diff --git a/lib/xmet/raob.py b/lib/xmet/raob.py
index 8315a65..6b7a955 100644
--- a/lib/xmet/raob.py
+++ b/lib/xmet/raob.py
@@ -123,11 +123,8 @@ class RAOBSounding():
 
         sample = self.sample_by_pressure(pressure)
 
-        if sample.temp is None:
-            sample.temp = temp
-
-        if sample.dewpoint is None:
-            sample.dewpoint = dewpoint
+        sample.temp     = temp
+        sample.dewpoint = dewpoint
 
     def record_wind_speed_dir(self,
                               pressure: float,
@@ -138,11 +135,8 @@ class RAOBSounding():
 
         sample = self.sample_by_pressure(pressure)
 
-        if sample.wind_speed is None:
-            sample.wind_speed = wind_speed
-
-        if sample.wind_dir is None:
-            sample.wind_dir = wind_dir
+        sample.wind_speed = wind_speed
+        sample.wind_dir   = wind_dir
 
 class RAOBObs():
     DATA_SOURCE = 'UCAR'