diff --git a/lib/xmet/raob.py b/lib/xmet/raob.py
index 7ee98af..82d0dbc 100644
--- a/lib/xmet/raob.py
+++ b/lib/xmet/raob.py
@@ -25,7 +25,9 @@ class RAOBSounding():
     def __init__(self, station: str, timestamp: str):
         self.station   = station
         self.timestamp = timestamp
-        self.samples   = dict()
+
+        self.samples_by_pressure = dict()
+        self.samples_by_height   = dict()
 
     def parse_timestamp(self, token: str):
         if token[0:2] == '//':
@@ -58,14 +60,14 @@ class RAOBSounding():
         sounding.timestamp_observed   = timestamp
         sounding.timestamp_released   = timestamp - datetime.timedelta(minutes=45)
 
-        for pressure in sorted(self.samples.keys(), reverse=True):
-            sounding.samples.append(self.samples[pressure])
+        for pressure in sorted(self.samples_by_pressure.keys(), reverse=True):
+            sounding.samples.append(self.samples_by_pressure[pressure])
 
         return sounding
 
-    def sample(self, pressure: float):
-        if pressure in self.samples:
-            return self.samples[pressure]
+    def sample_by_pressure(self, pressure: float):
+        if pressure in self.samples_by_pressure:
+            return self.samples_by_pressure[pressure]
 
         sample = SoundingSample()
         sample.pressure    = pressure
@@ -73,19 +75,42 @@ class RAOBSounding():
         sample.height_qa   = ' '
         sample.temp_qa     = ' '
 
-        self.samples[pressure] = sample
+        self.samples_by_pressure[pressure] = sample
+
+        return sample
+
+    def sample_by_height(self, height: float):
+        if height in self.samples_by_height:
+            return self.samples_by_height[height]
+
+        sample = SoundingSample()
+        sample.height = height
+        sample.pressure_qa = ' '
+        sample.height_qa   = ' '
+        sample.temp_qa     = ' '
+
+        self.samples_by_height[height] = sample
 
         return sample
 
     def record_height(self, pressure: float, height: float):
-        sample = self.sample(pressure)
+        if pressure is None:
+            return
+
+        sample = self.sample_by_pressure(pressure)
         sample.height = height
 
+        if height not in self.samples_by_height:
+            self.samples_by_height[height] = sample
+
     def record_temp_dewpoint(self,
                              pressure: float,
                              temp: float,
                              dewpoint: float):
-        sample = self.sample(pressure)
+        if pressure is None:
+            return
+
+        sample = self.sample_by_pressure(pressure)
         sample.temp     = temp
         sample.dewpoint = dewpoint
 
@@ -93,7 +118,10 @@ class RAOBSounding():
                               pressure: float,
                               wind_speed: float,
                               wind_dir: float):
-        sample = self.sample(pressure)
+        if pressure is None:
+            return
+
+        sample = self.sample_by_pressure(pressure)
         sample.wind_speed = wind_speed
         sample.wind_dir   = wind_dir
 
@@ -373,21 +401,29 @@ class RAOBObs():
         }
 
     def parse_ppbb_samples(self, tokens: list[str]) -> dict:
+        ret = dict()
+
         heights = tokens[0]
 
         if heights[0] != '9':
             return dict()
 
-        tens = int(heights[1])
-        h1   = 0.3048 * (10000 * tens) + (1000 * int(heights[2]))
-        h2   = 0.3048 * (10000 * tens) + (1000 * int(heights[3]))
-        h3   = 0.3048 * (10000 * tens) + (1000 * int(heights[4]))
+        if heights[1] != '/':
+            tens = int(heights[1])
 
-        return {
-            h1: self.parse_wind(tokens[1]),
-            h2: self.parse_wind(tokens[2]),
-            h3: self.parse_wind(tokens[3])
-        }
+            if len(heights) > 1 and heights[2] != '/' and len(tokens) > 1:
+                h = 0.3048 * (10000 * tens) + (1000 * int(heights[2]))
+                ret[h] = self.parse_wind(tokens[1])
+
+            if len(heights) > 2 and heights[3] != '/' and len(tokens) > 2:
+                h = 0.3048 * (10000 * tens) + (1000 * int(heights[3]))
+                ret[h] = self.parse_wind(tokens[2])
+
+            if len(heights) > 3 and heights[4] != '/' and len(tokens) > 3:
+                h = 0.3048 * (10000 * tens) + (1000 * int(heights[4]))
+                ret[h] = self.parse_wind(tokens[3])
+
+        return ret
 
     def parse_ppbb(self) -> dict:
         timestamp = self.tokens[0]
@@ -460,6 +496,8 @@ class RAOBChunk():
                 data = obs.parse_ttaa()
             elif obs.kind == 'TTBB':
                 data = obs.parse_ttbb()
+            elif obs.kind == 'PPBB':
+                data = obs.parse_ppbb()
 
             if data is None or len(data['samples']) == 0:
                 continue
@@ -558,10 +596,13 @@ class RAOBReader():
                 sounding = self.sounding(station, timestamp)
 
                 for data in samples:
-                    pressure = data['pressure']
+                    pressure = data.get('pressure')
+                    height   = data.get('height')
 
-                    if pressure is None:
-                        continue
+                    if pressure is None and height is not None:
+                        sample = sounding.sample_by_height(height)
+                        sample.wind_speed = data.get('wind_speed')
+                        sample.wind_dir   = data.get('wind_dir')
 
                     sounding.record_height(pressure, data.get('height'))