Finding rainfall rate from WRF output

[byrdman1982]

Aloha WRF people,

I have hourly WRF output that I am generating using ARW post. I am trying to get the rainfall rate at each of my time steps (not the total accumulated rainfall). I only have access to the output, so I can't change the WRF registry to get the rainfall rate that way, all I can do is use the GrADS output. Does anyone have a way for finding the rainfall rate at a specific time from the WRF output?

Thanks,
Tom