dset ^lpw%y4_L1_mon.grd
undef -999.9
title NVAP Layerd Water vapor  Jan 1988 
options template yrev
*format yrev
XDEF  144 LINEAR   1.25  2.5
YDEF  72  LINEAR  -88.75 2.5
zdef     1 levels sfc_700 
tdef 144  linear               12Z01JAN1988      1mon
vars    1
lpw1      1 212,8,0 total precipitable water (mm)                   
endvars