@Jezzder:
I did a little more playing around with it this evening. Changed the map to more similar throughout.
This time, the longer I flew, the better the weather got (I went back to a place i had been before where the weather was 3500ft overcast ceilings and 6nm vis, and it became 6000ft broken ceilings with unlimited vis under the cloud deck).
I’ve attached the TE, with the weather file I made this evening. I made sure “map updates” was not checked, so i’m not sure why weather is changing with time.
I must be missing something…
First check your wind map shift value
Then when you transition from a cell to another , there is an time interpolation as well to smooth the transition