diff --git a/.github/PULL_REQUEST_TEMPLATE b/.github/PULL_REQUEST_TEMPLATE
index 1ebf80966c..32d71f1220 100644
--- a/.github/PULL_REQUEST_TEMPLATE
+++ b/.github/PULL_REQUEST_TEMPLATE
@@ -13,6 +13,7 @@
 - [ ] WCOSS2
 - [ ] Hera
 - [ ] Orion
+- [ ] Hercules
 - [ ] Jet
 
 - Test cases: 
diff --git a/README.md b/README.md
index 42ce155293..7066769c10 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ The above command is equal to:
 ./manage_externals/checkout_externals
 ./app_build.sh -p=[machine]
 ```
-where `[machine]` is `wcoss2`, `hera`, `jet`, or `orion`.
+where `[machine]` is `wcoss2`, `hera`, `jet`, `orion`, or `hercules`.
 
 4. Move to the home directory (rrfs-workflow):
 ```
diff --git a/doc/UsersGuide/source/Quickstart.rst b/doc/UsersGuide/source/Quickstart.rst
index 4d96426877..108bb5d2fd 100644
--- a/doc/UsersGuide/source/Quickstart.rst
+++ b/doc/UsersGuide/source/Quickstart.rst
@@ -37,7 +37,7 @@ Building RRFS workflow
             
          ./app_build.sh --platform=<machine>
 
-      where ``<machine>`` is ``wcoss2``, ``hera``, ``jet``, or ``orion``.
+      where ``<machine>`` is ``wcoss2``, ``hera``, ``jet``, ``orion``, or ``hercules``.
 
    #. Move to the home directory (rrfs-workflow):
 
@@ -58,7 +58,7 @@ Engineering Test: Non-DA
          module use modulefiles
          module load wflow_wcoss2
 
-      * On Hera | Jet | Orion:
+      * On Hera | Jet | Orion | Hercules:
 
       .. code-block:: console
          
@@ -66,7 +66,7 @@ Engineering Test: Non-DA
          module load wflow_<machine>
          conda activate workflow_tools
 
-      where ``<machine>`` is ``hera``, ``jet``, or ``orion``. 
+      where ``<machine>`` is ``hera``, ``jet``, ``orion``, or ``hercules``.
 
    #. Copy the pre-defined configuration file: 
 
@@ -75,7 +75,7 @@ Engineering Test: Non-DA
          cd ush
          cp sample_configs/non-DA_eng/config.nonDA.<format>.<machine>.sh config.sh
       
-      where ``<format>`` is ``grib2`` or ``netcdf``, and ``<machine>`` is ``wcoss2``, ``hera``, ``jet``, or ``orion``. Note that you may need to change ``ACCOUNT``, ``STMP``, or ``PTMP`` in the configuration file ``config.sh``.
+      where ``<format>`` is ``grib2`` or ``netcdf``, and ``<machine>`` is ``wcoss2``, ``hera``, ``jet``, ``orion``, or ``hercules``. Note that you may need to change ``ACCOUNT``, ``STMP``, or ``PTMP`` in the configuration file ``config.sh``.
 
    #. Generate the experiment workflow:
 
@@ -112,7 +112,7 @@ Engineering Test: DA
          module use modulefiles
          module load wflow_wcoss2
 
-      * On Hera | Jet | Orion:
+      * On Hera | Jet | Orion | Hercules :
 
       .. code-block:: console
          
@@ -120,7 +120,7 @@ Engineering Test: DA
          module load wflow_<machine>
          conda activate workflow_tools
 
-      where ``<machine>`` is ``hera``, ``jet``, or ``orion``. 
+      where ``<machine>`` is ``hera``, ``jet``, ``orion``, or ``hercules``. 
 
    #. Copy the pre-defined configuration file: 
 
