Shinji
If you value your weather in FS, can I humbly suggest purchasing one of the add-on weather engines for FS?
I used to use FS-Meteo; not terribly expensive and current enough for most purposes, but I have now gone over to ActiveSky 5 Enhanced; more expensive, but they run their own network of METAR data servers (so when IVAO's METAR servers go down, I still have real-world weather) and the new cloud textures it gives are truely spectacular (have a couple of non-EHM screenshots taken during the IVAO VFR WT that demonstrate this beautifully)