PW    | | |Precipitable Water|in|CONTOUR,IMAGE,OTHER|Layer,BLyr,900-700mb,700-300mb| \
      *Alias,Layer|PW,Surface|   \
      *Alias,Layer|PW,0SIG-100SIG|   \
      *Alias|TPW|   \
      *Alias,SREF212|PWmean
EPT | more | \
      *Alias|EPOT