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The presence of Altocumulus clouds can indicate a change in weather, often preceding a cold front or a storm, but they don't necessarily mean rain is imminent.
Dark shelfcloud preceding heavy thunderstorm at windturbine park
Examples
Offida. Town Hall. Built between the 13th and 14th centuries (central crenellated tower). The façade is preceded by a 7-arched portico with an elegant 14-arched loggia raised in the 15th century.

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