The weather sources used are which of the following?

• A. NWS or WSI
• B. NWS only
• C. WSI only
• D. FAA weather desk

Answer: (A)

Weather information used in flight operations comes from official meteorological data providers, typically including the National Weather Service and private providers like Weather Services International. Pilots and airlines rely on NWS for public forecasts, METARs, TAFs, radar, and other weather data, and many systems also incorporate WSI’s commercial products for more detailed or integrated planning. That’s why the correct choice is NWS or WSI—either source may be used depending on the system and situation. The FAA weather desk isn’t the usual primary data source crews consult for weather information, and relying on only one provider would miss the broader set of data used in practice.