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Old 25th Feb 2011, 17:34
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Join Date: Dec 2009
Location: Damascus-Syria
Age: 33
Posts: 2
Question High Level Sigwx Charts

Hiii All
Before Your Flight You Receive Sigwx Chart
World Area Forecast Center
Fixed Time Forecast Chart
Valid 00 Utc On 23.feb.2011

Is It Means Valid Until 00 Utc Or Valid From 00 Utc Until The Next Fixed Time ?

Actually Am Confused , I Had Alot Of Discussions About It And Each One Says To Me Different Answer ,so Please If Anyone Have An Answer From A Book And Can Clarify This Subject
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