Originally Posted by
JayBee
I'm assuming your being serious and not being facetious...
We were talking about anticipating delays and 117 extensions - not whether it was legal to depart or not. To answer your question directly if you are leaving and arriving within the same hour then the METAR is controlling (this is the Regional sub forum...).
To further the anticipating delays discussion - we have synoptic discussions, Satellite, IR, Radar, Constant Pressure charts, SFC plots, Skew-T, etc, etc.
For flights under 60 minutes to destination then meters must be considered, the lowest is controlling. So no you still can’t launch with TAF under mins.
If you’re going to argue that “unforeseen circumstances” weren’t unforeseen because charts showed this WX was forecast then I think you will lose that every time. Circumstance had to have been known in time for a schedule change to avoid. Schedules come out the month prior.
In short, WX, MECH, ATC, you can be extended, you may opt out, your options for that vary with airlines.