diff --git a/aprslib/parsing.py b/aprslib/parsing.py
index b977129..d63d93a 100644
--- a/aprslib/parsing.py
+++ b/aprslib/parsing.py
@@ -162,10 +162,9 @@ def parse(packet):
         # \ - unused
         # ] - unused
         # ^ - unused
-        # _ - positionless weather report
         # { - user defined
         # } - 3rd party traffic
-        if packet_type in '#$%)*,<?T[_{}':
+        if packet_type in '#$%)*,<?T[{}':
             raise UnknownFormat("format is not supported", packet)
 
         # STATUS PACKET
@@ -197,6 +196,23 @@ def parse(packet):
             body, result = _parse_message(body)
             parsed.update(result)
 
+        # POSITIONLESS WEATHER REPORT
+        elif packet_type == '_':
+            logger.debug("Attempting to parse as positionless weather report")
+
+            match = re.match("^(\d{8})c[\. \d]{3}s[\. \d]{3}g[\. \d]{3}t[\. \d]{3}", body)
+            if not match:
+                raise ParseError("invalid positionless weather report format")
+
+            comment, weather = _parse_weather_data(body[8:])
+
+            parsed.update({
+                'format': 'wx',
+                'wx_raw_timestamp': match.group(1),
+                'comment': comment.strip(' '),
+                'weather': weather,
+                })
+
         # postion report (regular or compressed)
         elif (packet_type in '!=/@;' or
               0 <= body.find('!') < 40):  # page 28 of spec (PDF)
@@ -243,10 +259,19 @@ def parse(packet):
                     logger.debug("Parsed as normal position report")
                 else:
                     raise ParseError("invalid format")
-
-            # decode comment
-            body, result = _parse_comment(body)
-            parsed.update(result)
+            # check comment for weather information
+            # Page 62 of the spec
+            if parsed['symbol'] == '_':
+                logger.debug("Attempting to parse weather report from comment")
+                body, result = _parse_weather_data(body)
+                parsed.update({
+                    'comment': body.strip(' '),
+                    'weather': result,
+                    })
+            else:
+                # decode comment
+                body, result = _parse_comment(body)
+                parsed.update(result)
 
             if packet_type == ';':
                 parsed.update({
@@ -396,9 +421,8 @@ def _parse_timestamp(body, packet_type=''):
 
 def _parse_comment(body):
     parsed = {}
-
     # attempt to parse remaining part of the packet (comment field)
-    # try CRS/SPD/
+    # try CRS/SPD
     match = re.findall(r"^([0-9]{3})/([0-9]{3})", body)
     if match:
         cse, spd = match[0]
@@ -926,3 +950,55 @@ def _parse_normal(body):
             })
 
