FoG is part of the Forecaster's Production Assistant (FPA), a workstation environment developed by Environment Canada as a productivity aid for its meteorologists. Forecasters use FPA's graphical editor to modify a map showing barometric pressure, the location of fronts, and other data. After modifying the map, the forecaster presses the "Generate" button, and FoG automatically generates a textual weather report for the area in both English and French.
FoG, as part of FPA, has been used by forecasters in Environment Canada since its initial introduction in 1993. FPA is considered to be the most advanced forecaster productivity enhancement tool of its kind in the world.