Having flown with Centaurus, (many moons ago), I know he is not at all an autocratic captain and flying was always enjoyable and informative, but in my latter years of flying I did come across what I call the 'New Age' FOs who invariably have never been in the military and would challenge for challengings sake, rather than for anything productive. A previous poster said;
the question "who has control" is valid.
I disagree entirely, there is a realm of difference between command and control, but, in the case quoted in the OP, I do believe the captain should have prompted the FO into action by drawing his attention to the weather ahead and giving him the opportunity to participate in the decision making process.