom. :)