Which report provides forecasted weather conditions at an airport for a specified period?

The TAF, or Terminal Aerodrome Forecast, is specifically designed to provide forecasted weather conditions for airports over a defined period, typically covering 24 to 30 hours. It aims to assist pilots and flight planners in understanding expected weather phenomena, including wind direction and speed, visibility, significant weather events, and cloud cover. The TAF reports are produced four times a day and can include details on expected changes in weather conditions, making it a critical tool for assessing flight safety.

In contrast, METAR reports provide current weather observations, reflecting the actual weather at the moment of issuance, and are not focused on forecasts. SPECI reports are special weather reports issued when significant weather changes occur that might affect the flying conditions, but they also do not provide forecasts. AWOS, or Automated Weather Observing System, is a system that provides real-time weather data and does not generate forecasts. Thus, the TAF is the correct choice as it explicitly serves the purpose of conveying future weather forecasts for airports.