How does the format of TAF differ from METAR?

The correct answer highlights that TAF (Terminal Aerodrome Forecast) is specifically structured for forecast information, which distinguishes it from METAR (Meteorological Aerodrome Report). TAF provides a forecast of expected weather conditions for a specific aerodrome over a defined period, typically 24 or 30 hours, and includes details such as wind direction and speed, visibility, weather phenomena, and expected changes. This is fundamentally different from the METAR, which reports current weather conditions as they are observed at a given time, including factors like temperature, wind, and visibility.

The emphasis on forecast information in TAF is crucial for pilots and aviation personnel who need to anticipate weather changes during flight planning. Unlike TAF, METAR does not project future conditions, making it clear that the purpose and utility of the two reports are quite different.