Are the wind settings in AH arena wide? e.g. I set the wind speed and direction [optional alt] , and the entire arena now has those conditions? Or can I set the wind differently in some areas? Maybe a few more layers in terrain.res's could be 'wind maps'. two layers, direction and gradient for speed. And if possible (don't know if it's already like this?) but set wind direction in z plane too, not just x,y.
Of course modeling the interactions between these fluids at their boundaries could be more than they're worth...