diff --git a/ci/cases/pr/C48mx500_3DVarAOWCDA.yaml b/ci/cases/pr/C48mx500_3DVarAOWCDA.yaml
index 2de5fea7ff..762d2c3fbe 100644
--- a/ci/cases/pr/C48mx500_3DVarAOWCDA.yaml
+++ b/ci/cases/pr/C48mx500_3DVarAOWCDA.yaml
@@ -9,7 +9,7 @@ arguments:
   resdetocean: 5.0
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C48mx500/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C48mx500/20241120
   idate: 2021032412
   edate: 2021032418
   nens: 0
diff --git a/ci/cases/pr/C48mx500_hybAOWCDA.yaml b/ci/cases/pr/C48mx500_hybAOWCDA.yaml
index 036aa8ca60..ca477b5fba 100644
--- a/ci/cases/pr/C48mx500_hybAOWCDA.yaml
+++ b/ci/cases/pr/C48mx500_hybAOWCDA.yaml
@@ -10,7 +10,7 @@ arguments:
   resensatmos: 48
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C48mx500/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C48mx500/20241120
   idate: 2021032412
   edate: 2021032418
   nens: 3
diff --git a/ci/cases/pr/C96C48_hybatmDA.yaml b/ci/cases/pr/C96C48_hybatmDA.yaml
index b527903d69..c0833acf14 100644
--- a/ci/cases/pr/C96C48_hybatmDA.yaml
+++ b/ci/cases/pr/C96C48_hybatmDA.yaml
@@ -10,7 +10,7 @@ arguments:
   resensatmos: 48
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20241120
   idate: 2021122018
   edate: 2021122106
   nens: 2
diff --git a/ci/cases/pr/C96C48_hybatmaerosnowDA.yaml b/ci/cases/pr/C96C48_hybatmaerosnowDA.yaml
index 57d0989ae3..93abda95e5 100644
--- a/ci/cases/pr/C96C48_hybatmaerosnowDA.yaml
+++ b/ci/cases/pr/C96C48_hybatmaerosnowDA.yaml
@@ -9,7 +9,7 @@ arguments:
   resensatmos: 48
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20241120
   idate: 2021122012
   edate: 2021122100
   nens: 2
diff --git a/ci/cases/pr/C96C48_ufs_hybatmDA.yaml b/ci/cases/pr/C96C48_ufs_hybatmDA.yaml
index 031054079a..240f04c090 100644
--- a/ci/cases/pr/C96C48_ufs_hybatmDA.yaml
+++ b/ci/cases/pr/C96C48_ufs_hybatmDA.yaml
@@ -9,7 +9,7 @@ arguments:
   resensatmos: 48
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20241120
   idate: 2024022318
   edate: 2024022406
   nens: 2
diff --git a/ci/cases/pr/C96_atm3DVar.yaml b/ci/cases/pr/C96_atm3DVar.yaml
index fc09beeacf..6286d74dc4 100644
--- a/ci/cases/pr/C96_atm3DVar.yaml
+++ b/ci/cases/pr/C96_atm3DVar.yaml
@@ -8,7 +8,7 @@ arguments:
   resdetatmos: 96
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20241120
   idate: 2021122018
   edate: 2021122106
   nens: 0
diff --git a/ci/cases/pr/C96_atm3DVar_extended.yaml b/ci/cases/pr/C96_atm3DVar_extended.yaml
index 8ab67a750e..45a0cdd6d2 100644
--- a/ci/cases/pr/C96_atm3DVar_extended.yaml
+++ b/ci/cases/pr/C96_atm3DVar_extended.yaml
@@ -8,7 +8,7 @@ arguments:
   resdetatmos: 96
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20240610
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C96C48/20241120
   idate: 2021122018
   edate: 2021122118
   nens: 0
diff --git a/ci/cases/weekly/C384C192_hybatmda.yaml b/ci/cases/weekly/C384C192_hybatmda.yaml
index 6053f73124..ecaea3757f 100644
--- a/ci/cases/weekly/C384C192_hybatmda.yaml
+++ b/ci/cases/weekly/C384C192_hybatmda.yaml
@@ -10,7 +10,7 @@ arguments:
   resensatmos: 192
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C384C192
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C384C192/20240610
   idate: 2023040118
   edate: 2023040200
   nens: 2
diff --git a/ci/cases/weekly/C384_atm3DVar.yaml b/ci/cases/weekly/C384_atm3DVar.yaml
index 1a14059ab1..4409a73ac1 100644
--- a/ci/cases/weekly/C384_atm3DVar.yaml
+++ b/ci/cases/weekly/C384_atm3DVar.yaml
@@ -10,7 +10,7 @@ arguments:
   resensatmos: 192
   comroot: {{ 'RUNTESTS' | getenv }}/COMROOT
   expdir: {{ 'RUNTESTS' | getenv }}/EXPDIR
-  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C384C192
+  icsdir: {{ 'ICSDIR_ROOT' | getenv }}/C384C192/20240610
   idate: 2023040118
   edate: 2023040200
   nens: 0
diff --git a/parm/config/gefs/config.stage_ic b/parm/config/gefs/config.stage_ic
index 92c6bb2a9b..5822f2e794 100644
--- a/parm/config/gefs/config.stage_ic
+++ b/parm/config/gefs/config.stage_ic
@@ -12,12 +12,11 @@ export BASE_IC="@BASE_IC@" # Platform home for staged ICs
 
 export STAGE_IC_YAML_TMPL="${PARMgfs}/stage/master_gefs.yaml.j2"
 
