A METAR indicates the weather at what specific time frame?

A METAR is an aviation routine weather report that provides current meteorological conditions at an airport or aerodrome. It is always issued at a specified time, typically every hour, reflecting the weather conditions observed at that particular moment. This means that the data in a METAR report is not reflective of conditions over a longer period, but is a snapshot of the weather at a specific hour.

The emphasis on a specified time is crucial for pilots and aviation personnel, as it allows them to understand the current conditions, including temperature, wind direction and speed, visibility, and significant weather phenomena. This timely information is critical for flight planning and operational safety.

Other options may suggest different time frames or duration, which does not align with the nature of METAR reports. Therefore, the indication of a specified time is essential to comprehend the report's context and relevance for aviation operations.