Weather declines by Med Crew  

If you went to crew and said well it "might be" good now, then you involved them and they said no, thats it.  If you looked and weather was good then its good to go.  Some flights, esp scene calls, it does no good to try and make it only to delay an ambulance from just going to the hospital.  Ususally a reason the crew says no and not to just get out of work.  Remember you're a team.  It works both ways.  Many things happen over the years, you may do something that is concerning to them, do you want an environment where the crew does a confidential safety report over something you could have talked through?  If its a frequent occurance with the same person, then talk it out.