I played alto with a trio at an outdoor venue on a windy day. We were set up on a porch, facing the audience and wind was blowing at our left side. The bass and alto both experienced low notes not sounding when the wind was gusting. When we shifted position so that the wind was at our backs we could play low notes. We figure it had to do with wind blowing across the holes when we sat perpendicular to the wind, and facing the small, but appreciative audience. Inquiring minds want to know what was going on with air flow.