Here earlier i was asked about weather control posted at Madx.dk
I get asked about structures quite often and i get a bit tired of comming up with the same story every time so anyway here it is.
Alot have changed since I documented the structure of the weather controller but for thoes interested you can find the sub-weather variables at:
0x0122D99C (pointer)
The first one being intensity.
If you are interested in weather types take a look at the EMU source codes.