* This is a GrADS descriptor file for NCEP GRIB2 file downloaded from: * ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gens/prod/gefs.yyyymmdd/hh/pgrb2alr/ * * N.B. In this example descriptor file, the NCEP grib2 file name is changed * from: * geENS.tHHz.pgrb2af* * (the filename on the NCEP FTP server) * to: * gfsens.ENS.yyyymmddhh.fff.2p5.grib2 * (a filename that includes initialization date, forecast hour, and ensemble name) * * where: * yyyy is the initialization year * mm is the initialization month * dd is the initialization day * HH is the initialization hour * ENS is the ensemble name * dset /your_path_name_here/gfsens.%e.%iy4%im2%id2%ih2.%f3.2p5.grib2 dtype grib2 title NCEP 5D Ensemble Forecast in GRIB2 on a 2.5-degree grid index ^gfsens.map options template pascals undef -9.99e33 xdef 144 linear 0.0 2.5 ydef 73 linear -90.0 2.5 zdef 7 levels 100000 92500 85000 70000 50000 25000 20000 tdef 65 linear 12z24jan08 6hr edef 21 *name length initialtime <type,pert or deriv> c00 65 12z24jan08 1,0 p01 65 12z24jan08 3,1 p02 65 12z24jan08 3,2 p03 65 12z24jan08 3,3 p04 65 12z24jan08 3,4 p05 65 12z24jan08 3,5 p06 65 12z24jan08 3,6 p07 65 12z24jan08 3,7 p08 65 12z24jan08 3,8 p09 65 12z24jan08 3,9 p10 65 12z24jan08 3,10 p11 65 12z24jan08 3,11 p12 65 12z24jan08 3,12 p13 65 12z24jan08 3,13 p14 65 12z24jan08 3,14 p15 65 12z24jan08 3,15 p16 65 12z24jan08 3,16 p17 65 12z24jan08 3,17 p18 65 12z24jan08 3,18 p19 65 12z24jan08 3,19 p20 65 12z24jan08 3,20 endedef vars 22 hgt 7,100 0,3,5 Geopotential Height [gpm] tmp 7,100 0,0,0 Temperature [K] rh 7,100 0,1,1 Relative Humidity [%] u 7,100 0,2,2 U-Component of Wind [m/s] v 7,100 0,2,3 V-Component of Wind [m/s] * these surface vars valid at initial time only zs 0,1,0 0,3,5 Surface Geopotential Height [gmp] * these surface vars valid at all times ps 0,1,0 0,3,0 Surface Pressure [Pa] pwat 0,200,0 0,1,3 Precipitable Water [kg/m^2] cape 0,108,18000,0 0,7,6 CAPE, 180-0 mb above ground [J/kg] slp 0,101,0 0,3,1 Mean Sea Level Pressure [Pa] t2 0,103,2 0,0,0 2-meter Temperature [K] rh2m 0,103,2 0,1,1 2-meter Relative Humidity [%] u10 0,103,10 0,2,2 10-meter U-Component of Wind [m/s] v10 0,103,10 0,2,3 10-meter V-Component of Wind [m/s] * these surface vars valid at forecast times only t2max 0,103,2 0,0,4,2 2-meter Maximum Temperature [K] t2min 0,103,2 0,0,5,3 2-meter Minimum Temperature [K] tc 0,200,0 0,6,1,0 Total Cloud Cover [%] p 0,1,0 0,1,8,1 Accumulated Precipitation [kg/m^2] crain 0,1,0 0,1,192,0 Categorical Rain (yes=1; no=0) cfrzr 0,1,0 0,1,193,0 Categorical Freezing Rain (yes=1; no=0) cicep 0,1,0 0,1,194,0 Categorical Ice Pellets (yes=1; no=0) csnow 0,1,0 0,1,195,0 Categorical Snow (yes=1; no=0) endvars
