Weather Effects

I am trying to make a sky wars map, where everything is flying (similar to battleships... but in the air). I would like to add lots of fog and wind to make it look like you are in the clouds. When I try to do this however, the weather effects do not stack and seem to cancel eachother out. I also cannot get the fog to show up at all. I tried to use triggers to make the fog more dense... but it didn't do anything. Can anyone help me?

I had the exact same problem a long time ago and it's never solved... maybe that it will be this time.

Ok now I am using terrain fog, but having problems. The numbers make no sense to me, but it seems to go like this: If they are set high enough, no fog, if they are set low enough, way too much fog. There is no in-between!

EDIT: HA! I DID IT! Only took two hours... lol. Look for a future map called Sky Wars! (Note: I'm doing triggers and stuff, my brother is doing the map. So don't hate me if the map sucks!)