Cloud symbol C<sub>L</sub> 3. Cumulonimbus, the summits of which, at least partially, lack sharp outlines but are neither clearly fibrous (cirriform) nor in the form of an anvil; cumulus, stratocumulus or stratus may also be present (cumulonimbus calvus).
<a href="//commons.wikimedia.org/wiki/User:Actam" title="User:Actam">Actam</a>
2008-04-18
This file was derived from: <a href="//commons.wikimedia.org/wiki/File:CL_3.png" title="File:CL 3.png">CL 3.png</a><br> (<a rel="nofollow" class="external free" href="http://www.srh.noaa.gov/srh/jetstream/clouds/cloudchart.htm">http://www.srh.noaa.gov/srh/jetstream/clouds/cloudchart.htm</a> see linked subpages by NOAA)