diff --git a/ush/forecast_postdet.sh b/ush/forecast_postdet.sh
index 1c0c50de206..fd1ef9a078d 100755
--- a/ush/forecast_postdet.sh
+++ b/ush/forecast_postdet.sh
@@ -89,15 +89,20 @@ FV3_postdet() {
         fi
       done
 
-      # Need a coupler.res when doing IAU
+      # Need a coupler.res that is consistent with the model start time
       if [[ "${DOIAU}" == "YES" ]]; then
-        rm -f "${DATA}/INPUT/coupler.res"
-        cat >> "${DATA}/INPUT/coupler.res" << EOF
-        3        (Calendar: no_calendar=0, thirty_day_months=1, julian=2, gregorian=3, noleap=4)
-        ${previous_cycle:0:4}  ${previous_cycle:4:2}  ${previous_cycle:6:2}  ${previous_cycle:8:2}  0  0        Model start time: year, month, day, hour, minute, second
-        ${current_cycle_begin:0:4}  ${current_cycle_begin:4:2}  ${current_cycle_begin:6:2}  ${current_cycle_begin:8:2}  0  0        Current model time: year, month, day, hour, minute, second
-EOF
+        local model_start_time="${previous_cycle}"
+        local model_current_time="${current_cycle_begin}"
+      else
+        local model_start_time="${current_cycle}"
+        local model_current_time="${current_cycle}"
       fi
+      rm -f "${DATA}/INPUT/coupler.res"
+      cat >> "${DATA}/INPUT/coupler.res" << EOF
+      3        (Calendar: no_calendar=0, thirty_day_months=1, julian=2, gregorian=3, noleap=4)
+      ${model_start_time:0:4}  ${model_start_time:4:2}  ${model_start_time:6:2}  ${model_start_time:8:2}  0  0        Model start time: year, month, day, hour, minute, second
+      ${model_current_time:0:4}  ${model_current_time:4:2}  ${model_current_time:6:2}  ${model_current_time:8:2}  0  0        Current model time: year, month, day, hour, minute, second
+EOF
 
       # Create a array of increment files
       local inc_files inc_file iaufhrs iaufhr
diff --git a/ush/forecast_predet.sh b/ush/forecast_predet.sh
index 6605a9fa95e..a5944d5bd2e 100755
--- a/ush/forecast_predet.sh
+++ b/ush/forecast_predet.sh
@@ -86,8 +86,18 @@ FV3_predet(){
   FHCYC=${FHCYC:-24}
   restart_interval=${restart_interval:-${FHMAX}}
   # restart_interval = 0 implies write restart at the END of the forecast i.e. at FHMAX
+  # Convert restart interval into an explicit list for FV3
   if (( restart_interval == 0 )); then
     restart_interval=${FHMAX}
+    FV3_RESTART_FH=("${restart_interval}")
+  else
+    # shellcheck disable=SC2312
+    mapfile -t FV3_RESTART_FH < <(seq "${restart_interval}" "${restart_interval}" "${FHMAX}")
+    # If the last forecast hour is not in the array, add it
+    local nrestarts=${#FV3_RESTART_FH[@]}
+    if (( FV3_RESTART_FH[nrestarts-1] != FHMAX )); then
+      FV3_RESTART_FH+=("${FHMAX}")
+    fi
   fi
 
   # Convert output settings into an explicit list for FV3
diff --git a/ush/parsing_model_configure_FV3.sh b/ush/parsing_model_configure_FV3.sh
index 62d023a369a..59d9fb6910d 100755
--- a/ush/parsing_model_configure_FV3.sh
+++ b/ush/parsing_model_configure_FV3.sh
@@ -24,7 +24,7 @@ local SHOUR=${model_start_date:8:2}
 # FHMAX
 local FHROT=${IAU_FHROT:-0}
 local DT_ATMOS=${DELTIM}
-local RESTART_INTERVAL="${restart_interval} -1"
+local RESTART_INTERVAL="${FV3_RESTART_FH[*]}"
 # QUILTING
 local QUILTING_RESTART=".true."
 local WRITE_GROUP=${WRITE_GROUP:-1}