Under CAVOK, which weather phenomenon is explicitly disallowed as significant?

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Multiple Choice

Under CAVOK, which weather phenomenon is explicitly disallowed as significant?

Explanation:
CAVOK means Ceiling And Visibility OK—excellent visibility (usually 10 km or more) and no significant weather phenomena at the station or in the vicinity. That explicit condition includes no precipitation, which is a weather phenomenon that would impair conditions. Rain, as a form of precipitation, would break the CAVOK status, so it is disallowed as significant under this reporting. While other obscuring phenomena like fog or dust would also violate CAVOK because they affect visibility, precipitation is the category highlighted here as the explicit disqualifier. In practice, if rain is present, the observation would not be labeled CAVOK.

CAVOK means Ceiling And Visibility OK—excellent visibility (usually 10 km or more) and no significant weather phenomena at the station or in the vicinity. That explicit condition includes no precipitation, which is a weather phenomenon that would impair conditions. Rain, as a form of precipitation, would break the CAVOK status, so it is disallowed as significant under this reporting. While other obscuring phenomena like fog or dust would also violate CAVOK because they affect visibility, precipitation is the category highlighted here as the explicit disqualifier. In practice, if rain is present, the observation would not be labeled CAVOK.

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