diff --git a/modulefiles/build_hercules_intel.lua b/modulefiles/build_hercules_intel.lua
new file mode 100644
index 0000000000..8482cfdaeb
--- /dev/null
+++ b/modulefiles/build_hercules_intel.lua
@@ -0,0 +1,65 @@
+help([[
+This module loads libraries for building the RRFS workflow on
+the MSU machine Hercules using Intel-2021.9.0
+]])
+
+whatis([===[Loads libraries needed for building the RRFS worfklow on Hercules ]===])
+
+load("contrib")
+load("noaatools")
+
+prepend_path("MODULEPATH","/work/noaa/epic/role-epic/spack-stack/hercules/spack-stack-1.5.0/envs/unified-env/install/modulefiles/Core")
+load(pathJoin("stack-intel", os.getenv("stack_intel_ver") or "2021.9.0"))
+load(pathJoin("stack-intel-oneapi-mpi", os.getenv("stack_impi_ver") or "2021.9.0"))
+load("intel-oneapi-mkl/2022.2.1")
+load(pathJoin("cmake", os.getenv("cmake_ver") or "3.23.1"))
+
+load(pathJoin("jasper", os.getenv("jasper_ver") or "2.0.32"))
+load(pathJoin("libpng", os.getenv("libpng_ver") or "1.6.37"))
+load(pathJoin("parallelio", os.getenv("pio_ver") or "2.5.10"))
+--loading parallelio will load netcdf_c, netcdf_fortran, hdf5, zlib, etc
+load(pathJoin("esmf", os.getenv("esmf_ver") or "8.4.2"))
+load(pathJoin("fms", os.getenv("fms_ver") or "2023.01"))
+
+load(pathJoin("bacio", os.getenv("bacio_ver") or "2.4.1"))
+load(pathJoin("crtm", os.getenv("crtm_ver") or "2.4.0"))
+load(pathJoin("g2", os.getenv("g2_ver") or "3.4.5"))
+load(pathJoin("g2tmpl", os.getenv("g2tmpl_ver") or "1.10.2"))
+load(pathJoin("ip", os.getenv("ip_ver") or "4.3.0"))
+load(pathJoin("sp", os.getenv("sp_ver") or "2.3.3"))
+
+load(pathJoin("gftl-shared", os.getenv("gftl-shared_ver") or "1.5.0"))
+--load(pathJoin("yafyaml", os.getenv("yafyaml_ver") or "0.5.1"))
+load(pathJoin("mapl", os.getenv("mapl_ver") or "2.35.2-esmf-8.4.2"))
+load(pathJoin("scotch", os.getenv("scotch_ver") or "7.0.4"))
+
+--load(pathJoin("bufr", os.getenv("bufr_ver") or "12.0.0"))
+load(pathJoin("gfsio", os.getenv("gfsio_ver") or "1.4.1"))
+load(pathJoin("landsfcutil", os.getenv("landsfcutil_ver") or "2.4.1"))
+load(pathJoin("nemsiogfs", os.getenv("nemsiogfs_ver") or "2.5.3"))
+load(pathJoin("sigio", os.getenv("sigio_ver") or "2.3.2"))
+load(pathJoin("sfcio", os.getenv("sfcio_ver") or "1.4.1"))
+load(pathJoin("nemsio", os.getenv("nemsio_ver") or "2.5.4"))
+--load(pathJoin("wrf_io", os.getenv("wrf_io_ver") or "1.2.0"))
+load(pathJoin("ncio", os.getenv("ncio_ver") or "1.1.2"))
+load(pathJoin("gsi-ncdiag", os.getenv("gsi-ncdiag_ver") or "1.1.1"))
+load(pathJoin("w3emc", os.getenv("w3emc_ver") or "2.10.0"))
+load(pathJoin("w3nco", os.getenv("w3nco_ver") or "2.4.1"))
+
+load(pathJoin("nco", os.getenv("nco_ver") or "5.0.6"))
+--load(pathJoin("prod_util", os.getenv("prod_util_ver") or "2.0.14"))
+load(pathJoin("wgrib2", os.getenv("wgrib2_ver") or "3.1.1"))
+
+prepend_path("MODULEPATH", "/work/noaa/rtrr/gge/hercules/lua")
+load("prod_util/2.0.15")
+load("wrf_io/1.2.0a")
+load("bufr/11.7.0a")
+load("gsi-ncdiag/1.1.2a")
+
+unload("python/3.10.8")
+
+setenv("CMAKE_C_COMPILER","mpiicc")
+setenv("CMAKE_CXX_COMPILER","mpiicpc")
+setenv("CMAKE_Fortran_COMPILER","mpiifort")
+setenv("CMAKE_Platform","hercules.intel")
+setenv("I_MPI_EXTRA_FILESYSTEM","ON")
diff --git a/modulefiles/tasks/hercules/python_srw.lua b/modulefiles/tasks/hercules/python_srw.lua
new file mode 100644
index 0000000000..157e6884ea
--- /dev/null
+++ b/modulefiles/tasks/hercules/python_srw.lua
@@ -0,0 +1,5 @@
+unload("python")
+append_path("MODULEPATH","/work/noaa/epic/role-epic/contrib/hercules/miniconda3/modulefiles")
+load(pathJoin("miniconda3", os.getenv("miniconda3_ver") or "4.12.0"))
+
+setenv("SRW_ENV", "workflow_tools")
diff --git a/modulefiles/wflow_hercules.lua b/modulefiles/wflow_hercules.lua
new file mode 100644
index 0000000000..1be5fcb351
--- /dev/null
+++ b/modulefiles/wflow_hercules.lua
@@ -0,0 +1,27 @@
+help([[
+This module loads python environement for running RRFS workflow on
+the MSU machine Hercules
+]])
+
+whatis([===[Loads libraries needed for running RRFS workflow on Hercules ]===])
+
+load("contrib")
+load("rocoto")
+
+prepend_path("MODULEPATH","/work/noaa/epic/role-epic/spack-stack/hercules/spack-stack-1.5.0/envs/unified-env/install/modulefiles/Core")
+load(pathJoin("stack-intel", os.getenv("stack_intel_ver") or "2021.9.0"))
+load(pathJoin("stack-intel-oneapi-mpi", os.getenv("stack_impi_ver") or "2021.9.0"))
+load(pathJoin("crtm", os.getenv("crtm_ver") or "2.4.0"))
+
+load("wget")
+
+unload("python")
+append_path("MODULEPATH","/work/noaa/epic/role-epic/contrib/hercules/miniconda3/modulefiles")
+load(pathJoin("miniconda3", os.getenv("miniconda3_ver") or "4.12.0"))
+
+if mode() == "load" then
+   LmodMsgRaw([===[Please do the following to activate conda:
+       > conda activate workflow_tools
+]===])
+end
+
diff --git a/modulefiles/wflow_orion.lua b/modulefiles/wflow_orion.lua
index 0d2a8593be..b08e03f2cd 100644
--- a/modulefiles/wflow_orion.lua
+++ b/modulefiles/wflow_orion.lua
@@ -9,10 +9,9 @@ load("contrib")
 load("rocoto")
 load("wget")
 
-prepend_path("MODULEPATH","/work/noaa/epic/role-epic/contrib/orion/hpc-stack/intel-2022.1.2/modulefiles/stack")
-load(pathJoin("hpc", os.getenv("hpc_ver") or "1.2.0"))
-load(pathJoin("hpc-intel", os.getenv("hpc_intel_ver") or "2022.1.2"))
-load(pathJoin("hpc-impi", os.getenv("hpc_impi_ver") or "2022.1.2"))
+prepend_path("MODULEPATH","/work/noaa/epic/role-epic/spack-stack/orion/spack-stack-1.5.0/envs/unified-env/install/modulefiles/Core")
+load(pathJoin("stack-intel", os.getenv("stack_intel_ver") or "2022.0.2"))
+load(pathJoin("stack-intel-oneapi-mpi", os.getenv("stack_impi_ver") or "2021.5.1"))
 load(pathJoin("crtm", os.getenv("crtm_ver") or "2.4.0"))
 
