A system using the Doppler shift of audible sound waves to measure atmospheric winds to heights of 1 km above the surface is described. Planned application of the device at a commercial airport required extensive transducer and antenna shielding to reduce the effect of ambient noise. Comparisons of winds measured by both the acoustic Doppler system and standard radiosondes indicate that high accuracy and resolution can be achieved, and that the wind profiles can be continually monitored with relatively simple ground based equipment.