Originally had this on Povrly, CZ. Lots of fog when there is none in Povrly, last check we did was 69% which is a good size wall of fog.

Set this to my home town so I can visually monitor the fog from my window. One server acting normal, the other with 100% fog and the weather api shows "visibility":16093. No fog where I currently live despite having fog on the servers.

The only way I can figure how the mod is pull fog from the api is if you put in the url you get when you sign up with the x's replacing city/town+county then appid like so...

http://api.openweathermap.org/data/2.5/weather?q=x,x&APPID=x

...I see a "visibility" parameter in there. When we had the 69% fog there was 10000 visibility or higher. In-game it was maybe ~100 meters of visibility then a wall of fog.