I took these screenies of FS2000 (hoping to get 2004 this x-mas) and edited them, showing a tornado striking chicago. I made 2 of them, because I figured that I was supposed to include my airplane in it, so there are 2.

From the air. My plane's that white stripe in the center of the screen.


And from just outside my PlutoCon.


For multiple lightning, I simply put dozens of tiny t-storm layers close together. Hopefully, I'll get to do that in FS2004 as well.

EDIT: Are these sort of images unwelcome here?

Great edit!