diff --git a/parm/config/config.base.emc.dyn b/parm/config/config.base.emc.dyn
index fc021271062..348f6c1f84e 100755
--- a/parm/config/config.base.emc.dyn
+++ b/parm/config/config.base.emc.dyn
@@ -367,6 +367,9 @@ export MAKE_ACFTBUFR="@MAKE_ACFTBUFR@"
 # Analysis increments to zero in CALCINCEXEC
 export INCREMENTS_TO_ZERO="'liq_wat_inc','icmr_inc'"
 
+# Write analysis files for early cycle EnKF 
+export DO_CALC_INCREMENT_ENKF_GFS="YES"
+
 # Stratospheric increments to zero
 export INCVARS_ZERO_STRAT="'sphum_inc','liq_wat_inc','icmr_inc'"
 export INCVARS_EFOLD="5"
diff --git a/scripts/exgdas_enkf_ecen.sh b/scripts/exgdas_enkf_ecen.sh
index a5603eee6a1..32aed709c5e 100755
--- a/scripts/exgdas_enkf_ecen.sh
+++ b/scripts/exgdas_enkf_ecen.sh
@@ -24,6 +24,7 @@ pwd=$(pwd)
 
 # Base variables
 CDATE=${CDATE:-"2010010100"}
+CDUMP=${CDUMP:-"gdas"}
 DONST=${DONST:-"NO"}
 export CASE=${CASE:-384}
 ntiles=${ntiles:-6}
@@ -60,8 +61,11 @@ FHMIN=${FHMIN_ECEN:-3}
 FHMAX=${FHMAX_ECEN:-9}
 FHOUT=${FHOUT_ECEN:-3}
 FHSFC=${FHSFC_ECEN:-$FHMIN}
-DO_CALC_INCREMENT=${DO_CALC_INCREMENT:-"NO"}
-
+if [ $CDUMP = "gfs" ]; then
+   DO_CALC_INCREMENT=${DO_CALC_INCREMENT_ENKF_GFS:-"NO"}
+else
+   DO_CALC_INCREMENT=${DO_CALC_INCREMENT:-"NO"}
+fi
 
 # global_chgres stuff
 CHGRESNEMS=${CHGRESNEMS:-$HOMEgfs/exec/enkf_chgres_recenter.x}
@@ -328,8 +332,7 @@ if [ $DO_CALC_INCREMENT = "YES" ]; then
    . prep_step
 
    $NCP $CALCINCEXEC $DATA
-
-   rm calc_increment.nml
+   [[ -f calc_increment.nml ]] && rm calc_increment.nml
    cat > calc_increment.nml << EOF
 &setup
   datapath = './'
diff --git a/scripts/exgdas_enkf_update.sh b/scripts/exgdas_enkf_update.sh
index daba9b83f82..b22dcbfea86 100755
--- a/scripts/exgdas_enkf_update.sh
+++ b/scripts/exgdas_enkf_update.sh
@@ -41,6 +41,7 @@ ENKFEXEC=${ENKFEXEC:-$HOMEgfs/exec/enkf.x}
 
 # Cycling and forecast hour specific parameters
 CDATE=${CDATE:-"2001010100"}
+CDUMP=${CDUMP:-"gdas"}
 
 # Filenames.
 GPREFIX=${GPREFIX:-""}
@@ -83,7 +84,11 @@ cnvw_option=${cnvw_option:-".false."}
 netcdf_diag=${netcdf_diag:-".true."}
 modelspace_vloc=${modelspace_vloc:-".false."} # if true, 'vlocal_eig.dat' is needed
 IAUFHRS_ENKF=${IAUFHRS_ENKF:-6}
-DO_CALC_INCREMENT=${DO_CALC_INCREMENT:-"NO"}
+if [ $CDUMP = "gfs" ]; then
+   DO_CALC_INCREMENT=${DO_CALC_INCREMENT_ENKF_GFS:-"NO"}
+else
+   DO_CALC_INCREMENT=${DO_CALC_INCREMENT:-"NO"}
+fi
 INCREMENTS_TO_ZERO=${INCREMENTS_TO_ZERO:-"'NONE'"}
 
 ################################################################################
@@ -94,11 +99,11 @@ LEVS_ENKF=${LEVS_ENKF:-$($NCLEN $ATMGES_ENSMEAN pfull)} # get LEVS_ENFK
 use_gfs_ncio=".true."
 use_gfs_nemsio=".false."
 paranc=${paranc:-".true."}
+WRITE_INCR_ZERO="incvars_to_zero= $INCREMENTS_TO_ZERO,"
 if [ $DO_CALC_INCREMENT = "YES" ]; then
    write_fv3_incr=".false." 
 else
    write_fv3_incr=".true."
-   WRITE_INCR_ZERO="incvars_to_zero= $INCREMENTS_TO_ZERO,"
 fi
 LATA_ENKF=${LATA_ENKF:-$LATB_ENKF}
 LONA_ENKF=${LONA_ENKF:-$LONB_ENKF}