     return (body, parsed)
+
+
+def _parse_weather_data(body):
+    wind_multiplier = 0.44704
+    rain_multiplier = 0.254
+
+    key_map = {
+        'g': 'wind_gust',
+        'c': 'wind_direction',
+        't': 'temperature',
+        'S': 'wind_speed',
+        'r': 'rain_1h',
+        'p': 'rain_24h',
+        'P': 'rain_since_midnight',
+        'h': 'humidity',
+        'b': 'pressure',
+        'l': 'luminosity',
+        'L': 'luminosity',
+        's': 'snow',
+        '#': 'rain_raw',
+    }
+    val_map = {
+        'g': lambda x: int(x) * wind_multiplier,
+        'c': lambda x: int(x),
+        'S': lambda x: int(x) * wind_multiplier,
+        't': lambda x: (float(x) - 32) / 1.8,
+        'r': lambda x: int(x) * rain_multiplier,
+        'p': lambda x: int(x) * rain_multiplier,
+        'P': lambda x: int(x) * rain_multiplier,
+        'h': lambda x: int(x),
+        'b': lambda x: float(x) / 10,
+        'l': lambda x: int(x) + 1000,
+        'L': lambda x: int(x),
+        's': lambda x: float(x) * 25.4,
+        '#': lambda x: int(x),
+    }
+
+    parsed = {}
+
+    # parse weather data
+    body = re.sub(r"^([0-9]{3})/([0-9]{3})", "c\\1s\\2", body)
+    body = body.replace('s', 'S', 1)
+
+    data = re.findall(r"([cSgtrpPlLs#]\d{3}|t-\d{2}|h\d{2}|b\d{5}|s\.\d{2}|s\d\.\d)", body)
+    data = map(lambda x: (key_map[x[0]] , val_map[x[0]](x[1:])), data)
+
+    parsed.update(dict(data))
+
+    # strip weather data
+    body = re.sub(r"([cSgtrpPlLs#][0-9\-\. ]{3}|h[0-9\. ]{2}|b[0-9\. ]{5})", '', body)
+
+    return (body, parsed)
diff --git a/tests/test_parse_weather_data.py b/tests/test_parse_weather_data.py
new file mode 100644
index 0000000..cbc74b7
--- /dev/null
+++ b/tests/test_parse_weather_data.py
@@ -0,0 +1,260 @@
+import unittest2 as unittest
+
+from aprslib.parsing import _parse_weather_data
+from aprslib.parsing import parse
+
+wind_multiplier = 0.44704
+mm_multiplier = 0.254
+
+class ParseCommentWeather(unittest.TestCase):
+    def setUp(self):
+        self.maxDiff = None
+
+    def test_wind(self):
+        # misc value
+        expected = "", {
+            "wind_speed": (9 * wind_multiplier),
+            "wind_direction": 9
+        }
+        result = _parse_weather_data("009/009")
+        self.assertEqual(expected, result)
+
+        # Daft result but possible
+        expected = "", {
+            "wind_speed": (999 * wind_multiplier),
+            "wind_direction": 999
+        }
+        result = _parse_weather_data("999/999")
+        self.assertEqual(expected, result)
+
+        #Positionless packet
+        expected = "", {
+            "wind_speed": float(9 * wind_multiplier),
+            "wind_direction": 9
+        }
+        result = _parse_weather_data("c009s009")
+        self.assertEqual(expected, result)
+
+        # Daft result but possible
+        expected = "", {
+            "wind_speed": (999 * wind_multiplier),
+            "wind_direction": 999
+        }
+        result = _parse_weather_data("c999s999")
+        self.assertEqual(expected, result)
+
+    def test_temp(self):
+        # Min
+        expected = "", {
+            "temperature": float((-99.0 - 32) / 1.8)
+        }
+        result = _parse_weather_data("t-99")
+        self.assertEqual(expected, result)
+
+        # Misc
+        expected = "", {
+            "temperature": -40.0
+        }
+        result = _parse_weather_data("t-40")
+        self.assertEqual(expected, result)
+
+        # Zero F
+        expected = "", {
+            "temperature": -17.77777777777778
+        }
+        result = _parse_weather_data("t000")
+        self.assertEqual(expected, result)
+
+        # Daft, but possible
+        expected = "", {
+            "temperature": 537.2222222222222
+        }
+        result = _parse_weather_data("t999")
+        self.assertEqual(expected, result)
+
+    def test_rain_1h(self):
+        expected = "", {
+            "rain_1h": 0.0
+        }
+        result = _parse_weather_data("r000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "rain_1h": float(999 * mm_multiplier)
+        }
+        result = _parse_weather_data("r999")
+        self.assertEqual(expected, result)
+
+    def test_rain_24h(self):
+        expected = "", {
+            "rain_24h": 0.0
+        }
+        result = _parse_weather_data("p000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "rain_24h": float(999 * mm_multiplier)
+        }
+        result = _parse_weather_data("p999")
+        self.assertEqual(expected, result)
+
+    def test_rain_since_midnight(self):
