Editing Wall cloud (section)

=== Associated features ===
[[File:Wall Cloud in NE Colorado.jpg|thumb|left|A wall cloud with '''tail cloud'''.]]
Some wall clouds have a feature similar to an "eye", as in a [[mesoscale convective vortex]].

Attached to many wall clouds, especially in moist environments, is a '''cauda'''<ref name=ICA2017/> ('''tail cloud'''), a tail-like band of cloud extending from the wall cloud toward the [[precipitation]] core.<ref name=":0">{{Cite web |date=July 20, 2021 |title=Cauda &#124; International Cloud Atlas |url=https://cloudatlas.wmo.int/en/clouds-supplementary-features-cauda.html |archive-url=https://web.archive.org/web/20210720112818/https://cloudatlas.wmo.int/en/clouds-supplementary-features-cauda.html |archive-date=2021-07-20}}</ref> It can be thought of as an extension of the wall cloud in that the tail cloud is connected to the wall cloud and condensation forms for a similar reason.{{Citation needed|date=July 2024}} Cloud elements may be seen to be moving into the wall cloud, as it is also an inflow feature.<ref name=":0" /> Most movement is horizontal, but some rising motion is also often apparent at the junction between the tail cloud and the wall cloud.<ref name=":0" />

Some wall clouds also have a band of cloud fragments encircling the top of the wall cloud where it meets the ambient cloud base; this feature is a '''collar cloud'''.<ref>{{cite book |last = Branick |first = Michael L. |title = NOAA Technical Memorandum NWS SR-145: A Comprehensive Glossary of Weather Terms for Storm Spotters |publisher = National Weather Service |date = 1996 |url = http://www.srh.noaa.gov/oun/?n=spotterglossary2#Collar%20Cloud |oclc = 39732655 }}</ref>

Another accessory cloud is the '''flumen''', commonly known as the '''beaver's tail'''.<ref name="ICA2017" /> It is formed by the warm, humid [[inflow (meteorology)|inflow]] of a strong thunderstorm, and is often mistaken for tornadoes.<ref name="ICA2017" /> Although the presence of a flumen is associated with tornado risk,{{Citation needed|date=July 2024}} the flumen does not rotate.<ref name="ICA2017" />