 unload("python")
diff --git a/parm/FV3LAM_wflow.xml b/parm/FV3LAM_wflow.xml
index a22fb1f636..cf0ced6716 100644
--- a/parm/FV3LAM_wflow.xml
+++ b/parm/FV3LAM_wflow.xml
@@ -745,7 +745,7 @@ MODULES_RUN_TASK_FP script.
       {%- elif machine in ["JET"] %}
         <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H00.gdas.t@Hz.atmf00{{ extrn_mdl_ics_offset_hrs }}.#memNameGDAS#.nc</cyclestr></datadep>
         <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H00.gdas.t@Hz.sfcf00{{ extrn_mdl_ics_offset_hrs }}.#memNameGDAS#.nc</cyclestr></datadep>
-      {%- elif machine in ["ORION"] %}
+      {%- elif machine in ["ORION","HERCULES"] %}
         <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H00.gdas.t@Hz.atmf00{{ extrn_mdl_ics_offset_hrs }}.#memNameGDAS#.nc</cyclestr></datadep>
         <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H00.gdas.t@Hz.sfcf00{{ extrn_mdl_ics_offset_hrs }}.#memNameGDAS#.nc</cyclestr></datadep>
       {%- endif %}
@@ -757,7 +757,7 @@ MODULES_RUN_TASK_FP script.
       <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H000{{ "%03d" % extrn_mdl_ics_offset_hrs }}</cyclestr></datadep>
       {%- elif machine in ["HERA"] %}
       <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H000{{ "%03d" % extrn_mdl_ics_offset_hrs }}</cyclestr></datadep>
-      {%- elif machine in ["ORION"] %}
+      {%- elif machine in ["ORION","HERCULES"] %}
       <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_ics_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_ics }}/@y@j@H000{{ "%03d" % extrn_mdl_ics_offset_hrs }}</cyclestr></datadep>
       {%- endif %}
       {%- endif %}
@@ -866,7 +866,7 @@ MODULES_RUN_TASK_FP script.
          {%- elif machine in ["JET"] %}
           <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H00.gdas.t@Hz.atmf{{ "%03d" % h }}.#memNameGDAS#.nc</cyclestr></datadep>
           <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H00.gdas.t@Hz.sfcf{{ "%03d" % h }}.#memNameGDAS#.nc</cyclestr></datadep>
-         {%- elif machine in ["ORION"] %}
+         {%- elif machine in ["ORION","HERCULES"] %}
           <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H00.gdas.t@Hz.atmf{{ "%03d" % h }}.#memNameGDAS#.nc</cyclestr></datadep>
           <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H00.gdas.t@Hz.sfcf{{ "%03d" % h }}.#memNameGDAS#.nc</cyclestr></datadep>
          {%- endif %}
@@ -875,7 +875,7 @@ MODULES_RUN_TASK_FP script.
          <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H000{{ "%03d" % h }}</cyclestr></datadep>
          {%- elif machine in ["HERA"] %}
          <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H000{{ "%03d" % h }}</cyclestr></datadep>
-         {%- elif machine in ["ORION"] %}
+         {%- elif machine in ["ORION","HERCULES"] %}
          <datadep age="00:00:05:00"><cyclestr offset="-{{ extrn_mdl_lbcs_offset_hrs }}:00:00">{{ extrn_mdl_sysbasedir_lbcs }}/@y@j@H000{{ "%03d" % h }}</cyclestr></datadep>
          {%- endif %}
          {%- endif %}
@@ -919,7 +919,7 @@ MODULES_RUN_TASK_FP script.
          {%- for h in range(extrn_mdl_lbcs_offset_hrs, boundary_long_len_hrs+extrn_mdl_lbcs_offset_hrs+1, bc_update_interval) %}
          {%- if machine in ["WCOSS2"] %}
          <datadep age="00:00:05:00"><cyclestr>{{ extrn_mdl_sysbasedir_lbcs }}/gfs.@Y@m@d/@H/atmos/gfs.t@Hz.pgrb2.0p25.f{{ "%03d" % h }}</cyclestr></datadep>
-         {%- elif machine in ["ORION"]  %}
+         {%- elif machine in ["ORION","HERCULES"]  %}
          <datadep age="00:00:05:00"><cyclestr>{{ extrn_mdl_sysbasedir_lbcs }}/gdas.@Y@m@d/@H/atmos/gdas.t@Hz.atmf{{ "%03d" % h }}.nc</cyclestr></datadep>
          {%- else %}
          {%- if extrn_mdl_name_lbcs in ["GEFS"] %}
diff --git a/parm/FV3LAM_wflow_nonDA.xml b/parm/FV3LAM_wflow_nonDA.xml
index 0551ee712e..26ed8ec3fc 100644
--- a/parm/FV3LAM_wflow_nonDA.xml
+++ b/parm/FV3LAM_wflow_nonDA.xml
@@ -22,7 +22,7 @@ Parameters needed by the job scheduler.
 <!ENTITY QUEUE_FCST      "{{ queue_fcst }}">
 <!ENTITY QUEUE_POST      "{{ queue_post }}">
 <!ENTITY RRFS_RESERVE  {% if reservation %}"--reservation={{ reservation }}"{% else %}""{% endif %}>
-<!ENTITY SCHED_NATIVE_CMD  {% if machine in ["HERA", "JET", "ORION"] %}"--export=NONE"{% else %}""{% endif %}>
+<!ENTITY SCHED_NATIVE_CMD  {% if machine in ["HERA", "JET", "ORION", "HERCULES"] %}"--export=NONE"{% else %}""{% endif %}>
 
 <!--
 Workflow task names.
diff --git a/scripts/exrrfs_bufrsnd.sh b/scripts/exrrfs_bufrsnd.sh
index ecc71f60d7..e44684e166 100755
--- a/scripts/exrrfs_bufrsnd.sh
+++ b/scripts/exrrfs_bufrsnd.sh
@@ -101,6 +101,11 @@ case $MACHINE in
     APRUNS="time"
     ;;
 
+  "HERCULES")
+    APRUNC="srun --export=ALL"
+    APRUNS="time"
+    ;;
+
   "JET")
     APRUNC="srun --export=ALL"
     APRUNS="time"
diff --git a/scripts/exrrfs_calc_ensmean.sh b/scripts/exrrfs_calc_ensmean.sh
index e51d311b8b..c3dcffe385 100755
--- a/scripts/exrrfs_calc_ensmean.sh
+++ b/scripts/exrrfs_calc_ensmean.sh
@@ -78,6 +78,12 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  export OMP_NUM_THREADS=1
+  export OMP_STACKSIZE=1024M
+  APRUN="srun --export=ALL"
+  ;;
+#
 "JET")
   APRUN="srun --export=ALL"
   ;;
diff --git a/scripts/exrrfs_make_ics.sh b/scripts/exrrfs_make_ics.sh
index 9af3a1a352..c841755d85 100755
--- a/scripts/exrrfs_make_ics.sh
+++ b/scripts/exrrfs_make_ics.sh
@@ -76,6 +76,10 @@ case "$MACHINE" in
     APRUN="srun --export=ALL"
     ;;
 
+  "HERCULES")
+    APRUN="srun --export=ALL"
+    ;;
+
   "JET")
     APRUN="srun --export=ALL"
     ;;
diff --git a/scripts/exrrfs_make_lbcs.sh b/scripts/exrrfs_make_lbcs.sh
index 83636868bd..42c7cc602e 100755
--- a/scripts/exrrfs_make_lbcs.sh
+++ b/scripts/exrrfs_make_lbcs.sh
@@ -97,6 +97,10 @@ case "$MACHINE" in
     APRUN="srun --export=ALL"
     ;;
 
+  "HERCULES")
+    APRUN="srun --export=ALL"
+    ;;
+
   "JET")
     APRUN="srun --export=ALL"
     ;;
diff --git a/scripts/exrrfs_make_sfc_climo.sh b/scripts/exrrfs_make_sfc_climo.sh
index 268b84865c..92efc6c7c4 100755
--- a/scripts/exrrfs_make_sfc_climo.sh
+++ b/scripts/exrrfs_make_sfc_climo.sh
@@ -128,6 +128,10 @@ case $MACHINE in
     APRUN="srun --export=ALL"
     ;;
 
