How does UPP calculate low and high cloud amounts for WRF files

Hi wonderful UPP help


At present, I use UPP to do researches on clouds. I use UPP to calculate low clouds and high clouds cover output by WRF model, and I want to know how these two variables are defined in UPP. 


Thank you vey much 

There is a FAQ on the 'UPP for WRF' Forum, but it is down for maintenance, so I am not sure the link will work until it is back up

Here are the definitions in case it does not work:

The cloud layers for WRF are defined by:
Low: ≥ 642 hPa
Mid: ≥ 350 hPa
High: <350 hPa