Altocumulus duplicatus (Ac du) - Maze 1889, De Quervain 1908, CEN 1926

(Section 2.3.4.3.4)

Altocumulus of two or more superposed patches, sheets or layers, close together and sometimes partly merged. This variety occurs in the species stratiformis and lenticularis.

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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.

Altocumulus duplicatus (Ac du) - Maze 1889, De Quervain 1908, CEN 1926

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