Amazing Storm Demo
Some pretty awesome storms can be generated combining a few different mods together. Check it out:
Cinematic Realism ReShade V2 by Steamin661
http://www.nexusmods.com/witcher3/mods/2188/?
Super Turbo Lighting Mod 2.2.1 by Essenthy
http://www.moddb.com/mods/super-turbo-lighting-mod/downloads/stlm-221
Pollens by KEEPER
http://www.nexusmods.com/witcher3/mods/2026/?
Volumetric clouds over Skellige by GMSBSGhost
http://www.nexusmods.com/witcher3/mods/1302/?
WEATHER by ramccoid
http://www.nexusmods.com/witcher3/mods/751/?