A fire growth model (FARSITE) has been developed for use on personal computers (PC's). Because PC's are commonly used by land and fire managers, this portable platform would be an accustomed means to bring fire growth modeling technology to management applications. The FARSITE model is intended for use in projecting the growth of prescribed natural fires for wilderness areas. The PC model requires the support of a geographic information system (GIS) to manage and provide landscape data. FARSITE currently uses a stream of weather and wind changes along with landscape data downloaded from the GIS to model fire growth.