For Events that are established by visual effects like Sandstorm, Snowstorm, etc., we currently can only use the post process effect "color correction".
While it can be used to cover the most basics situations, a more dynamic and flexible adaptation of the fog simulation and the color of it would provide more oportunities.

Since the core engine already seems supports customized fog, defined via a Terrains CfgWorld (afaik), it would be amazing if this could be controlled dynamically via sqf commands, therefore i would like to suggest the following command(s).

time setFogColor rgbA

time: Number - transition time to the new values
rgbA: Array of RGBA Numbers - like the config entry "fogColor[]"