The snow i created was only a test to see what i could make mir do. The current weather system i'm working on will be differant from how the snow worked so there will be an opition to turn it on and off on w/e maps you want. The weather types i'm working on atm are snow, rain, fog, wind and storm.
Weather effects aren't too hard to make, TD's files are very flexable and allow alot of things that most owners over look by thinking, "ohh there's no direct option todo something, it can't be done".
Remember the only limits are your imagination.