+  "HERCULES")
+    APRUN="srun --export=ALL"
+    ;;
+
   "JET")
     APRUN="srun --export=ALL"
     ;;
diff --git a/scripts/exrrfs_nonvarcldanl.sh b/scripts/exrrfs_nonvarcldanl.sh
index c00eae6c89..530a5586b8 100755
--- a/scripts/exrrfs_nonvarcldanl.sh
+++ b/scripts/exrrfs_nonvarcldanl.sh
@@ -96,6 +96,10 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  APRUN="srun --export=ALL"
+  ;;
+#
 esac
 #
 #-----------------------------------------------------------------------
diff --git a/scripts/exrrfs_process_bufr.sh b/scripts/exrrfs_process_bufr.sh
index 90758d07a8..f93c2d29ff 100755
--- a/scripts/exrrfs_process_bufr.sh
+++ b/scripts/exrrfs_process_bufr.sh
@@ -95,6 +95,10 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  APRUN="srun --export=ALL"
+  ;;
+#
 esac
 #
 #-----------------------------------------------------------------------
@@ -173,7 +177,7 @@ else
     fi
 
     ;;
-  "JET" | "HERA" | "ORION")
+  "JET" | "HERA" | "ORION" | "HERCULES")
 
     obsfileprefix=${YYYYMMDDHH}.${obs_source}
     obspath_tmp=${OBSPATH}
diff --git a/scripts/exrrfs_process_lightning.sh b/scripts/exrrfs_process_lightning.sh
index aff90723a8..8185281d79 100755
--- a/scripts/exrrfs_process_lightning.sh
+++ b/scripts/exrrfs_process_lightning.sh
@@ -95,6 +95,10 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  APRUN="srun --export=ALL"
+  ;;
+#
 esac
 #
 #-----------------------------------------------------------------------
diff --git a/scripts/exrrfs_process_pm.sh b/scripts/exrrfs_process_pm.sh
index 80332cace4..42900a1366 100755
--- a/scripts/exrrfs_process_pm.sh
+++ b/scripts/exrrfs_process_pm.sh
@@ -95,6 +95,10 @@ case $MACHINE in
   APRUN="srun"
   ;;
 #
+"HERCULES")
+  APRUN="srun"
+  ;;
+#
 esac
 #
 #-----------------------------------------------------------------------
diff --git a/scripts/exrrfs_process_radarref.sh b/scripts/exrrfs_process_radarref.sh
index 245793c8f3..48afdcdbfa 100755
--- a/scripts/exrrfs_process_radarref.sh
+++ b/scripts/exrrfs_process_radarref.sh
@@ -96,6 +96,10 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  APRUN="srun --export=ALL"
+  ;;
+#
 esac
 
 #
@@ -198,7 +202,7 @@ for bigmin in ${RADARREFL_TIMELEVEL[@]}; do
   "WCOSS2")
     obs_appendix=grib2.gz
     ;;
-  "JET" | "HERA" | "ORION")
+  "JET" | "HERA" | "ORION" | "HERCULES")
     obs_appendix=grib2
   esac
 
diff --git a/scripts/exrrfs_refl2tten.sh b/scripts/exrrfs_refl2tten.sh
index 4280a61a2c..acb36e2639 100755
--- a/scripts/exrrfs_refl2tten.sh
+++ b/scripts/exrrfs_refl2tten.sh
@@ -96,6 +96,10 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  APRUN="srun --export=ALL"
+  ;;
+#
 esac
 #
 #-----------------------------------------------------------------------
diff --git a/scripts/exrrfs_run_analysis.sh b/scripts/exrrfs_run_analysis.sh
index 1b138fdff2..8c7c64d421 100755
--- a/scripts/exrrfs_run_analysis.sh
+++ b/scripts/exrrfs_run_analysis.sh
@@ -102,6 +102,12 @@ case $MACHINE in
   APRUN="srun"
   ;;
 #
+"HERCULES")
+  export OMP_NUM_THREADS=${TPP_RUN_ANAL}
+  export OMP_STACKSIZE=1024M
+  APRUN="srun"
+  ;;
+#
 "JET")
   export OMP_NUM_THREADS=${TPP_RUN_ANAL}
   export OMP_STACKSIZE=1024M
@@ -273,7 +279,7 @@ if  [[ ${regional_ensemble_option:-1} -eq 1 || ${l_both_fv3sar_gfs_ens} = ".true
     fi
 
     ;;
-  "JET" | "HERA" | "ORION" )
+  "JET" | "HERA" | "ORION" | "HERCULES" )
 
     for loop in $loops; do
       for timelist in $(ls ${ENKF_FCST}/*.gdas.t*z.atmf${loop}.mem080.${ftype}); do
@@ -459,7 +465,7 @@ else
      obsfileprefix=${YYYYMMDDHH}.${obs_source}
      obspath_tmp=${OBSPATH}
     ;;
-  "ORION" )
+  "ORION" | "HERCULES")
      obs_source=rap
      obsfileprefix=${YYYYMMDDHH}.${obs_source}               # rap observation from JET.
      #obsfileprefix=${obs_source}.${YYYYMMDD}/${obs_source}    # observation from operation.
diff --git a/scripts/exrrfs_run_enkf.sh b/scripts/exrrfs_run_enkf.sh
index a3648710ea..f5e1be66af 100755
--- a/scripts/exrrfs_run_enkf.sh
+++ b/scripts/exrrfs_run_enkf.sh
@@ -91,6 +91,12 @@ case $MACHINE in
   APRUN="srun"
   ;;
 #
+"HERCULES")
+  export OMP_NUM_THREADS=${TPP_RUN_ENKF}
+  export OMP_STACKSIZE=1024M
+  APRUN="srun"
+  ;;
+#
 "JET")
   APRUN="srun --mem=0"
   ;;
diff --git a/scripts/exrrfs_run_fcst.sh b/scripts/exrrfs_run_fcst.sh
index fac076e0d4..3d9364de65 100755
--- a/scripts/exrrfs_run_fcst.sh
+++ b/scripts/exrrfs_run_fcst.sh
@@ -109,6 +109,10 @@ case $MACHINE in
     APRUN="srun --export=ALL --mem=0"
     ;;
 
+  "HERCULES")
+    APRUN="srun --export=ALL"
+    ;;
+
   "JET")
     APRUN="srun --export=ALL --mem=0"
     if [ "${PREDEF_GRID_NAME}" == "RRFS_NA_3km" ]; then
diff --git a/scripts/exrrfs_run_gsidiag.sh b/scripts/exrrfs_run_gsidiag.sh
index a9d9f89bd2..5584be746d 100755
--- a/scripts/exrrfs_run_gsidiag.sh
+++ b/scripts/exrrfs_run_gsidiag.sh
@@ -101,6 +101,12 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  export OMP_NUM_THREADS=1
+  export OMP_STACKSIZE=1024M
+  APRUN="srun --export=ALL"
+  ;;
+#
 "JET")
   export OMP_NUM_THREADS=2
   export OMP_STACKSIZE=1024M
diff --git a/scripts/exrrfs_run_post.sh b/scripts/exrrfs_run_post.sh
index fd603e59a6..ffb40687bf 100755
--- a/scripts/exrrfs_run_post.sh
+++ b/scripts/exrrfs_run_post.sh
@@ -106,6 +106,12 @@ case $MACHINE in
     APRUN="srun --export=ALL"
     ;;
 
