Hi, 
I have used registered FSUIPC 3.48 for some time now. For the weather I am using FSMeteo. Everything has worked perfectly last 3-4 months.  
In the beginning I recall setting some values (especially wind smoothening), but since I have been more or less happy I can't exactly remember settings I have been using. 
Now suddenly I get only all grey, foggy environment with maybe 5-6 NM visibility. And this is during clear weather (CAVOK).  
I have tried everything (reset all fsuipc settings, changing smoothing options...) to solve the problem - however it does not go away and I have run out of ideas how to solve the issue. 
Any idea where problem lies.  I did update my BIOS (mobo) this week but no problems there. 
Best Rgs 
           \\ Perttu