Incus

(Section 2.2.2.4.1)

The upper portion of a Cumulonimbus spread out in the shape of an anvil with a smooth, fibrous or striated appearance

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.

Incus

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