bubbers is right that the PIC must decide...but information is helpful.
I've discussed the situation as I've listed, tower folk not wx observers etc...and I tell my pilot friends just say: I need you to tell me what you see out your window RIGHT NOW...plain english...and not read me the METAR.
It helps.
and if you are going around in bad wx...more power is better than less power, stay on instruments...the CLT crash...the pilots didn't push the throttles up to full GA power right away...and even delayed firewall power...