diff --git a/metar/Metar.py b/metar/Metar.py
index 338e172..c089afb 100755
--- a/metar/Metar.py
+++ b/metar/Metar.py
@@ -1216,12 +1216,14 @@ class Metar(object):
                   what = "clouds"
               else: 
                   what = ""
+              label = "%s %s" % (SKY_COVER[cover], what)
+              # HACK here to account for 'empty' entries with above format
+              label = " ".join(label.strip().split())
               if cover == "VV":
-                  text_list.append("%s%s, vertical visibility to %s" % 
-                          (SKY_COVER[cover],what,str(height)))
+                  label += ", vertical visibility to %s" % (str(height), )
               else:
-                  text_list.append("%s%s at %s" % 
-                          (SKY_COVER[cover],what,str(height)))
+                  label += " at %s" % (str(height), )
+              text_list.append(label)
       return sep.join(text_list)
           
   def trend( self ):

diff --git a/test/test_metar.py b/test/test_metar.py
index e6c8fee..990b7b0 100644
--- a/test/test_metar.py
+++ b/test/test_metar.py
@@ -457,6 +457,9 @@ class MetarTest(unittest.TestCase):
     self.assertEqual( report('SCT030').sky_conditions(), 'scattered clouds at 3000 feet' )
     self.assertEqual( report('BKN001').sky_conditions(), 'broken clouds at 100 feet' )
     self.assertEqual( report('OVC008').sky_conditions(), 'overcast at 800 feet' )
+    self.assertEqual(
+      report('OVC010CB').sky_conditions(), 'overcast cumulonimbus at 1000 feet'
+    )
     self.assertEqual( report('SCT020TCU').sky_conditions(), 'scattered towering cumulus at 2000 feet' )
     self.assertEqual( report('BKN015CB').sky_conditions(), 'broken cumulonimbus at 1500 feet' )
     self.assertEqual( report('FEW030').sky_conditions(), 'a few clouds at 3000 feet' )

Spacing issue
sky: overcastcumulonimbus at 1000 feet

should read

sky: overcast^cumulonimbus at 1000 feet
test/test_metar.py::MetarTest::test_310_parse_sky_conditions
test/test_metar.py::MetarTest::test_010_parseType_default test/test_metar.py::MetarTest::test_011_parseType_legal test/test_metar.py::MetarTest::test_020_parseStation_legal test/test_metar.py::MetarTest::test_021_parseStation_illegal test/test_metar.py::MetarTest::test_030_parseTime_legal test/test_metar.py::MetarTest::test_031_parseTime_specify_year test/test_metar.py::MetarTest::test_032_parseTime_specify_month test/test_metar.py::MetarTest::test_033_parseTime_auto_month test/test_metar.py::MetarTest::test_034_parseTime_auto_year test/test_metar.py::MetarTest::test_035_parseTime_suppress_auto_month test/test_metar.py::MetarTest::test_040_parseModifier_default test/test_metar.py::MetarTest::test_041_parseModifier test/test_metar.py::MetarTest::test_042_parseModifier_nonstd test/test_metar.py::MetarTest::test_043_parseModifier_illegal test/test_metar.py::MetarTest::test_140_parseWind test/test_metar.py::MetarTest::test_141_parseWind_nonstd test/test_metar.py::MetarTest::test_142_parseWind_illegal test/test_metar.py::MetarTest::test_150_parseVisibility test/test_metar.py::MetarTest::test_151_parseVisibility_direction test/test_metar.py::MetarTest::test_152_parseVisibility_with_following_temperature test/test_metar.py::MetarTest::test_290_ranway_state test/test_metar.py::MetarTest::test_300_parseTrend test/test_metar.py::MetarTest::test_issue40_runwayunits test/test_metar.py::MetarTest::test_not_strict_mode test/test_metar.py::MetarTest::test_snowdepth