We don’t have weather color codes anymore. Don’t get offended if they call with a flight. Just be the pilot you are trained to be and asses each flight as they come to determine if it can be safely done. It’s really no big deal. I don’t care if I’m the 4th aircraft to have been requested either. This helicopter shopping thing is silly. If you can’t do it then say so. Of course factor the fact you are number 4 into the decision making.
We are lucky to have VFR and IFR assists cover each other. Thus when a VFR base declines it goes to the IFR base. It won’t go to another VFR base in that case.
Back when we had the weather codes, a base would go red, go to bed only to wake up 10hrs later and find the weather changed and was clear! So updating every few hours is acceptable in my opinion if you still use weather codes.