Stall speed is a function of speed and weight. So typically, if an aircraft is half tanks and one up then Vs is usually about 5 knots less than at MAUW. I usually calculate this if I know I'm going into a short strip however if it's a gusty day I would increase V to have more aerodynamic control. The last aircraft I had, had an unusually loud stall warner that was designed to sound above cockpit noise before we all started wearing headsets.