+        expected = "", {
+            "rain_since_midnight": 0.0
+        }
+        result = _parse_weather_data("P000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "rain_since_midnight": float(999 * mm_multiplier)
+        }
+        result = _parse_weather_data("P999")
+        self.assertEqual(expected, result)
+
+    def test_humidity(self):
+        expected = "", {
+            "humidity": 0.0
+        }
+        result = _parse_weather_data("h00")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "humidity": 99
+        }
+        result = _parse_weather_data("h99")
+        self.assertEqual(expected, result)
+
+    def test_pressure(self):
+        expected = "", {
+            "pressure": 0.0
+        }
+        result = _parse_weather_data("b00000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "pressure": 9999.9
+        }
+        result = _parse_weather_data("b99999")
+        self.assertEqual(expected, result)
+
+    def test_luminosity(self):
+        expected = "", {
+            "luminosity": 000
+        }
+        result = _parse_weather_data("L000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "luminosity": 999
+        }
+        result = _parse_weather_data("L999")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "luminosity": 1123
+        }
+        result = _parse_weather_data("l123")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "luminosity": 1999
+        }
+        result = _parse_weather_data("l999")
+        self.assertEqual(expected, result)
+
+    def test_snow(self):
+        expected = "", {
+            "snow": 000
+        }
+        result = _parse_weather_data("s...s000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "snow": float(5.5 * 25.4)
+        }
+        result = _parse_weather_data("s...s5.5")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "snow": float(999 * 25.4)
+        }
+        result = _parse_weather_data("s...s999")
+        self.assertEqual(expected, result)
+
+    def test_rain_raw(self):
+        expected = "", {
+            "rain_raw": 000
+        }
+        result = _parse_weather_data("#000")
+        self.assertEqual(expected, result)
+
+        expected = "", {
+            "rain_raw": 999
+        }
+        result = _parse_weather_data("#999")
+        self.assertEqual(expected, result)
+
+    # Not possible in real world (rain and snow measurements)
+    def test_positionless_packet(self):
+
+        expected = {
+            'comment': 'wRSW',
+            'format': 'wx',
+            'from': 'A',
+            'path': [],
+            'raw': 'A>B:_10090556c220s004g005t077r010p020P030h50b09900s5.5wRSW',
+            'to': 'B',
+            'via': '',
+            'wx_raw_timestamp': '10090556',
+            "weather": {
+                "pressure": 990.0,
+                "humidity": 50,
+                "rain_1h": float(010.0 * mm_multiplier),
+                "rain_24h": float(020.0 * mm_multiplier),
+                "rain_since_midnight": float(030.0 * mm_multiplier),
+                "snow": float(5.5 * 25.4),
+                "temperature": float((77.0 - 32) / 1.8),
+                "wind_direction": 220,
+                "wind_gust": 5.0 * wind_multiplier,
+                "wind_speed": 4.0 * wind_multiplier
+            }
+        }
+
+        packet = "A>B:_10090556c220s004g005t077r010p020P030h50b09900s5.5wRSW"
+
+        self.assertEqual(expected, parse(packet))
+
+        packet2 = "A>B:_10090556c220s112g   t   r   h  b     wRSW"
+        expected['raw'] = packet2
+        expected['weather'] = {
+            "wind_direction": 220,
+            "wind_speed": 112 * wind_multiplier
+        }
+
+        self.assertEqual(expected, parse(packet2))
+
+        packet3 = "A>B:_10090556c220s112g...t...r...p...P...b.....wRSW"
+        expected['raw'] = packet3
+        expected['weather'] = {
+            "wind_direction": 220,
+            "wind_speed": 112 * wind_multiplier
+        }
+
+        self.assertEqual(expected, parse(packet3))
+
+    def test_position_packet(self):
+        expected = "eCumulusWMR100", {
+            "pressure": 1029.4,
+            "humidity": 19,
+            "rain_since_midnight": 0.0,
+            "temperature": (48.0 - 32) / 1.8,
+            "wind_direction": 319,
+            "wind_gust": 4.0 * wind_multiplier,
+            "wind_speed": 1 * wind_multiplier
+        }
+
+        result = _parse_weather_data("319/001g004t048r...p   P000h19b10294eCumulusWMR100")
+        self.assertEqual(expected, result)
+
+if __name__ == '__main__':
+    unittest.main()