-# Set ICSDIR
+source "${HOMEgfs}/versions/ic.ver"
 
+# Set ICSDIR (if not defined)
 if [[ -z "${ICSDIR}" ]] ; then
 
-  ic_ver="20240610"
-
   if (( NMEM_ENS > 0 )) ; then
     ensic="${CASE_ENS}"
   fi
@@ -26,7 +25,10 @@ if [[ -z "${ICSDIR}" ]] ; then
     ocnic="mx${OCNRES}"
   fi
 
-  export ICSDIR="${BASE_IC}/${CASE}${ensic:-}${ocnic:-}/${ic_ver}"
+  dir_name="${CASE}${ensic:-}${ocnic:-}"
+  ic_ver="${ic_versions[${dir_name}]}"
+
+  export ICSDIR="${BASE_IC}/${dir_name}/${ic_ver}"
 
 fi
 
diff --git a/parm/config/gfs/config.stage_ic b/parm/config/gfs/config.stage_ic
index d0113fac63..f30e402c93 100644
--- a/parm/config/gfs/config.stage_ic
+++ b/parm/config/gfs/config.stage_ic
@@ -12,11 +12,11 @@ export BASE_IC="@BASE_IC@" # Platform home for staged ICs
 
 export STAGE_IC_YAML_TMPL="${PARMgfs}/stage/master_gfs.yaml.j2"
 
+source "${HOMEgfs}/versions/ic.ver"
+
 # Set ICSDIR (if not defined)
 if [[ -z "${ICSDIR}" ]] ; then
 
-  ic_ver="20240610"
-
   if (( NMEM_ENS > 0 )) ; then
     ensic="${CASE_ENS}"
   fi
@@ -25,7 +25,10 @@ if [[ -z "${ICSDIR}" ]] ; then
     ocnic="mx${OCNRES}"
   fi
 
-  export ICSDIR="${BASE_IC}/${CASE}${ensic:-}${ocnic:-}/${ic_ver}"
+  dir_name="${CASE}${ensic:-}${ocnic:-}"
+  ic_ver="${ic_versions[${dir_name}]}"
+
+  export ICSDIR="${BASE_IC}/${dir_name}/${ic_ver}"
 
 fi
 
diff --git a/parm/stage/master_gfs.yaml.j2 b/parm/stage/master_gfs.yaml.j2
index 5204221c9b..e862005094 100644
--- a/parm/stage/master_gfs.yaml.j2
+++ b/parm/stage/master_gfs.yaml.j2
@@ -94,11 +94,6 @@
                                     '${YMD}':previous_cycle_YMD,
                                     '${HH}':previous_cycle_HH,
                                     '${MEMDIR}': mem_char }) %}
-    {% set previous_cycle_and_run_dict = ({ '${ROTDIR}':ROTDIR,
-                                            '${RUN}':RUN,
-                                            '${YMD}':previous_cycle_YMD,
-                                            '${HH}':previous_cycle_HH,
-                                            '${MEMDIR}': mem_char }) %}
 
     {% set COMOUT_ATMOS_INPUT_MEM = COM_ATMOS_INPUT_TMPL | replace_tmpl(current_cycle_dict) %}
     {% set COMOUT_ATMOS_RESTART_PREV_MEM = COM_ATMOS_RESTART_TMPL | replace_tmpl(previous_cycle_dict) %}
@@ -108,7 +103,7 @@
     {% set COMOUT_OCEAN_RESTART_PREV_MEM = COM_OCEAN_RESTART_TMPL | replace_tmpl(previous_cycle_dict) %}
     {% set COMOUT_OCEAN_ANALYSIS_MEM = COM_OCEAN_ANALYSIS_TMPL | replace_tmpl(current_cycle_dict) %}
     {% set COMOUT_MED_RESTART_PREV_MEM = COM_MED_RESTART_TMPL | replace_tmpl(previous_cycle_dict) %}
-    {% set COMOUT_WAVE_RESTART_PREV_MEM = COM_WAVE_RESTART_TMPL | replace_tmpl(previous_cycle_and_run_dict) %}
+    {% set COMOUT_WAVE_RESTART_PREV_MEM = COM_WAVE_RESTART_TMPL | replace_tmpl(previous_cycle_dict) %}
 
