HaloMods "Classic" Read-only Archive

I am making a desert map and would like to make sand blow around in the wind if possible. Does anyone know how to make this? I think it might be done with the particle system in wind.

Yes, very strong wind and particles.

But what exactly do I do to make the particles?
If i click the "..." next to particle system it shows that i need a *.weather_particle_system. This can be made in Guerilla but im not sure how to make it.