According to the user guide:
"Cloud base: Cloud base height is the altitude of the lowest cloud base above the ground, especially important for pilots. The model of terrain is simplified, so be cautious to use these values in the mountains. On large areas, the forecast model is not able to calculate the cloud base."
I'm curious how the simplified the terrain elevation is calculated and what parameters determine the cloud base over the mountains. Does anyone know if it is a mean or average over an area? ie mean elevation over 5 square miles, or maybe the lowest elevation over a set area?
We do use windy as a data point for flying in the mountains and that data would help interpreting the forecast