diff --git a/algorithm/snow/snow_obs_staging.yaml.j2 b/algorithm/snow/snow_obs_staging.yaml.j2
index a8d3dc8..778cfd1 100644
--- a/algorithm/snow/snow_obs_staging.yaml.j2
+++ b/algorithm/snow/snow_obs_staging.yaml.j2
@@ -1,6 +1,6 @@
 mkdir:
     - '{{snow_obsdatain_path}}'
-copy:
+copy_opt:
     {% for observation_from_jcb in observations %}
       {% if use_observer(observation_from_jcb) %}
         {% if not observation_from_jcb == 'ims_snow' %}
diff --git a/observations/snow/adpsfc_snow.yaml.j2 b/observations/snow/adpsfc_snow.yaml.j2
index f0fe2fd..6298cc0 100644
--- a/observations/snow/adpsfc_snow.yaml.j2
+++ b/observations/snow/adpsfc_snow.yaml.j2
@@ -8,6 +8,7 @@
       engine:
         type: H5File
         obsfile: "{{snow_obsdatain_path}}/{{snow_obsdatain_prefix}}{{observation_from_jcb}}{{snow_obsdatain_suffix}}"
+        missing file action: warn
     obsdataout:
       engine:
         type: H5File
diff --git a/observations/snow/ghcn_snow.yaml.j2 b/observations/snow/ghcn_snow.yaml.j2
index ea7a956..b825e79 100644
--- a/observations/snow/ghcn_snow.yaml.j2
+++ b/observations/snow/ghcn_snow.yaml.j2
@@ -8,6 +8,7 @@
       engine:
         type: H5File
         obsfile: "{{snow_obsdatain_path}}/{{snow_obsdatain_prefix}}{{observation_from_jcb}}.nc"
+        missing file action: warn
     obsdataout:
       engine:
         type: H5File
diff --git a/observations/snow/sfcsno.yaml.j2 b/observations/snow/sfcsno.yaml.j2
index ce44417..31c8785 100644
--- a/observations/snow/sfcsno.yaml.j2
+++ b/observations/snow/sfcsno.yaml.j2
@@ -9,6 +9,7 @@
         type: bufr
         obsfile: "{{snow_obsdatain_path}}/{{snow_obsdatain_prefix}}sfcsno.tm00.bufr_d"
         mapping file: "{{snow_obsdatain_path}}/bufr_sfcsno_mapping.yaml"
+        missing file action: warn
     obsdataout:
       engine:
         type: H5File
diff --git a/observations/snow/snocvr_snow.yaml.j2 b/observations/snow/snocvr_snow.yaml.j2
index fe73587..c38da08 100644
--- a/observations/snow/snocvr_snow.yaml.j2
+++ b/observations/snow/snocvr_snow.yaml.j2
@@ -8,6 +8,7 @@
       engine:
         type: H5File
         obsfile: "{{snow_obsdatain_path}}/{{snow_obsdatain_prefix}}{{observation_from_jcb}}.nc4"
+        missing file action: warn
     obsdataout:
       engine:
         type: H5File