How long is a Terminal Aerodrome Forecast (TAF) valid for?

A Terminal Aerodrome Forecast (TAF) is valid for a maximum of 30 hours. TAFs provide essential weather conditions expected at an airport terminal, including visibility, wind, and significant weather phenomena, and are issued at regular intervals. The 30-hour validity allows pilots and operators to plan their flights with a reliable forecast, particularly when considering longer flights or events that may affect operations. This forecast is critical for ensuring the safety and operational efficiency of flights, especially in varying weather conditions.

The other options suggest shorter validity periods, which do not align with the standard practice of issuing TAFs. While METARs (aviation routine weather reports) are updated more frequently with current weather information, TAFs are specifically designed to provide a longer-term forecast for operational planning.