What will be an evaluation of sensor data gathered during the 30-minute period ending at the actual time of the observation?

• A. Automated Observations
• B. Sky condition
• C. Automated observation
• D. Automated observation, sky condition

Answer: (D)

The test is asking about what the automated system evaluates using sensor data from the 30 minutes leading up to the exact moment of the observation. In automated weather reporting, readings from sensors are processed to produce an automated observation, which captures the measured values like temperature, dew point, wind, visibility, etc. At the same time, the system evaluates the sky condition—the cloud cover and heights—based on sensor data and the observation moment. Because both the automated measurements and the sky condition are determined from that 30-minute data window and reported together, the correct characterization is that the evaluation includes both automated observation data and sky condition. The other options are incomplete because they cover only one part of what’s produced in the final observation.