Weather minima for alternate airport

[Klosterman]

Once you airborne and arrive to destination your dest is closed.
What is your planing consideration for alternate.
For example if yor altn is cat 3 and weather is just above minima, could you take ti as alternate, or you should find another one.
But by euops.

[minimumunstick]

Alternate minimums are for planning purposes only. Do whatever is appropriate for that situation.

[Breakthesilence]

Once you are "in flight", planning minima will not be used anymore and you must evaluate the actual situation (weather, fuel, Maintenance assistance, Airport facilities etc.).
In the aforementioned situation, I would look for another alternate :}

[mustafagander]

In my part of the world any time your destination is below alternate criteria you require an alternate. End of story.

Even though you will get in using cat 3 autoland, you must hold a viable alternate to attempt the approach. These are the rules in Oz.