+  "HERCULES")
+    export OMP_NUM_THREADS=1
+    export OMP_STACKSIZE=1024M
+    APRUN="srun --export=ALL"
+    ;;
+
   "JET")
     APRUN="srun --export=ALL"
     ;;
diff --git a/scripts/exrrfs_run_postanal.sh b/scripts/exrrfs_run_postanal.sh
index 2dbdf3c797..0ad9a33cc9 100755
--- a/scripts/exrrfs_run_postanal.sh
+++ b/scripts/exrrfs_run_postanal.sh
@@ -101,6 +101,12 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 
+"HERCULES")
+  export OMP_NUM_THREADS=1
+  export OMP_STACKSIZE=1024M
+  APRUN="srun --export=ALL"
+  ;;
+
 "JET")
   export OMP_NUM_THREADS=2
   export OMP_STACKSIZE=1024M
diff --git a/scripts/exrrfs_run_prdgen.sh b/scripts/exrrfs_run_prdgen.sh
index 12255bf186..b8ec01c701 100755
--- a/scripts/exrrfs_run_prdgen.sh
+++ b/scripts/exrrfs_run_prdgen.sh
@@ -99,6 +99,12 @@ case $MACHINE in
     APRUN="srun"
     ;;
 
+  "HERCULES")
+    export OMP_NUM_THREADS=1
+    export OMP_STACKSIZE=1024M
+    APRUN="srun"
+    ;;
+
   "JET")
     APRUN="srun"
     ;;
diff --git a/scripts/exrrfs_run_prepstart.sh b/scripts/exrrfs_run_prepstart.sh
index 4634333fca..078c8bba50 100755
--- a/scripts/exrrfs_run_prepstart.sh
+++ b/scripts/exrrfs_run_prepstart.sh
@@ -89,6 +89,10 @@ case $MACHINE in
     APRUN="srun --export=ALL"
     ;;
 
+  "HERCULES")
+    APRUN="srun --export=ALL"
+    ;;
+
   "JET")
     APRUN="srun --export=ALL --mem=0"
     ;;
diff --git a/scripts/exrrfs_run_prepstart_fromext.sh b/scripts/exrrfs_run_prepstart_fromext.sh
index e14e277b36..745d1687e3 100755
--- a/scripts/exrrfs_run_prepstart_fromext.sh
+++ b/scripts/exrrfs_run_prepstart_fromext.sh
@@ -88,6 +88,10 @@ case $MACHINE in
     APRUN="srun"
     ;;
 
+  "HERCULES")
+    APRUN="srun"
+    ;;
+
   "JET")
     APRUN="srun"
     ;;
diff --git a/scripts/exrrfs_run_recenter.sh b/scripts/exrrfs_run_recenter.sh
index c8b0116dec..f8cde6e4e3 100755
--- a/scripts/exrrfs_run_recenter.sh
+++ b/scripts/exrrfs_run_recenter.sh
@@ -74,6 +74,12 @@ case $MACHINE in
   APRUN="srun --export=ALL"
   ;;
 #
+"HERCULES")
+  export OMP_NUM_THREADS=1
+  export OMP_STACKSIZE=1024M
+  APRUN="srun --export=ALL"
+  ;;
+#
 "JET")
   APRUN="srun --export=ALL"
   ;;
diff --git a/sorc/app_build.sh b/sorc/app_build.sh
index bab05f1096..2ebc387604 100755
--- a/sorc/app_build.sh
+++ b/sorc/app_build.sh
@@ -10,7 +10,7 @@ OPTIONS
       show this help guide
   -p, --platform=PLATFORM
       name of machine you are building on
-      (e.g. cheyenne | hera | jet | orion | wcoss2)
+      (e.g. cheyenne | hera | jet | orion | hercules | wcoss2)
   -c, --compiler=COMPILER
       compiler to use; default depends on platform
       (e.g. intel | gnu | cray | gccgfortran)
@@ -223,7 +223,7 @@ fi
 
 # check if PLATFORM is set
 if [ -z $PLATFORM ] ; then
-  # Automatically detect HPC platforms for wcoss2, hera, jet, orion, etc
+  # Automatically detect HPC platforms for wcoss2, hera, jet, orion, hercules, etc
   source ${HOME_DIR}/ush/fix_rrfs_locations.sh
   if [[ "$PLATFORM" == "unknown" ]]; then
     printf "\nERROR: Please set PLATFORM.\n\n"
@@ -266,6 +266,10 @@ if [ "${EXTRN}" = true ]; then
   fi
 
   # run check-out
+  python --version 1>/dev/null 2>/dev/null
+  if [[ $? -ne 0 ]]; then
+       module load python
+  fi
   printf "... checking out external components ...\n"
   ./manage_externals/checkout_externals
 fi
@@ -298,7 +302,7 @@ set -eu
 if [ -z "${COMPILER}" ] ; then
   case ${PLATFORM} in
     jet|hera|gaea) COMPILER=intel ;;
-    orion) COMPILER=intel ;;
+    orion|hercules) COMPILER=intel ;;
     wcoss2) COMPILER=intel ;;
     cheyenne) COMPILER=intel ;;
     macos|singularity) COMPILER=gnu ;;
diff --git a/ush/etc/lmod-setup.csh b/ush/etc/lmod-setup.csh
index d61f989124..8bdf05f99b 100644
--- a/ush/etc/lmod-setup.csh
+++ b/ush/etc/lmod-setup.csh
@@ -6,7 +6,7 @@ Usage: source etc/lmod-setup.csh PLATFORM
 
 OPTIONS:
    PLATFORM - name of machine you are building on
-      (e.g. wcoss2 | hera | jet | orion )
+      (e.g. wcoss2 | hera | jet | orion | hercules )
 EOF_USAGE
    exit 1
 else
diff --git a/ush/etc/lmod-setup.sh b/ush/etc/lmod-setup.sh
index 9f7c34b089..3bb3049054 100644
--- a/ush/etc/lmod-setup.sh
+++ b/ush/etc/lmod-setup.sh
@@ -7,7 +7,7 @@ Usage: source etc/lmod-setup.sh PLATFORM
 
