Today\'s Agenda. Aviation Special Weather Report (SPECI)Criteria for taking special weather reportsAWOS ObservationsDifferences from human observations. Aviation Special Weather Report (SPECI). SPECIs will be taken promptly to report changes which occur between scheduled transmission times, whenever one or more of the following elements has changed in the amount specified. The amount of change is with reference to the preceding routine or special observation.Ceiling: The ceiling decreases t9451
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