This command changes the game's weather to the specified weather type.
forceweather [weather id]
|Weather ID||The ID of the weather type you wish to force. See weather IDs.|
Foggy weather has an ID of 0010A23E. The above command would set the current weather foggy. For more IDs see our weather ID list.
The FW command is an alias of ForceWeather - it has the same function.