     # Append the member COM directories
     {% do COMOUT_ATMOS_INPUT_MEM_list.append(COMOUT_ATMOS_INPUT_MEM)%}
diff --git a/ush/forecast_postdet.sh b/ush/forecast_postdet.sh
index 310fcf0afa..aade469ddc 100755
--- a/ush/forecast_postdet.sh
+++ b/ush/forecast_postdet.sh
@@ -328,39 +328,33 @@ WW3_postdet() {
 
   local ww3_grid first_ww3_restart_out ww3_restart_file
   # Copy initial condition files:
-  if [[ "${warm_start}" == ".true." ]]; then
-    local restart_date restart_dir
-    if [[ "${RERUN}" == "YES" ]]; then
-      restart_date="${RERUN_DATE}"
-      restart_dir="${DATArestart}/WW3_RESTART"
-    else
-      restart_date="${model_start_date_current_cycle}"
-      restart_dir="${COMIN_WAVE_RESTART_PREV}"
-    fi
-    echo "Copying WW3 restarts for 'RUN=${RUN}' at '${restart_date}' from '${restart_dir}'"
-    ww3_restart_file="${restart_dir}/${restart_date:0:8}.${restart_date:8:2}0000.restart.ww3"
-    if [[ -f "${ww3_restart_file}" ]]; then
-      ${NCP} "${ww3_restart_file}" "${DATA}/restart.ww3" \
+  local restart_date restart_dir
+  if [[ "${RERUN}" == "YES" ]]; then
+    restart_date="${RERUN_DATE}"
+    restart_dir="${DATArestart}/WW3_RESTART"
+  else
+    restart_date="${model_start_date_current_cycle}"
+    restart_dir="${COMIN_WAVE_RESTART_PREV}"
+  fi
+
+  echo "Copying WW3 restarts for 'RUN=${RUN}' at '${restart_date}' from '${restart_dir}'"
+  ww3_restart_file="${restart_dir}/${restart_date:0:8}.${restart_date:8:2}0000.restart.ww3"
+  if [[ -s "${ww3_restart_file}" ]]; then
+    ${NCP} "${ww3_restart_file}" "${DATA}/restart.ww3" \
       || ( echo "FATAL ERROR: Unable to copy WW3 IC, ABORT!"; exit 1 )
+    first_ww3_restart_out=$(date --utc -d "${restart_date:0:8} ${restart_date:8:2} + ${restart_interval} hours" +%Y%m%d%H)
+  else
+    if [[ "${RERUN}" == "YES" ]]; then
+      # In the case of a RERUN, the WW3 restart file is required
+      echo "FATAL ERROR: WW3 restart file '${ww3_restart_file}' not found for RERUN='${RERUN}', ABORT!"
+      exit 1
     else
-      if [[ "${RERUN}" == "YES" ]]; then
-        # In the case of a RERUN, the WW3 restart file is required
-        echo "FATAL ERROR: WW3 restart file '${ww3_restart_file}' not found for RERUN='${RERUN}', ABORT!"
-        exit 1
-      else
-        echo "WARNING: WW3 restart file '${ww3_restart_file}' not found for warm_start='${warm_start}', will start from rest!"
-      fi
+      echo "WARNING: WW3 restart file '${ww3_restart_file}' not found for warm_start='${warm_start}', will start from rest!"
+      first_ww3_restart_out=${model_start_date_current_cycle}
     fi
-
-    first_ww3_restart_out=$(date --utc -d "${restart_date:0:8} ${restart_date:8:2} + ${restart_interval} hours" +%Y%m%d%H)
-  else  # cold start
-    echo "WW3 will start from rest!"
-    first_ww3_restart_out="${model_start_date_current_cycle}"
-  fi  # [[ "${warm_start}" == ".true." ]]
+  fi
 
   # Link restart files
-  local ww3_restart_file
-  # Use restart_date if it was determined above, otherwise use initialization date
   for (( vdate = first_ww3_restart_out; vdate <= forecast_end_cycle;
          vdate = $(date --utc -d "${vdate:0:8} ${vdate:8:2} + ${restart_interval} hours" +%Y%m%d%H) )); do
     ww3_restart_file="${vdate:0:8}.${vdate:8:2}0000.restart.ww3"
diff --git a/versions/ic.ver b/versions/ic.ver
new file mode 100644
index 0000000000..e7bd8358ef
--- /dev/null
+++ b/versions/ic.ver
@@ -0,0 +1,22 @@
+#!/bin/bash
+# Initial condition subfolder versions
+
+#shellcheck disable=SC2034
+declare -A ic_versions
+
+ic_versions['C48']=20241120
+ic_versions['C48mx500']=20241120
+ic_versions['C48C48mx500']=20241120
+
+ic_versions['C96']=20241120
+ic_versions['C96C48']=20241120
+ic_versions['C96mx100']=20240610
+
+ic_versions['C384C192']=20240610
+ic_versions['C384mx025']=20241120
+
+ic_versions['C768']=20241120
+ic_versions['C768mx025']=20241120
+
+ic_versions['C1152']=20241120
+ic_versions['C1152mx025']=20241120