I've always moored my boat, so I'm FAR from an expert at docking/piers... but the logic I can see in docking bow out in a storm would be that it is more likely that waves will be primarily coming from the sea, rather than from the land... so bow-out would be preferable for taking large surf.... that being said... if said surf is so significant that this becomes important, I would think the waves would be bouncing off just about everything, and very "confused" at that point, hitting your boat from all directions. Of course, I also don't know that the entrance to your slip faces "out to sea"... so it's really going to depend on your specific marina's (and slip's) specifics, and how it faces the predominant direction of wind and waves. Seems like there are about a thousand other steps you could take in storm prep that would be more likely to matter than that (imho).