International Cloud Atlas
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Ac flo compared with Cu

(Section 2.3.4.6.5)

Altocumulus floccus is distinguished from Cumulus fractus, humilis and mediocris by:

  • Often having fibrous trails (virga) compared to the usually flat base of the Cumulus
  • Generally being smaller than Cumulus
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The text enclosed in grey-shaded boxes, like this example, comprises Annex I to the Technical Regulations (WMO-No. 49) and has the legal status of standard practices and procedures.

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