What is the function of the Aviation Routine Weather Report (METAR)?

The Aviation Routine Weather Report, commonly known as a METAR, serves the essential purpose of delivering hourly reports on current surface weather conditions at airports and other locations. These reports contain vital information such as wind speed and direction, visibility, precipitation, temperature, dew point, and any significant weather phenomena that may be occurring. Pilots and other aviation personnel rely on METARs for real-time updates to make informed decisions regarding flight operations, safety, and planning.

In contrast, long-term weather forecasts are typically provided by different reports or services, and are not the role of a METAR. Additionally, while pilot training is important, METARs do not assist directly with training regulations. Reporting traffic patterns is a function associated with air traffic control communications rather than weather reporting. Thus, the primary function of a METAR is to provide immediate, accurate, and localized weather information essential for flight safety and operational effectiveness.