 OPTIONS:
    PLATFORM - name of machine you are building on
-      (e.g. wcoss2 | hera | jet | orion )
+      (e.g. wcoss2 | hera | jet | orion | hercules )
 EOF_USAGE
    exit 1
 else
diff --git a/ush/fix_rrfs_locations.sh b/ush/fix_rrfs_locations.sh
index 25fc74b377..c038aa9fec 100755
--- a/ush/fix_rrfs_locations.sh
+++ b/ush/fix_rrfs_locations.sh
@@ -12,8 +12,13 @@ elif [[ -d /jetmon ]] ; then
     PLATFORM=jet
     FIX_RRFS_LOCATION="/lfs4/BMC/nrtrr/FIX_RRFS"
 elif [[ -d /work ]]; then
-    PLATFORM=orion
     FIX_RRFS_LOCATION="/work/noaa/rtrr/FIX_RRFS"
+    hoststr=$(hostname)
+    if [[ "$hoststr" == "hercules"* ]]; then                                                                                                                           
+      PLATFORM=hercules
+    else
+      PLATFORM=orion
+    fi
 else
     PLATFORM=unknown
     FIX_RRFS_LOCATION="/this/is/an/unknown/platform"
diff --git a/ush/get_extrn_mdl_file_dir_info.sh b/ush/get_extrn_mdl_file_dir_info.sh
index 49d037f04c..3eb43ea90b 100755
--- a/ush/get_extrn_mdl_file_dir_info.sh
+++ b/ush/get_extrn_mdl_file_dir_info.sh
@@ -419,7 +419,7 @@ case "${anl_or_fcst}" in
       elif [ "${MACHINE}" = "JET" ] ; then
         fns_on_disk=( "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.atmf0${fcst_hh}.${GDAS_MEM_NAME}.nc" "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.sfcf0${fcst_hh}.${GDAS_MEM_NAME}.nc")  # use netcdf
         fns_in_arcv=( "gdas.t${hh}z.atmf0${fcst_hh}.nc" "gdas.t${hh}z.sfcf0${fcst_hh}.nc")  # use netcdf
-      elif [ "${MACHINE}" = "ORION" ] ; then
+      elif [[ "${MACHINE}" = "ORION" ]] || [[ "${MACHINE}" = "HERCULES" ]]; then
         fns_on_disk=( "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.atmf0${fcst_hh}.${GDAS_MEM_NAME}.nc" "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.sfcf0${fcst_hh}.${GDAS_MEM_NAME}.nc")  # use netcdf
         fns_in_arcv=( "gdas.t${hh}z.atmf0${fcst_hh}.nc" "gdas.t${hh}z.sfcf0${fcst_hh}.nc")  # use netcdf
       fi
@@ -548,7 +548,7 @@ and analysis or forecast (anl_or_fcst):
       elif  [ "${MACHINE}" = "JET" ]; then
         fns_on_disk=( "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.atmf0${fcst_hh}.${GDAS_MEM_NAME}.nc" "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.sfcf0${fcst_hh}.${GDAS_MEM_NAME}.nc")  # use netcdf
         fns_in_arcv=( "gdas.t${hh}z.atmf${fcst_hhh}.nc" "gdas.t${hh}z.sfcf${fcst_hhh}.nc" )  #  for now.
-      elif  [ "${MACHINE}" = "ORION" ]; then
+      elif [[ "${MACHINE}" = "ORION" ]] || [[ "${MACHINE}" = "HERCULES" ]]; then
         fns_on_disk=( "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.atmf0${fcst_hh}.${GDAS_MEM_NAME}.nc" "${yy}${ddd}${hh}${mn}.gdas.t${hh}z.sfcf0${fcst_hh}.${GDAS_MEM_NAME}.nc")  # use netcdf
         fns_in_arcv=( "gdas.t${hh}z.atmf${fcst_hhh}.nc" "gdas.t${hh}z.sfcf${fcst_hhh}.nc" )  #  for now.
       fi
@@ -664,7 +664,7 @@ bination of external model (extrn_mdl_name) and analysis or forecast
     "HERA")
       sysdir=""
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       sysdir="$sysbasedir"
       ;;
     "JET")
@@ -694,7 +694,7 @@ has not been specified for this external model and machine combination:
       sysdir="$sysbasedir"
       #sysdir="$sysbasedir/gfs.${yyyymmdd}/${hh}/atmos"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       sysdir="$sysbasedir"
       #sysdir="$sysbasedir/gdas.${yyyymmdd}/${hh}/atmos"
       ;;
@@ -722,7 +722,7 @@ has not been specified for this external model and machine combination:
     "JET")
        sysdir="$sysbasedir"
        ;;
-    "ORION")
+    "ORION"|"HERCULES")
        sysdir="$sysbasedir"
        ;;
     *)
@@ -787,7 +787,7 @@ has not been specified for this external model and machine combination:
     "HERA")
       sysdir="$sysbasedir"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       sysdir="$sysbasedir"
       ;;
     "JET")
@@ -812,7 +812,7 @@ has not been specified for this external model and machine combination:
     "HERA")
       sysdir="$sysbasedir"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       sysdir="$sysbasedir"
       ;;
     "JET")
@@ -836,7 +836,7 @@ has not been specified for this external model and machine combination:
     "HERA")
       sysdir="$sysbasedir"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       sysdir="$sysbasedir"
       ;;
     "JET")
@@ -860,7 +860,7 @@ has not been specified for this external model and machine combination:
     "HERA")
       sysdir="$sysbasedir"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       sysdir="$sysbasedir"
       ;;
     "JET")
diff --git a/ush/load_modules_wflow.sh b/ush/load_modules_wflow.sh
index 11dfe4876f..ecba3677b5 100755
--- a/ush/load_modules_wflow.sh
+++ b/ush/load_modules_wflow.sh
@@ -16,7 +16,7 @@ Usage: source $0 PLATFORM
 
 OPTIONS:
    PLATFORM - name of machine you are on
-      (e.g. wcoss2 | hera | jet | orion )
+      (e.g. wcoss2 | hera | jet | orion | hercules )
 EOF_USAGE
 }
 
