You name. And to be honest, none of my fancy weather addons would work without FSUIPC helping it. Well, thanks to the 'funny' FSX (and P3D) weather system and some rather sensible addon planes of course.

The way weather gets injected into FSX and the instant switch of winds and temps is something unique. With small planes flying low, one just goes yikes! at times  :D but seeing the addon stuff flying S-turns over straight lines or just getting into engine trouble because the weather decided to flip to 12°C warmer withing a nanosecond is more than yikes!  ;D