During a report, when should measurements of high visibility be prioritized?

Prioritizing measurements of high visibility is critical during situations when runway visual ranges are below minimums. This is because low visibility directly impacts a pilot's ability to take off, land, and maneuver safely around an airport. In such conditions, precise visibility data is essential for ensuring that flight operations can continue safely and that pilots have the information necessary to make informed decisions.

During low traffic times, while it may seem that monitoring visibility is less critical, the safety of each flight is always paramount, regardless of the traffic level. Approaching thunderstorms certainly demands attention, but the immediate priority remains on the visibility for both pilot safety and operational efficiency, even if thunderstorm conditions can also complicate visibility. Clear sky conditions typically mean good visibility is present, thus making measurements less critical in terms of immediate safety concerns.

In summary, prioritizing visibility measurements when runway visual ranges are below minimums is essential for maintaining safety in aviation operations, as inadequate visibility can significantly increase the risks involved in flying.