diff --git a/scripts/exregional_run_post.sh b/scripts/exregional_run_post.sh
index 253f5eef7..c98bcf88d 100755
--- a/scripts/exregional_run_post.sh
+++ b/scripts/exregional_run_post.sh
@@ -194,6 +194,7 @@ cat > itag <<EOF
  grib='grib2'
  DateStr='${post_yyyy}-${post_mm}-${post_dd}_${post_hh}:00:00'
  MODELNAME='${POST_FULL_MODEL_NAME}'
+ SUBMODELNAME='${POST_SUB_MODEL_NAME}'
  fileNameFlux='${phy_file}'
  fileNameFlat='postxconfig-NT.txt'
 /
diff --git a/ush/config.sh.RTMA_CONUS_3km b/ush/config.sh.RTMA_CONUS_3km
index 66e5cf386..407196792 100644
--- a/ush/config.sh.RTMA_CONUS_3km
+++ b/ush/config.sh.RTMA_CONUS_3km
@@ -184,7 +184,8 @@ USE_CUSTOM_POST_CONFIG_FILE="TRUE"
 TESTBED_FIELDS_FN="testbed_fields_rtma.txt"
 CUSTOM_POST_CONFIG_FP="$(cd "$( dirname "${BASH_SOURCE[0]}" )/.." &>/dev/null&&pwd)/fix/upp/postxconfig-NT-fv3lam_rrfs.txt"
 CUSTOM_POST_PARAMS_FP="$(cd "$( dirname "${BASH_SOURCE[0]}" )/.." &>/dev/null&&pwd)/fix/upp/params_grib2_tbl_new"
-POST_FULL_MODEL_NAME="FV3RRTMA"
+POST_FULL_MODEL_NAME="FV3R"
+POST_SUB_MODEL_NAME="RTMA"
 ARCHIVEDIR="/5year/BMC/wrfruc/rtma_dev1"
 NCARG_ROOT="/apps/ncl/6.5.0-CentOS6.10_64bit_nodap_gnu447"
 NCL_HOME="/home/rtrr/RTMA/graphics"
diff --git a/ush/config.sh.RTMA_NA_3km b/ush/config.sh.RTMA_NA_3km
index b50d6cb15..b64333066 100644
--- a/ush/config.sh.RTMA_NA_3km
+++ b/ush/config.sh.RTMA_NA_3km
@@ -189,7 +189,8 @@ USE_CUSTOM_POST_CONFIG_FILE="TRUE"
 TESTBED_FIELDS_FN="testbed_fields_rtma.txt"
 CUSTOM_POST_CONFIG_FP="$(cd "$( dirname "${BASH_SOURCE[0]}" )/.." &>/dev/null&&pwd)/fix/upp/postxconfig-NT-fv3lam_rrfs.txt"
 CUSTOM_POST_PARAMS_FP="$(cd "$( dirname "${BASH_SOURCE[0]}" )/.." &>/dev/null&&pwd)/fix/upp/params_grib2_tbl_new"
-POST_FULL_MODEL_NAME="FV3RRTMA"
+POST_FULL_MODEL_NAME="FV3R"
+POST_SUB_MODEL_NAME="RTMA"
 ARCHIVEDIR="/5year/BMC/wrfruc/rtma_na_3km_dev1"
 NCARG_ROOT="/apps/ncl/6.5.0-CentOS6.10_64bit_nodap_gnu447"
 NCL_HOME="/home/rtrr/RTMA/graphics"
diff --git a/ush/config_defaults.sh b/ush/config_defaults.sh
index ed5a5c31e..31f69f7bc 100644
--- a/ush/config_defaults.sh
+++ b/ush/config_defaults.sh
@@ -1677,6 +1677,9 @@ ADDNL_OUTPUT_GRIDS=( )
 # POST_FULL_MODEL_NAME
 # The full module name required by UPP and set in the itag file
 #
+# POST_SUB_MODEL_NAME
+# The SUB module name required by UPP and set in the itag file
+#
 # TESTBED_FIELDS_FN
 # The file which lists grib2 fields to be extracted to bgsfc for testbed
 # Empty string means no need to generate bgsfc for testbed
@@ -1687,6 +1690,7 @@ USE_CUSTOM_POST_CONFIG_FILE="FALSE"
 CUSTOM_POST_CONFIG_FP=""
 CUSTOM_POST_PARAMS_FP=""
 POST_FULL_MODEL_NAME="FV3R"
+POST_SUB_MODEL_NAME="NONE"
 TESTBED_FIELDS_FN=""
 #
 #-----------------------------------------------------------------------