What does 'OVC' stand for in aviation weather reports?

In aviation weather reports, 'OVC' stands for overcast clouds. This term indicates a cloud cover condition where the sky is completely covered by clouds, which is critical information for pilots and air traffic controllers. Overcast conditions can significantly affect visibility, aircraft performance, and the decisions made regarding take-offs, landings, and flight routes. The presence of overcast clouds often prompts pilots to consider their approach and landing strategies, especially in relation to minimum visibility requirements.

The other options do not accurately reflect the standard terminology used in aviation weather reporting. Observations being canceled, overhead visibility, and overland conditions do not have specific meanings associated with the abbreviation 'OVC' in the context of weather reports, making them incorrect in this situation. Therefore, understanding that 'OVC' specifically refers to overcast clouds is essential for interpreting aviation weather reports effectively.