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Thread: METAR QNH
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Old 14th Jun 2019, 10:34
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NaFenn
 
Join Date: Mar 2008
Location: Perth, Australia
Posts: 61
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A "Valid QNH" Must be from a spoken source and is valid for 15 minutes. AWS, ATIS and Observers report the QNH At that exact time (hence why it is valid for 15 mins from then), where as the METAR, as Aerocat said, Can be up to 30 minutes old.
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