I have a bug with CJ4 weather radar which seems inverted.
Exemple : I have rain on my left side (east) but it’s show right side (west) in weather radar O_o
The radar is displayed as if it comes from the north. Pay attention and you will see it move from north to south, no matter which direction you are actually headed. As I almost always use auto pilot, I set my heading bug to north so I can easily interpret the radar. Rain that you are flying to is to the north.