wgne generation for gfs post processing only (#563)

ush/fv3gfs_downstream_nems.sh

@@ -31,6 +31,8 @@ set -x
 #  1. Modify sea icea cover via land-sea mask.
 #-Wen Meng, April 2022
 #  1. Add wgne dataset generation from f000 to f180 at 3-hour interval.
+#-Wen Meng, Sep. 2022
+#  1. wgne generation for gfs post processing only.
 #-----------------------------------------------------------------------
 
 
@@ -264,7 +266,7 @@ date
         cp pgbfile_${fhr3}_1p0    $COMOUT/${PREFIX}pgrb.1p00.f${fhr3}
         $GRBINDEX $COMOUT/${PREFIX}pgrb.1p00.f${fhr3} $COMOUT/${PREFIX}pgrb.1p00.f${fhr3}.idx
       fi
-      if [ $fhr3 -gt 0 -a $fhr3 -le 180 ]; then
+      if [ $fhr3 -gt 0 -a $fhr3 -le 180 -a "$RUN" = "gfs" ]; then
         $WGRIB2 pgb2file_${fhr3}_0p25 -d 597 -grib $COMOUT/${PREFIX}wgne.f${fhr3}
       fi
     fi