diff --git a/env/WCOSS2.env b/env/WCOSS2.env
index d2dae3ba93..cea24fb26b 100755
--- a/env/WCOSS2.env
+++ b/env/WCOSS2.env
@@ -272,12 +272,12 @@ elif [[ "${step}" = "postsnd" ]]; then
     export OMP_NUM_THREADS=1
 
     export NTHREADS_POSTSND=${NTHREADS1}
-    export mpmd_opt="-ppn 21 ${mpmd_opt}"
-
     export NTHREADS_POSTSNDCFP=${threads_per_task_postsndcfp:-1}
     [[ ${NTHREADS_POSTSNDCFP} -gt ${max_threads_per_task} ]] && export NTHREADS_POSTSNDCFP=${max_threads_per_task}
     export APRUN_POSTSNDCFP="${launcher} -np ${ntasks_postsndcfp} ${mpmd_opt}"
 
+    export mpmd_opt="-ppn ${tasks_per_node} ${mpmd_opt}"
+
 elif [[ "${step}" = "awips" ]]; then
 
     export NTHREADS_AWIPS=${NTHREADS1}
diff --git a/parm/config/gfs/config.resources b/parm/config/gfs/config.resources
index a89c72e951..afc5939fcd 100644
--- a/parm/config/gfs/config.resources
+++ b/parm/config/gfs/config.resources
@@ -1208,9 +1208,23 @@ case ${step} in
   "postsnd")
     walltime="02:00:00"
     export ntasks=141
-    threads_per_task=6
-    export tasks_per_node=21 
     export ntasks_postsndcfp=9
+    case ${CASE} in
+      "C768")
+        tasks_per_node=21
+        threads_per_task=6
+        memory="23GB"
+        ;;
+      "C1152")
+        tasks_per_node=9
+        threads_per_task=14
+        memory="50GB"
+        ;;
+      *)
+        tasks_per_node=21
+        threads_per_task=6
+        ;;
+    esac
     export tasks_per_node_postsndcfp=1
     postsnd_req_cores=$(( tasks_per_node * threads_per_task ))
     if (( postsnd_req_cores > max_tasks_per_node )); then