I've seen first hand the waves generated from Elena back in 1985 with her 100 mph plus wind.... the sound is relatively shallow, the waves at best as they crashed on the sea wall were maybe 5 feet tops... the wind blows so hard it just churns the sound into a froth of foam and chaos and pulverizes them.... now you will definitely see somewhat bigger waves with a Cat 4, but the largest waves will be in areas not protected by the barrier islands.... Georges had maybe 4 foot waves max in front of my house.... Ship Island, Dauphin Island, Pensacola, PC will all have those massive waves Daniel was referring to but you will not see that size wave in the MS Sound off the coast of Biloxi, at I have never see waves that big in my experience.... water is just to shallow to support them... hope I' right on this one....