At the present time the National Weather Service's Automated Surface Observing System (ASOS) uses a cup and vane anemometer to measure wind speed and direction and to determine gusts. The algorithm for computing a gust requires sampling once per second and taking a five second average. WMO reporting practice requires a three second average of one second values for computing a gust. For the cup and vane anemometer, the difference between a five second and a three second average is minor because the distance constant of this type of sensor is on the order of 25 feet; however, under the ASOS Planned Product Improvement Program, sonic anemometers are being evaluated for their potential to replace the current cup and vane technology. Their fast responses to wind fluctuations will permit measuring wind at a greater resolution. However from an aviation standpoint, fast response would also mean reporting more and higher gusts. Thus, the algorithm to process one second wind into gust and peak wind from a sonic anemometer will likely be different from the current algorithm for processing one second wind from a cup and vane. In this paper we discuss the philosophy behind the current ASOS wind processing algorithm and discuss the changes that likely will be required for a sonic anemometer