Editing Cumulus cloud (section)

=== Altocumulus clouds ===
[[File:Altocumulus stratiformis clouds-01.jpg|thumb|Altocumulus clouds]]
{{main article|Altocumulus cloud}}
Altocumulus clouds are a mid-level cloud that forms from {{convert|2000|m|ft}} high to {{convert|4000|m|ft}} in polar areas, {{convert|7000|m|ft}} in temperate areas, and {{convert|7600|m|ft}} in tropical areas.<ref name="nws-jetstream">{{cite web|title=Cloud Classifications|url=http://oceanservice.noaa.gov/education/yos/resource/JetStream/synoptic/clouds_max.htm|url-status=dead|archive-url=https://web.archive.org/web/20141107063301/http://oceanservice.noaa.gov/education/yos/resource/JetStream/synoptic/clouds_max.htm|archive-date=7 November 2014|access-date=21 July 2014|work=JetStream|publisher=National Weather Service}}</ref> They can have precipitation and are commonly composed of a mixture of ice crystals, supercooled water droplets, and water droplets in temperate latitudes. However, the liquid water concentration was almost always significantly greater than the concentration of ice crystals, and the maximum concentration of liquid water tended to be at the top of the cloud while the ice concentrated itself at the bottom.<ref name="Carey2490">{{harvnb|Carey et al.|2008|p=2490}}</ref><ref name="Carey2491">{{harvnb|Carey et al.|2008|p=2491}}</ref> The ice crystals in the base of the altocumulus clouds and in the virga were found to be dendrites or conglomerations of dendrites while needles and plates resided more towards the top.<ref name="Carey2491" /> Altocumulus clouds can form via convection or via the forced uplift caused by a [[warm front]].<ref name="Carey2494">{{harvnb|Carey et al.|2008|p=2494}}</ref>