Final answer:
METAR reports provide detailed information about current weather conditions at specific times.
Step-by-step explanation:
The METAR observations taken at 0300, 0900, 1500, and 2100 UTC are known as METAR reports. These reports offer detailed information about the current weather conditions at a specific location. They provide information such as temperature, dew point, wind speed and direction, visibility, cloud cover, and any significant weather phenomena.