3 words - DIVERSION TO ALTERNATE. It's SOP in most good airlines.
Only excuse to land there would be shortage of fuel. No other reason!
I once had to land at Jandakot (Perth civilian/GA airport) in what started as 12 knot crosswind (the cross runway was NOT an option since it was worse. There was a MASSIVE storm coming in off the ocean) after taking over from the cadet (they only allow them specific crosswind rating limits). CTA kept advising all the way down on the changing status. By the time I had all 3 on terra-firma, the x/w was 28 knots - quite a LOT more than the aircraft was even rated for! It was NOT a decision I took lightly, but rather had to URGENTLY, as to divert would have taken MUCH longer and we would then have been well and truly in the squall line of that mother of a storm (that turned EXTREMELLY violent!)
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