Snipers have become an integral part of the modern battlefield and the effectiveness of a sniper team (shooter and spotter) is closely tied to their ability to successfully acquire and engage targets. This in turn is a function of numerous variables, many of which can be overcome by training, skill, experience, and/or advances in technology. One variable however, has proven very challenging and this is wind deflection of the bullet. This study focuses on improving calculations for wind deflection by developing wind characterization models that may be applied by a sniper team in the field. This study used two test areas, one with little to no topgraphic relief and subsequently little expected topographic effect on wind patterns, and a second, hillier test area where topographic effects on wind patterns were anticipated. Wind velocity and direction was collected at each test site using an array of 15 Kestrel anemometers. Spatial interpolation was used to produce wind speed maps. These maps were used to produce wind characterization models that capture unique features of a given wind event at each test site. These models were combined with existing ballistics software (e.g., Ballis-tec) to develop a software application that could be deployed in the field.