Which are the weather sources?

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

Answer: (B)

In aviation weather, you rely on credible sources that provide the data you need for planning and operations. You can use either the National Weather Service, which is the official government source for observations and forecasts, or a private weather provider like WSI, which also supplies aviation-focused forecasts and data. The key point is flexibility: one solid source can be enough, and you’re not restricted to using both at once.

Relying on both as mandatory would be too restrictive, since pilots and dispatchers often choose the source that best fits their tools and workflow. FAA weather desk is a real channel, but it isn’t the sole weather information source pilots use, and METAR reports alone only give current observations, not the forecasts or broader data you typically need for trip planning.