@idefix37
Ok, in this pictures I know that the air is stable because the Yellow line is at the left of the Red line, so the particel that goes up is more cooler than the enviroment.
In the Stuven diagram of Windy, I don't understand!!!!
The grey line is ever on the right of the red one, so I understand that the air is ever unstable!!!

@yves70
In this example of today, here I know that the day is stable, but I don't know in the diagram how you understand it. This Stuven diagram I don't understand, the Skew-T I understand

@idefix37 Thanks but I still don't understand. How do I know if the air is stable or unstable?

Hi! How do you read Sounding forecast for stabiliy or unstability of air? I don't understand the two grey lines. Please explain me with examples