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 ):

Spacing issue
sky: overcastcumulonimbus at 1000 feet

should read

sky: overcast^cumulonimbus at 1000 feet
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' )

pip install -e .[dev]
parse_log_pytest
pytest
nose coveralls pytest
3.6
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
attrs @ file:///opt/conda/conda-bld/attrs_1642510447205/work
certifi==2021.5.30
charset-normalizer==2.0.12
coverage==6.2
coveralls==3.3.1
docopt==0.6.2
idna==3.10
importlib-metadata @ file:///tmp/build/80754af9/importlib-metadata_1631916693255/work
iniconfig @ file:///home/linux1/recipes/ci/iniconfig_1610983019677/work
-e git+https://github.com/python-metar/python-metar.git@b9e9aec2a429d2512ec931ce8cf6b281abacc5e5#egg=metar
more-itertools @ file:///tmp/build/80754af9/more-itertools_1637733554872/work
nose==1.3.7
packaging @ file:///tmp/build/80754af9/packaging_1637314298585/work
pluggy @ file:///tmp/build/80754af9/pluggy_1615976315926/work
py @ file:///opt/conda/conda-bld/py_1644396412707/work
pyparsing @ file:///tmp/build/80754af9/pyparsing_1635766073266/work
pytest==6.2.4
requests==2.27.1
toml @ file:///tmp/build/80754af9/toml_1616166611790/work
typing_extensions @ file:///opt/conda/conda-bld/typing_extensions_1647553014482/work
urllib3==1.26.20
zipp @ file:///tmp/build/80754af9/zipp_1633618647012/work

name: python-metar
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - attrs=21.4.0=pyhd3eb1b0_0
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - importlib-metadata=4.8.1=py36h06a4308_0
  - importlib_metadata=4.8.1=hd3eb1b0_0
  - iniconfig=1.1.1=pyhd3eb1b0_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - more-itertools=8.12.0=pyhd3eb1b0_0
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - packaging=21.3=pyhd3eb1b0_0
  - pip=21.2.2=py36h06a4308_0
  - pluggy=0.13.1=py36h06a4308_0
  - py=1.11.0=pyhd3eb1b0_0
  - pyparsing=3.0.4=pyhd3eb1b0_0
  - pytest=6.2.4=py36h06a4308_2
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - toml=0.10.2=pyhd3eb1b0_0
  - typing_extensions=4.1.1=pyh06a4308_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zipp=3.6.0=pyhd3eb1b0_0
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - charset-normalizer==2.0.12
      - coverage==6.2
      - coveralls==3.3.1
      - docopt==0.6.2
      - idna==3.10
      - nose==1.3.7
      - requests==2.27.1
      - urllib3==1.26.20
prefix: /opt/conda/envs/python-metar

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
metar/Metar.py
metar/Metar.py