What is the bottom of the lowest overcast layer according to the pilot report sampling at FL085?

In a pilot report (PIREPs), the information gathered concerning cloud layers, including overcast conditions, is vital for understanding atmospheric conditions during flight. When a pilot reports the lowest overcast layer at a certain flight level, it indicates the height at which that layer starts.

In this scenario, 'FL085' refers to Flight Level 085, which equates to an altitude of approximately 8,500 feet above mean sea level. If the pilot report indicates that the bottom of the lowest overcast layer is at 6,500 feet, this means that the cloud cover begins at that altitude, which is consistent with the flight level described.

Understanding the relationship between flight levels and altitudes is essential, as it informs pilots about the vertical extent of cloud cover, visibility, and the weather conditions they may encounter. This context helps ensure safe navigation and decision-making in varying weather scenarios. The other altitude options do not align with the reported observations from the pilot at FL085, making the height of 6,500 feet the accurate choice for the bottom of the lowest overcast layer in this context.