Which organization produces GFA?

The correct answer is that Environment Canada produces the Graphical Area Forecasts (GFA). Environment Canada plays a crucial role in providing meteorological services and weather forecasting in Canada. This includes the issuance of various types of forecasts, such as the GFA, which are specifically designed for aviation purposes. These graphical forecasts encompass important weather data like cloud cover, precipitation, and other significant meteorological factors that are essential for flight planning and safety.

Other organizations mentioned do contribute to meteorological and aviation safety but are not responsible for producing the GFA in Canada. The National Weather Service focuses on United States weather conditions, while the World Meteorological Organization provides a framework for international cooperation in meteorology but does not issue GFA directly. The Canadian Air Transport Security Authority is primarily concerned with aviation security and does not engage in weather forecasting. This delineation of responsibilities clarifies why Environment Canada is the entity responsible for producing the GFA.