What is the maximum height for communication regarding unforecasted weather?

In aviation operations, it is essential to ensure that pilots can communicate effectively with Air Traffic Control (ATC) regarding any unforecasted weather they encounter, irrespective of altitude. Allowing communication at all heights ensures that pilots can report critical safety information and changes in weather conditions that may affect their flight, regardless of whether they are operating below or above traditional altitude thresholds.

This flexibility is beneficial for situational awareness and enhances safety, as unforecasted weather phenomena could develop at various altitudes and may pose significant risks to flight operations. Thus, when it comes to pilots needing to make reports about such weather, there are no restrictions on altitude, allowing for comprehensive communication in real-time, which is vital for operational safety.