diff --git a/parm/jcb-gdas/observations/atmosphere/aircraft.yaml.j2 b/parm/jcb-gdas/observations/atmosphere/aircraft.yaml.j2
index 92334a3dd..7e52b2ffc 100644
--- a/parm/jcb-gdas/observations/atmosphere/aircraft.yaml.j2
+++ b/parm/jcb-gdas/observations/atmosphere/aircraft.yaml.j2
@@ -497,10 +497,46 @@
       name: inflate error
       inflation factor: 1.5
     where:
-    - variable: MetaData/instantaneousAltitudeRate
+    - variable: 
+        name: MetaData/instantaneousAltitudeRate
       minvalue: 30.0
 
 
+  # Inflate if IALR < 30
+  - filter: Perform Action
+    filter variables:
+    - name: airTemperature
+    action:
+      name: inflate error
+      inflation factor: 1.5
+    where:
+    - variable: 
+        name: MetaData/instantaneousAltitudeRate
+      maxvalue: -30.0
+
+  # if IALR > 30, reduce IALR to 0.0
+  - filter: Variable Assignment
+    assignments:
+    - name: MetaData/instantaneousAltitudeRate 
+      type: float
+      value: 0.0
+    where:
+    - variable: 
+        name: MetaData/instantaneousAltitudeRate 
+      minvalue: 30.0
+
+  # if IALR < 30, reduce IALR to 0.0
+  - filter: Variable Assignment
+    assignments:
+    - name: MetaData/instantaneousAltitudeRate
+      type: float
+      value: 0.0
+    where:
+    - variable:
+        name: MetaData/instantaneousAltitudeRate
+      maxvalue: -30.0
+
+
   obs prior filters:
 
   # Calculates ratio_errors from GSI