diff --git a/ush/sample_configs/non-DA_eng/config.nonDA.grib2.hercules.sh b/ush/sample_configs/non-DA_eng/config.nonDA.grib2.hercules.sh
new file mode 100644
index 0000000000..9257c206ef
--- /dev/null
+++ b/ush/sample_configs/non-DA_eng/config.nonDA.grib2.hercules.sh
@@ -0,0 +1,55 @@
+MACHINE="hercules"
+ACCOUNT="fv3-cam"
+HPSS_ACCOUNT="fv3-cam"
+EXPT_SUBDIR="test_nonDA_grib2"
+
+envir="test"
+NET="test"
+TAG="c0v00"
+MODEL="test"
+RUN="test"
+
+STMP="/work/noaa/fv3-cam/${USER}/test_nonDA_grib2"
+PTMP="/work/noaa/fv3-cam/${USER}/test_nonDA_grib2"
+
+VERBOSE="TRUE"
+PRINT_ESMF="TRUE"
+
+USE_CRON_TO_RELAUNCH="TRUE"
+CRON_RELAUNCH_INTVL_MNTS="03"
+
+PREEXISTING_DIR_METHOD="rename"
+
+PREDEF_GRID_NAME="RRFS_CONUS_25km"
+QUILTING="TRUE"
+
+CCPP_PHYS_SUITE="FV3_HRRR"
+FCST_LEN_HRS="6"
+LBC_SPEC_INTVL_HRS="6"
+
+DATE_FIRST_CYCL="20190615"
+DATE_LAST_CYCL="20190615"
+CYCL_HRS=( "00" )
+
+RUN_TASK_MAKE_GRID="TRUE"
+RUN_TASK_MAKE_OROG="TRUE"
+RUN_TASK_MAKE_SFC_CLIMO="TRUE"
+
+EXTRN_MDL_NAME_ICS="FV3GFS"
+EXTRN_MDL_NAME_LBCS="FV3GFS"
+
+FV3GFS_FILE_FMT_ICS="grib2"
+FV3GFS_FILE_FMT_LBCS="grib2"
+
+WTIME_RUN_FCST="01:00:00"
+PPN_RUN_FCST="12"
+
+DO_NON_DA_RUN="TRUE"
+DO_RETRO="TRUE"
+VCOORD_FILE="global_hyblev.l65.txt"
+WFLOW_XML_TMPL_FN="FV3LAM_wflow_nonDA.xml"
+FV3_NML_YAML_CONFIG_FN="FV3.input.nonDA.yml"
+
+USE_USER_STAGED_EXTRN_FILES="TRUE"
+EXTRN_MDL_SOURCE_BASEDIR_ICS="/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/input_model_data/FV3GFS/grib2/2019061500"
+EXTRN_MDL_SOURCE_BASEDIR_LBCS="/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/input_model_data/FV3GFS/grib2/2019061500"
diff --git a/ush/sample_configs/non-DA_eng/config.nonDA.netcdf.hercules.sh b/ush/sample_configs/non-DA_eng/config.nonDA.netcdf.hercules.sh
new file mode 100644
index 0000000000..6c90dbaa67
--- /dev/null
+++ b/ush/sample_configs/non-DA_eng/config.nonDA.netcdf.hercules.sh
@@ -0,0 +1,55 @@
+MACHINE="hercules"
+ACCOUNT="fv3-cam"
+HPSS_ACCOUNT="fv3-cam"
+EXPT_SUBDIR="test_nonDA_netcdf"
+
+envir="test"
+NET="test"
+TAG="c0v00"
+MODEL="test"
+RUN="test"
+
+STMP="/work/noaa/fv3-cam/${USER}/test_nonDA_netcdf"
+PTMP="/work/noaa/fv3-cam/${USER}/test_nonDA_netcdf"
+
+VERBOSE="TRUE"
+PRINT_ESMF="TRUE"
+
+USE_CRON_TO_RELAUNCH="TRUE"
+CRON_RELAUNCH_INTVL_MNTS="03"
+
+PREEXISTING_DIR_METHOD="rename"
+
+PREDEF_GRID_NAME="RRFS_CONUS_25km"
+QUILTING="TRUE"
+
+CCPP_PHYS_SUITE="FV3_HRRR"
+FCST_LEN_HRS="6"
+LBC_SPEC_INTVL_HRS="6"
+
+DATE_FIRST_CYCL="20230217"
+DATE_LAST_CYCL="20230217"
+CYCL_HRS=( "06" )
+
+RUN_TASK_MAKE_GRID="TRUE"
+RUN_TASK_MAKE_OROG="TRUE"
+RUN_TASK_MAKE_SFC_CLIMO="TRUE"
+
+EXTRN_MDL_NAME_ICS="FV3GFS"
+EXTRN_MDL_NAME_LBCS="FV3GFS"
+
+FV3GFS_FILE_FMT_ICS="netcdf"
+FV3GFS_FILE_FMT_LBCS="netcdf"
+
+WTIME_RUN_FCST="01:00:00"
+PPN_RUN_FCST="12"
+
+DO_NON_DA_RUN="TRUE"
+DO_RETRO="TRUE"
+VCOORD_FILE="global_hyblev.l65.txt"
+WFLOW_XML_TMPL_FN="FV3LAM_wflow_nonDA.xml"
+FV3_NML_YAML_CONFIG_FN="FV3.input.nonDA.yml"
+
+USE_USER_STAGED_EXTRN_FILES="TRUE"
+EXTRN_MDL_SOURCE_BASEDIR_ICS="/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/input_model_data/FV3GFS/netcdf/2023021706"
+EXTRN_MDL_SOURCE_BASEDIR_LBCS="/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/input_model_data/FV3GFS/netcdf/2023021706"
diff --git a/ush/sample_configs/smoke_dust/config.sh.RRFS-SD_PM25DA_CONUS_3km b/ush/sample_configs/smoke_dust/config.sh.RRFS-SD_PM25DA_CONUS_3km
index c900e078c2..8d8a50d479 100644
--- a/ush/sample_configs/smoke_dust/config.sh.RRFS-SD_PM25DA_CONUS_3km
+++ b/ush/sample_configs/smoke_dust/config.sh.RRFS-SD_PM25DA_CONUS_3km
@@ -33,7 +33,7 @@ if [[ $MACHINE == "hera" ]] ; then
   QUEUE_GRAPHICS="batch"
 fi
 
-if [[ $MACHINE == "orion" ]] ; then
+if [[ $MACHINE == "orion" ]] || [[ $MACHINE == "hercules" ]]; then
   ACCOUNT=wrfruc
   QUEUE_ANALYSIS="batch"
   QUEUE_WGRIB2="batch"
@@ -205,7 +205,7 @@ if [[ $MACHINE == "wcoss2" ]] ; then
   FV3GFS_FILE_FMT_LBCS="netcdf"
 fi
 
