diff --git a/ush/config.sh.RRFS_AK_dev1 b/ush/config.sh.RRFS_AK_dev1
index a8fbd8b35..ef87cb820 100644
--- a/ush/config.sh.RRFS_AK_dev1
+++ b/ush/config.sh.RRFS_AK_dev1
@@ -97,7 +97,7 @@ if [[ -n $RESERVATION ]] ; then
 fi
 
 WTIME_RUN_FCST="03:00:00"
-DT_ATMOS=30
+DT_ATMOS=40
 
 EXTRN_MDL_NAME_ICS="RAP"
 EXTRN_MDL_NAME_LBCS="RAP"