Which are approved sources of weather?

• A. NASA, JMA, EASA
• B. FAA, METAR, TAF
• C. NOAA, WMO, NHC
• D. WSI, NWS, NATO

Answer: (D)

Weather information used in flight planning comes from trusted, recognized sources that officially provide data or standardize it for aviation. The combination of WSI, NWS, and NATO fits this idea well: WSI supplies professional weather products used by carriers for planning and decision support; NWS is the official U.S. weather service delivering observations and forecasts used in aviation operations; NATO offers standardized meteorological information for international operations, ensuring consistency across allied routes. This mix reflects the type of credible, cross-border weather sources pilots rely on. The other options mix agencies that aren’t primary weather data providers for civil aviation or present weather products rather than the data sources themselves.