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Help with BECMG in a TAF

  • boeing777mark
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boeing777mark created the topic: Help with BECMG in a TAF

Hi guys just need a little help with this example. TAF reads YDUK 280033Z 2802/2814 33010KT 4000 SHRA RA BKN012 BKN020
BECMG 2808/2810 9999 SCT035
T21 22 21 19 Q1020 1020 1018 1018

The conditions in BECMG are better than the TAF so I understand the there is a 30 minute buffer and any flights after 1030 do not require an alternate but my question is why is it not 0830 when the condition are actually getting better after 0800

If anyone could help with this question that would be great as I'm sitting my MET exam in a few weeks

Thanks in advance :)
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bobtait replied the topic: Help with BECMG in a TAF

'BECMG' In a TAF indicates a gradual change. In this case the change is from 'bad' to 'good' conditions. The change will commence at 0800 but it won't be complete until 1000. You can't assume that the conditions have improved until the change is complete. That is untill 1000. The usual 30 minute buffer then applies. So the OPR will not be lifted until 1030.
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  • boeing777mark
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boeing777mark replied the topic: Help with BECMG in a TAF

Thanks so much bob for you're reply. There is still a little bit of confusion there but I will work through it. Little more study I think before I book this test.
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