Aren't land obstacles and obstructions(natural and manmade) taken into account when wind velocity is measured during landfall? I mean if a hurricane has a sustained wind of say 160mph, it's out in the wide open ocean. No impediments to the strength of the winds. When a anemometer on land measures the wind has been disrupted by land(hills,mountains, trees) as well as man made infrastructure(buildings etc). Makes me think you'll never get a true representation of the max wind speeds, atleast on land anyway. Perhaps this is all factored in? Always been curious about this.