diff --git a/python/idsse/testing/data_access/new_data_issue_message.json b/python/idsse/testing/data_access/new_data_issue_message.json
new file mode 100644
index 0000000..0fde471
--- /dev/null
+++ b/python/idsse/testing/data_access/new_data_issue_message.json
@@ -0,0 +1,57 @@
+{
+  "product": "NBM",
+  "region": "CONUS",
+  "issueDt": "2024-12-20T19:00:00.000Z",
+  "field": {
+    "2024-12-20T20:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-20T21:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-20T22:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-20T23:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-21T00:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ]
+  }
+}
diff --git a/python/idsse/testing/data_access/new_data_issue_message_missing.json b/python/idsse/testing/data_access/new_data_issue_message_missing.json
new file mode 100644
index 0000000..9b4230e
--- /dev/null
+++ b/python/idsse/testing/data_access/new_data_issue_message_missing.json
@@ -0,0 +1,64 @@
+{
+  "product": "NBM",
+  "region": "CONUS",
+  "issueDt": "2024-12-20T19:00:00.000Z",
+  "field": {
+    "2024-12-20T20:00:00.000Z": [],
+    "2024-12-20T21:00:00.000Z": [],
+    "2024-12-20T22:00:00.000Z": [],
+    "2024-12-20T23:00:00.000Z": [],
+    "2024-12-21T00:00:00.000Z": []
+  },
+  "missing": {
+    "2024-12-20T20:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-20T21:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-20T22:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-20T23:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ],
+    "2024-12-21T00:00:00.000Z": [
+      "WINDGUST",
+      "DEWPOINT",
+      "WINDSPEED",
+      "RAIN1HR",
+      "SNOW1HR",
+      "TEMP",
+      "ICE1HR",
+      "RH"
+    ]
+  }
+}