-if [[ $MACHINE == "orion" ]] ; then
+if [[ $MACHINE == "orion" ]] || [[ $MACHINE == "hercules" ]]; then
   LAYOUT_X="30"
   LAYOUT_Y="40"
   PPN_RUN_FCST="40"
diff --git a/ush/set_extrn_mdl_params.sh b/ush/set_extrn_mdl_params.sh
index ca4e040419..392390134a 100644
--- a/ush/set_extrn_mdl_params.sh
+++ b/ush/set_extrn_mdl_params.sh
@@ -59,7 +59,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_ICS=""
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_ICS=""
       ;;
     "JET")
@@ -76,7 +76,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_ICS="/scratch1/NCEPDEV/rstprod/com/gfs/prod"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_ICS=""
       ;;
     "JET")
@@ -121,7 +121,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_ICS="/scratch2/BMC/public/data/gsd/rap/full/wrfnat"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_ICS=""
       ;;
     "JET")
@@ -135,7 +135,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_ICS="/scratch2/BMC/public/data/gsd/hrrr/conus/wrfnat"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_ICS=""
       ;;
     "JET")
@@ -250,7 +250,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_LBCS=""
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_LBCS=""
       ;;
     "JET")
@@ -267,7 +267,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_LBCS="/scratch1/NCEPDEV/rstprod/com/gfs/prod"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_LBCS=""
       ;;
     "JET")
@@ -306,7 +306,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_LBCS="/scratch2/BMC/public/data/gsd/rap/full/wrfnat"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_LBCS=""
       ;;
     "JET")
@@ -320,7 +320,7 @@ else
     "HERA")
       EXTRN_MDL_SYSBASEDIR_LBCS="/scratch2/BMC/public/data/gsd/hrrr/conus/wrfnat"
       ;;
-    "ORION")
+    "ORION"|"HERCULES")
       EXTRN_MDL_SYSBASEDIR_LBCS=""
       ;;
     "JET")
diff --git a/ush/set_rrfs_config.sh b/ush/set_rrfs_config.sh
index 846a02994c..2695720df5 100644
--- a/ush/set_rrfs_config.sh
+++ b/ush/set_rrfs_config.sh
@@ -110,7 +110,7 @@ if [[ $DO_RETRO == "TRUE" ]] ; then
     RAPHRR_SOIL_ROOT=${RETRODATAPATH}/rap_hrrr_soil
     FIRE_RAVE_DIR=${RETRODATAPATH}/RAVE_RAW
   fi
-  if [[ $MACHINE == "orion" ]] ; then
+  if [[ $MACHINE == "orion" ]] || [[ $MACHINE == "hercules" ]] ; then
     if [[ ${DO_ENSEMBLE} == "TRUE" ]]; then
       if [[ ${EXTRN_MDL_NAME_ICS} == "GDASENKF" ]]; then
         EXTRN_MDL_SOURCE_BASEDIR_ICS="/work/noaa/wrfruc/mhu/rrfs/data/enkf/atm"
diff --git a/ush/set_rrfs_config_general.sh b/ush/set_rrfs_config_general.sh
index f7dab780a3..c665d1d35e 100644
--- a/ush/set_rrfs_config_general.sh
+++ b/ush/set_rrfs_config_general.sh
@@ -37,7 +37,7 @@ elif [[ $MACHINE == "hera" ]] ; then
   QUEUE_GRAPHICS="batch"
 
 elif [[ $MACHINE == "orion" ]] ; then
-  ACCOUNT="fv3-cam"
+  ACCOUNT="${ACCOUNT:-fv3-cam}"
   PARTITION_ANALYSIS=orion
   QUEUE_ANALYSIS="batch"
   QUEUE_PRDGEN="batch"
@@ -45,6 +45,15 @@ elif [[ $MACHINE == "orion" ]] ; then
   QUEUE_POST="batch"
   NCORES_PER_NODE=24
 
+elif [[ $MACHINE == "hercules" ]] ; then
+  ACCOUNT="${ACCOUNT:-rtrr}"
+  PARTITION_ANALYSIS=hercules
+  QUEUE_ANALYSIS="batch"
+  QUEUE_PRDGEN="batch"
+  QUEUE_GRAPHICS="batch"
+  QUEUE_POST="batch"
+  NCORES_PER_NODE=24
+
 elif [[ $MACHINE == "wcoss2" ]] ; then
   ACCOUNT=RRFS-DEV
   HPSS_ACCOUNT="RRFS-DEV"
@@ -276,6 +285,12 @@ if [[ ${PREDEF_GRID_NAME} == "RRFS_CONUS_3km" ]] ; then
     LAYOUT_Y="40"
     PPN_RUN_FCST="40"
     WTIME_RUN_PRDGEN="00:20:00"
+
+  elif [[ $MACHINE == "hercules" ]] ; then
+    LAYOUT_X="30"
+    LAYOUT_Y="40"
+    PPN_RUN_FCST="40"
+    WTIME_RUN_PRDGEN="00:20:00"
   fi
 
 elif [[ ${PREDEF_GRID_NAME} == "RRFS_CONUS_13km" ]] ; then 
@@ -351,6 +366,12 @@ elif [[ ${PREDEF_GRID_NAME} == "RRFS_CONUS_13km" ]] ; then
     PPN_RUN_FCST="40"
     WTIME_RUN_PRDGEN="00:20:00"
  
+  elif [[ $MACHINE == "hercules" ]] ; then
+    LAYOUT_X="30"
+    LAYOUT_Y="40"
+    PPN_RUN_FCST="40"
+    WTIME_RUN_PRDGEN="00:20:00"
+ 
   elif [[ $MACHINE == "hera" ]] ; then
     NNODES_MAKE_ICS="1"
     NNODES_MAKE_LBCS="1"
diff --git a/ush/setup.sh b/ush/setup.sh
index b60a99e7f5..5a19b47d3b 100755
--- a/ush/setup.sh
+++ b/ush/setup.sh
@@ -561,6 +561,17 @@ case $MACHINE in
     QUEUE_FCST=${QUEUE_FCST:-"batch"}
     ;;
 
+  "HERCULES")
+    NCORES_PER_NODE=40
+    SCHED="${SCHED:-slurm}"
+    PARTITION_DEFAULT=${PARTITION_DEFAULT:-"hercules"}
+    QUEUE_DEFAULT=${QUEUE_DEFAULT:-"batch"}
+    PARTITION_HPSS=${PARTITION_HPSS:-"service"}
+    QUEUE_HPSS=${QUEUE_HPSS:-"batch"}
+    PARTITION_FCST=${PARTITION_FCST:-"hercules"}
+    QUEUE_FCST=${QUEUE_FCST:-"batch"}
+    ;;
+
   "JET")
     NCORES_PER_NODE=${NCORES_PER_NODE}
     SCHED="${SCHED:-slurm}"
@@ -817,7 +828,7 @@ case $MACHINE in
     FIXLAM_NCO_BASEDIR=${FIXLAM_NCO_BASEDIR:-"/scratch1/NCEPDEV/nems/role.epic/UFS_SRW_data/develop/FV3LAM_pregen"}
     ;;
 
-  "ORION")
+  "ORION"|"HERCULES")
     FIXgsm=${FIXgsm:-"/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/fix/fix_am"}
     TOPO_DIR=${TOPO_DIR:-"/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/fix/fix_orog"}
     SFC_CLIMO_INPUT_DIR=${SFC_CLIMO_INPUT_DIR:-"/work/noaa/epic/role-epic/contrib/UFS_SRW_data/develop/fix/fix_sfc_climo"}
diff --git a/ush/valid_param_vals.sh b/ush/valid_param_vals.sh
index 0e86c7084c..28c1f4651b 100644
--- a/ush/valid_param_vals.sh
+++ b/ush/valid_param_vals.sh
@@ -1,6 +1,6 @@
 valid_vals_VERBOSE=("TRUE" "true" "YES" "yes" "FALSE" "false" "NO" "no")
 valid_vals_SAVE_CYCLE_LOG=("TRUE" "true" "YES" "yes" "FALSE" "false" "NO" "no")
-valid_vals_MACHINE=("WCOSS2" "HERA" "ORION" "JET")
+valid_vals_MACHINE=("WCOSS2" "HERA" "ORION" "JET" "HERCULES")
 valid_vals_SCHED=("slurm" "pbspro" "lsf" "lsfcray" "none")
 valid_vals_PREDEF_GRID_NAME=( \
 "RRFS_CONUS_25km" \