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Wea serv valid issua

Only valid time and Issued time

QuestionAnswer
Metar ( Issued ) 50 Minutes of each hour
TAF ( issued ) 4x a day at 0z 6z 12z 18z
TAF (Valid) 24 hours
Metar ( valid ) issuance time only
FA (issued) 3 Times a Day
FA (Valid) 18Hours - 12 hours forecast - 6 hours Categorical outlook
Airmet ( issued ) every six hours starting at 01:45 UTC
Airmet ( Valid ) 6 Hours
SIGMET (issued) Unscheduled
SIGMET (valid) 4 Hours
Convective Sigmet ( Issued ) Hourly at 55 of each hour
Convective Sigmet ( Valid ) 2 Hours
Surface Analysis Chart ( Issued ) Every 3 hours
Surface Analysis Chart ( Valid ) At issuance Time only
Weather Depiction Chart ( issued ) Every 3 hours starting at 01Z each day
Weather Depiction Chart ( Valid ) at issuance time only
Low Level Sigmet Prognostic ( issued ) 4 times a day at 0z 6z 12z 18z
Low Level Sigmet Prognostic ( valid ) 12 and 24 hours
Created by: Israelleite
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